Forty Six

I went up to Summit Point yesterday, and I learned a few things.

Why I went to The Track and what I was doing up there will have to wait till later to fully relate, but a trivial thing I did learn is that hanging out in The Pits in full leathers – even on a not that hot sunny day – is a hot, sticky business. There was room for a lot more potable water than I carried in the hard cases of the R90S – I should have made better use of it.

After an enthusiastic R90S blast over the 30 miles of backroad twisties and US Highway that lies between Summit and The Shop, and after an equally enthusiastic shedding of my Vanson pants and jacket, and a perhaps more enthusiastic glugging of about 2 to 3 quarts water and some foodstuffs, my increasingly cogent thoughts – resulting from non-negative blood sugar levels – turned to some way of really cooling off a body that was still running marginally hot.

With the sun finally having set and the temperature having dropped just below 70 degrees, I grabbed my perforated jacket, helmet and gloves, and the ignition pin for the Slash 5. As my only bike without a windshield, The Toaster was the best way available to catch a much needed full body breeze.

As I threw a leg over, and turned on the ignition, I found it nearly unbelievable that my oldest motorcycle had somehow come to be forty six years old. If this bike was somehow old, then I was, too. Forty Six years old didn’t seem to have any effect on a motorcycle whose starter motor slammed into place like a light sledgehammer and heaved the big bore twin to life on the third compression stroke. And Forty Six years old didn’t stop an engine that came off the enrichener after only 10 seconds or so, and that settled into an absolutely even 1100 rpm idle. Some of this motorcycle’s seals might be a little seepy, but the hard parts were still as fit for purpose and almost as tight — 180,000 road miles later — as when they were designed.

There is almost nothing modern about a motorcycle like this, though. Ride-By-Wire? Only if the wire is a 16 strand steel Bowden control cable – which on the Slash 5 connects a gear-driven throttle cartridge to a pair of Constant Velocity Bing throttle butterflies. There isn’t a micro- or even a macro-processor, or anything digital, for that matter, anywhere in the machine. Everything – Ignition, Fuel Delivery, Instrumentation — is Analog – an ancient world where all of physics was continuous change – instead of a series of discrete values snapshotted every few milliseconds or so – there was this world which consisted of all the time in between that the digital world has dropped. If we ever have one of those Electromagnetic Pulse events that destroy all of our electronic technology, the /5 will be one of the few motor vehicles that will be left to run. Brakes? Both ends by drum, actuated by cables. People will joke that these brakes are ‘anti-lock’, but those people do not know how to properly adjust these brakes, and they would be wrong. The handlebars have two multifunction switches. Two. That’s it. Ignition – rather than by Bluetooth or even by key, is by a Bosch ignition pin that would have been common to every German motorcycle, scooter or moped made during a two decade postwar period.

You could look at such a machine as ‘obsolete’, but that would be missing an important point, which is that this 1973 BMW is still as much of a balanced thoroughbred of a motorcycle today as it was when Bob Lutz was pitching it and was pictured wearing tan-colored leathers on this exact model and paint color bike outside the Berlin Factory Gate sometime in 1972. Turning from neighborhood streets up the state highway towards Brunswick, in each successive gear the motor provides a lovely crescendo of thrust which combines with the bike rising front and rear under acceleration – each gear being literally onward and upward. Each gearshift is deliberate and percussive, with the suspension falling as the power is dialed off, and then rising once more as the power comes back on again.
Most BMWs I’ve ridden seem to have a really serene, unstressed spot in their rev bands right around 3900 rpm – in top gear the bike is loafing, and just riding that little aeromotor hum blithely along. Tonight the goal is to stay in that sweet spot – to just cruise along and drink in this perfect evening. The original mufflers on the /5 — are tuned to allow the tiniest bit of the low frequencies of the exhaust to rumble, while keeping overall sound pressure levels at societally responsible levels. The longer I’ve ridden motorcycles, the more I’ve come to appreciate the ability of a quiet exhaust not to rat one out when one is riding like a total knob.

Original Zeppelin-shaped Mufflers — there’s a lot of exhaust tubing in there…

I resolved to stay out of the bottoms and on the county’s straighter roads – this spring we’ve had a very active deer population, and lots of black bear incursions as well. These slightly bigger roads give me the best chances to see and react to these little potential deer or bear hugs that have a bad tendency to end badly. 180 West, 17 up to Middletown, US 40 Alt over Braddock and down to Frederick, and then Butterfly Lane and back to 180 West, coming back to Jefferson from the east. Forty miles of feeling the just cool enough to be pleasurable air coming through the perf on my leather jacket and listening to the boxer’s little aeroplane sounds.

Halfway up MD 17 to Middletown, the cooling temperatures must have hit the dew point, because suddenly the road was bordered by swirling wisps of fog, which grew as each mile rolled past. Far from being uncomfortable, the slight chill was entirely welcome – helping my elevated core temperatures back in the direction of nominal. Coming over Braddock Mountain is one of my favorite Slash 5 rides – at 60 mph the big sweepers that mark both the ascent and descent are challenging enough to let one know one is motorcycling without coming anywhere close to the Toaster’s handling limits – one can carry good speed and lean angle mid corner and enjoy instant punch from the meat of the bike’s midrange on the exits – if Disneyland had a ‘motorcycle attraction’ it would probably be a lot like this.

Coming back into Jefferson along MD 180 the evening temperature drop became more pronounced – the lowspots in the highway announced themselves with noticeably cooler air blasting through the perforated leather and standing up the hair on my arms and with slightly foggier spots necessitating the use of the tiny faceshield wiper blade built into the left thumb of my Aerostitch elkskin gauntlets. The /5’s boxer motor loved the cool, dense air – the exhaust thrum was a perfect meditative ‘Ohhm’. Three quarters of an hour of this top gear roll had cooled me down perfectly, and brought a nearly perfect state of calm to my spirit. Had this been an amusement park ride I’d have likely been asking Dad to ride it again.

It wasn’t of course, and the ride ended too soon. As I trolled back into my neighborhood I closed the fuel petcocks and stayed out of the throttle. My neighbors likely curse at the teenager with the drag piped Sportster that lives next door – those same neighbors would never know I’d been here. As I rolled into the open garage I pulled in the clutch and reached forward and pulled out the ignition pin before I came to a stop – in 1973 the ‘kill switch’ was still a new, or in BWW’s case, a future technology.

I rocked the bike up on her centerstand, and sat my helmet and gloves on the saddle. I walked over to the ‘Adult Fridge’ on the workbench, and grabbed a Real Ale Revival Grapefruit Nectar – a bracing cold one that would serve as a big exclamation point on what had been a perfect day. Before going into the house, I turned back to look at this old motorcycle – my ‘Alloy Girlfriend’ — time hadn’t done anything to make her less beautiful. Forty six years is nowhere near long enough to make this motorcycle anything but fun to take for a cool, relaxed evening ride.


Got the Zero

Made a trip up to PowerSports East in Bear, Delaware, to pick up a press pool test bike provided by Zero Electric Motorcycles.

I’ll be using the Zero as my daily rider over the next 30 days, and then writing a review of the bike for Motorcycle Times.

I’m now a regular contributor to MT — the Zero review should appear in their November/December issue.

Until then I will be whizzing about, looking for unguarded electric plugs in public places, and trying to think of something else to do with my clutch hand.

One think to think about — 116 ft/lbs of torque available at 0 rpm.

Fasten your chinstrap!

The Burnside Bridge Ballet and Third Gear Festival

Some days feel like they’re just not going your way.

But then they abruptly change direction and they totally do.

The Shamiehs are self-actualizing learners. Consistant with this is my yougest son Finn’s interest in becoming an architect. His mom, Doris has helped him at any step — homeschooling, research, college courses.

Finn says, “Hey mom, this Frank Lloyd Wright headquarters building for SC Johnson in Racine, Wisconsin, looks really cool.”

Doris says, “Hey Finn, let’s go see it then.”

So after a Sunday morning of trying to assist them in a venture that might have been marginally underplanned, I watch my pickup, towing our homebuilt teardrop camper, disappearing with them both rolling out of the bottom of my driveway, leaving Maryland for Wisconsin.

Doris’ road jones was one of her behaviors that convinced me during courting that she was a kindred spirit. So if she’s gotta go, she’d better go.

Me, I gotta work. So I’ll have to take a pass on this one.

It is going to be kinda quiet around here for the next couple of days.

And just in case I was going to have a really ‘up’ Sunday, I was about 2 weeks behind on my yardwork.


After a brisk hour or so with The Honda CB160’s Evil Cousin — The Honda Harmony HRZ 216 — and another brisk hour with Lithium Ion powered string trimmers and various other modalities of unwanted vegetation destruction, I was hot, sweaty, drained and kinda bummed.

I went inside, snorfed substantial volumes of cool water, and chunked a few cashews and raisins.

For every down there is a up, though.

There was nobody around that could tell me I couldn’t go for a ride.

So I went.


To live in this part of Maryland is to have the landscape of the American Civil War constantly all around you.

The battlefields of Monocacy, South Mountain, Crapmton’s Gap and Antietam are all within 15 miles of my garage.

Antietam, and the surrounding town of Sharpsburg, have some truly staggering Civil War history. The roads around Sharpsburg, especially where they come into contact with the national Battlefield Historic Park, largely follow the routes through the woods and farms that exisited at the time of the war.


The Burnside Bridge is a lovely old limestone triple arch bridge, that would be the highlight of many a scenic tour. It is also the site of one of the bloodiest engagements of the Civil War, where a small band of Georgia Confederates managed to bottle up the US Army’s IX Corps, and several other units, inflicting unspeakable casualties on flight after flight of men who tried and failed to cross that bridge and take the Confederate position.

As peaceful as it appears now, it is almost impossble to visualize how in no way peaceful it was that day.


My family mocks me for ‘having a favorite temperature’.

Which I will state for the record is 77 degrees Fahrenheit.

Everybody’s different.

If it wasn’t 77 degrees today, it was close enough to count. On a vintage motorcycle with no onboard digital instrumentation, I just had to believe it was 77 for it to be perfect, and so it was.

The road that follows Antietam Creek up to the back of Sharpsburg, and past General Burnside’s Bridge, is just a road bikers wet dream — it rambles through the woods, following the stream, flanked by rock walls, first on one side, and then the other. There are almost no straight stretches of any significant length.

It follows a route so old that the last of the one-lane bridges that it formally featured was only replaced in the past 30 days.

With the R90 really running on song, its shade was the perfect cool restorative that my soul well needed.


Burnside map

When one turns onto Burnside Bridge Road, one hits the longest straight you’re going to see. At the end of the pasture, the road drops down hard and to the right — into the stream canyon and the shade of the woods.

We’ve had heavy rains lately, and the corner exit was punctuated with a slurry of silt and flat shale chips where the creek had clearly left its banks.

I know pretty well from experience where the wash-outs will be, so a few alterations to customary lines and a little more reserve than usual would be well advised.

A few sliding tires are just all right so long as its all in good fun, now.

Exiting the corner, I made a beautiful, thock-solid sounding, perfectly executed shift into third.

And that’s where that gearbox stayed.


Its grace when a road and a bike are mated so well.

I’m pretty sure an old British Single — Matchless, anyone? — would be perfectly happy out here too.

Each corner just gives back throttle. Burbling on overrun and leaning on in. Rolling back on early and setting the line for the next one.
Over and over and over again.

The tires and suspension are fully dialed in — wheels are moving — compliance! — but the bike is staying perfectly on line.

Arms and legs both get a workout as we lean deep in one direction, pick the bike up and go back over to the other.

If my normal braking habits worked like this, SBS could offer a lifetime brakepad guarantee.

The 90’s motor sounds wonderful — Like Opera! — when the revs come up and stay up. The sound of the engine braking under closing throttle — Accelerator Pump Carbs — is a sound from another time. Modern EFI doesn’t sound like that.

There’s a modern spot in the road where the Feds put a new bridge in. It creates a straight where there clearly wasn’t one before.

I briefly shift up to 4th there, but downshift back to third where it comes back off the modern concrete and the road heads back into the woods before entering town.

Its dancing. Its poetry. It takes one out of one’s self.


There are as good roads as that one that take me back home. Porterstown. Boonesboro Mountain, that rides like a moto — wheels frequently clear of the ground.

But there is always the shining ‘back there’ near Burnside’s Bridge. Light flashing off the water where so many died, and flying like a bird.

Lovesong of the Flying Brick


Is it wrong to love an engine?

If you’re a BMW motorcycle guy, is it an even bigger sin if that engine isn’t a boxer twin?

Are Airhead engines sufficiently sentient to know if you’re ‘cheating’ on them?

“Dude”, you’re thinking, “You’ve got an awful lot of questions.”

“Got any answers?”

The only job of a motorcycle engine is to move the motorcycle its installed in down the road. Seems obvious enough, but how it completes that task is an ingredient that could be used to bake a baker’s dozen motorcycle books.

Now there are lots of guys that will tell you that way too much is never enough. These are guys that think that tire-shredding, burnout producing, ‘wheelies-in-all-five-gears’ power is the only kind of power.

I’m not one of those guys.

Don’t misunderstand me. There are lots of sporting applications where too much and then some is exactly what you want.

Prostock drag racing?


AMA superbike?


But for motorcycles operated on the street, especially for transportation, rather than sporting applications, its not so much how much power an engine can deliver, but the quality of how that power is delivered.

Hold on to the hate mail, peoples — I know this zip code doesn’t have a lot of neighbors.


Its funny how a single extended family of engineers can be so damned consistent.

I’ve ridden briefly in other people’s BMW automobiles, and my limited sample supports the notion of a ‘corporate standard torque curve’.

The CEO of a small company I worked for long ago had a very anonymous looking grey BMW sedan parked outside his office window. The Big Boss was a very conservative management type who had gotten to the corner office as the finance guy. One day, after I had seen him eyeballing my R90S out in the parking lot, he uncharacteristically asked me and one of my managers to lunch.

“So,” he asked coyly, “So you know about bikes. Do you know anything about cars?”

As we walked up to the car, he stuck his key in the trunk lock, and it was just as the lid started to rise I noticed the discrete “M5” badge against the grey paint.

Inside the trunk, it was like F1 Disneyland. There were color anodized aluminum bracing structures everywhere — all with holes of various radii cut into billet. The battery was in the rearmost portion of the right fender — there was a dry sump oil tank and color coded lines in the same position on the left. The strut towers were connected with more billet bracing, and I remember more color — mostly Gold — on the strut units themselves.

“Let’s go for a ride. Buckle your seat belt.”

Never let the countenance of someone who appears to be The Alpha Accountant throw you off the scent of a motor maniac. As the very junior member of this crew, I was in the back seat. Our offices were in a part of Northern Virginia that still could be called rural at that time, and as soon as we left the parking lot and the wheels were straight, The Boss took the accelerator smoothly to the floor.

God is not directly involved in the action of internal combiustion in this world.

But if he was, he would be paying particular attention to the straight six motor of that M5. I don’t recall any wheelspin, but I remember thinking that this was likely a lot like what the Space Shuttle felt like on the gas — I was pressed back into the seat with what felt like several Gs, and I couldn’t get away from thinking that this was the Hand of God himself felt like if he was into acceleration — omnipresent, omnipotent, and getting bigger the longer one engaged with it.

Our company’s Big Guy was customarily an all-bidnizz, humorless sort, but as we made the shift into third gear, and with it, hyperspace, he was in full kid-at-Christmas, laughing out loud, full being joy mode — a man completely transformed.

It was my first drink from the well of Big Bavarian torque.

After many years of trying to get it sorted, that R90S that bossman had been eyeing finally came 100% on the pipe, and I found it lived there , too.

A buddy of mine scored a leased car for a steal — a gorgeous jet black /7 series. It had an M series set of factory widened rear wheels that cost more than both my airheads combined.

Another lunchime ride, another Millenium Falcon experience.

These “Legendary German Engineers”, it seemed, had a thing for “Torque Directly from the Hand of God” that seemed to inhabit and animate their products across models and even across different vehicles. I have no question that their former Aircraft engines and their marine engines all tap into this when they’re in their happy zone and on the gas. Folks have also told me stuff about their European market performance diesels that seem to support this idea, and perhaps take it to another, incomprehensible level.


And that is what brings me to the K1200 longtitudinally oriented, transversely rotating, sideways mounted 4 cylinder engine — lovingly referred to as the last of the ‘Flying Brick’ motors.

BMW Motorcycles are famous for many things. They are also be infamous for a somewhat smaller number of things. One of those things is that the first version of a product that hits the market is never perfect. Another one of those things is that development of that intial concept continues — doggedly, methodically — until it has been brought as close to perfection as anyone could possibly expect.

The BMW K series engines and motorcycles were first introduced to the market in 1983. The design was, in almost every way, revolutionary. There are tales of a test mule that used a Peugeot automobile engine mated to the driveline of a BMW boxer twin that was used to test the basic design concept. Once the basic configuration was found to be sound on the road, the design of a BMW engine and driveline could begin.

The starting point for the engine design was BMW’s Formula 2 4 cylinder racing engine, which had a reputation for bulletproof reliability when being run near redline for long periods of time. The Formula 2 engine — which displaced 2 liters — was scaled to 50 percent to acheive a displacement of 1000 ccs.

The K100 motorcycle’s 4 cylinder, water cooled engine was inline in the frame, with the engine laid over 90 degrees to the left, so that the cylinder heads of the engine were next to the rider’s left boot, and the crankshaft next to the rider’s right boot. This orientation, with the engine rotating transversely to the frame, unlike all contemporary inline fours, whose flywheels rotated inline with the wheels, maintained the roadholding and stability characteristics of BMW’s twins.

The engine, also in contrast to many of its contemporaries, was undersquare, with a longer stroke than its cylinder bore — this was a design necessity as every millmeter of bore added several millimeters to the overall length of the motorcycle, which was already long to begin with. This design imperative — make the engine short enough to fit in the motorcycle, even if it means an undersquare design — ended up creating the K-engine’s most significant feature — torque at every RPM.

Instead of a traditional frame, the engine was used as a stressed member, with steering head and rear subframes mounted directly to the motor. Power transmission was, as with BMW’s boxers, via a 5 speed transmission via driveshaft running in line with the engine crank down a swingarm on the right side of the motorcycle. Unique to the K-bike, though was that the swingarm was single sided – first via Monolever, and later via Paralever, which added an anti-torque reaction link, which controlled the rise and fall of the suspension under drive. Induction was via electronically managed fuel injection, which fed a very conventional 2 valve overhead camshaft cylinder head. Exhaust was via a one piece stainless steel exhaust system, with tuned headers and a catalytic converter.

Cars of this period were seeing such features coming into widespead use, but in motorcycles the combination of liquid cooling, fuel injection and catalytic exhaust was at the time completely unprecidented. The subsequent model year BMW introduced a three cylinder varient — the K75 — that used the same components and engine internal dimensions, with an added balance shaft, to acheive a 750 cc displacement.

Revolutionary advances almost always bring with them unforeseen consequences, and the K-motored motorcycles were no exception. The stressed member construction meant that any engine vibration was transmitted directly to the rider. The 3 cylinder K75s, with their balance shafts, became noteworthy as the smoother operating engine of the family.

The bike’s fuel injection system used an overdelivery and return line system where fuel that was not injected was returned from the injection rail to the fuel tank. In this process, unused fuel served as kind of a secondary coolant, with the fuel picking up more and more engine heat the longer the motorcycle was operated. Given the K-bike’s single wall aluminum fuel tank, filling it with hot fuel, combined with some less than optimum airflow coming from the bike’s cooling system radiators, made the bikes uncomfortably hot to ride, espcially in places like Texas and the American Southwest. It’s easy to understand how this might not have been noticable in the cool, damp German development test environment, but it didn’t make having one’s privates roasted if you were operating the bike in an American summer any more enjoyable.

The original K’s K-jetronic fuel injection used a mass airflow sensor — which placed a flap into the manifold airstream — to measure the velocity of air entering the engine. In practice, the sensor, expecially when dirty, became an impediment to air actually entering the engine, further slowing throttle response that was already not entirely thrilling.

17 years — which is the length of time between the introduction of the Flying Brick and the production of my K1200LT’s engine — is a virtual eternity in terms of engine development. And that eternity was more than sufficient to take the faults of the first K100 engines and correct them. The result, in my humble and completely biased opinion, is one of the most excellent motorcycle engines ever produced, and likely one of the most unappreciated.

BMW went after the faults of the orginal bikes and slayed them one by one. The 1988 introduction of the K1 — an oddball bike that was part top speed streamliner and part sport bike — introduced a more modern 4 valve cylinder head. Bosch components introduced a new FI system — the Motronic — to replace the K-Jetronic — and went to a more modern closed loop with hot wire air sensor system that ditched the mass airflow sensor flap. The combination produced an engine with markedly better throttle response and a really noticable power step when the flow impacts of the 4 valve heads kicked in at about 5500 rpm. All these improvements — as well as a new AntiLock Braking system — were then adapted from the K1 and shared with the rest of the K-bike line.

Engineers kept revisiting the engine’s displacement and internal dimensions, and continued to eke increases out of the tiny spaces with which they had to work — using methods like thinner cylinder walls and higher speed coolant pumps to shrink the dimensions of the cooling jackets until the original 67mm bore and 70mm stroke of the K100 had been maxed out to the 70.5mm x 75mm of the K1200 series. I remember reading an analysis of the K12 engine in a motorcycle magazine — it might have been Kevin Cameron — who observed that the long 75mm stroke, combined with the bike’s 8750 rpm redline, produced a piston speed that was the highest one that had ever been measured in any production street engine, car or bike.


The K12 series engineers also made several additional changes that took the Bricks from quirky machines to fully developed, optimized products. As appealing as the frameless design had been, it was simply not sufficient for the increased power and suspension loads made possible by modern radial tires. The K12 motorcycles adopted a cast aluminium frame that was rigid enough to do anything that was asked of it — and with it the amount of vibration that reached the rider was reduced to effectively zero. That frame was combined with modern full wrap bodywork that engineered both the flow of heated air from the radiators away from the rider, as well as allowed for an insulated shroud around the fuel tank that also kept cockpit temperatures comfortable.


BMW’s engineers, in short, spent a decade and a half completly developing the K-series engine, which simultaneously creating motorcycles that made the best of that powerplant while shielding the rider from their negative personality traits.

Which brings me back to that engine.

An old racer I knew once told me, “It doesn’t make any sense to make more power than you can get to the ground.”

And its exactly that thinking that defines how the K12 LTs behave on the road.

At any sensible engine speed, opening the throttle produces as much torque and acceleration as is possible to use outside of a short, police officer induced trip to jail. A total of 90 some foot pounds isn’t huge, in an ultimate sense, but it is more than sufficient to move these bike’s significant mass in a pretty authoritative manner. The evenness of the torque delivery is also striking — at no point in the curve does it produce less than about 72 foot pounds. These characteristics, when combined with the smoothness of the engine and frame unit, makes the bike sneaky fast — there’s very little sensation of speed, but there definitely is speed.

I posted a ride report to the Internet BMW Riders after my initial test ride. Reading it again today its clear that all of this was gobsmackingly obvious after about five miles in the saddle. Being a bit of a geek, the combination of a very pronounced intake shriek and the sensation of being launched made me think of Darth Vader’s TIE Fighter from the first Star Wars movie. I spoke of being seduced… the Dark Side. Apparently, a lot of folks understood exactly what I meant.

Overall, it is that sense of effortless fitness for purpose, refinement and huge thrust that marks the whole K12 experience. The length and mass of the engine and its placement forward in the frame loads the front tire to a degree that makes the bikes extremely sure footed. The evenness of power delivery and careful selection of flywheel mass create a power delivery character that is tractible in every way — one is completely in control of what is happening at the rear contact patch — and the bike makes complete use of all the power it puts out.

I’ve ridden K12s in LT and RS configurations back to back, and I’m not going to tell you that the RS isn’t fun, because it sure as hell is. There is more power and more torque, but it is located further up the powerband. The rider can go from things happnening fast to what-just-happened-there-crazy-fast, but you have to have the skills and discipline to keep your revs up to enjoy the whoosh. The LT trades some of the top end for a flatter curve, and for more thrust off the bottom. For a Sunday sport rider, the RS is a treat — for everything else — the torque tuning of the LT engine is more flexible and more versatile. There is no wrong gear on a backroad — its just twist and go whereever you happen to be.

The cruise behavior of the engine is a revelation, as well. There is a designed in ‘sweet spot’ at the engine’s torque peak just under 4000 rpm. At this rpm there is almost no vibration, making tank-to-tank riding possible, yet as everywhere else, a turn of the throttle makes everyone else on your road select relative reverse, and brings the horizon up stat. If you’re in more of a hurry than that, a smart downshift gets one instantly to the very top of the engine’s output, and then one gets a dose of the motor’s signature intake howl and had better have a long stretch of open pavement firmly in view, because the here/there transition will occur with Sci-fi abruptness.

Cruising at 5000 rpm in top really brings out the engine’s inner racing monster… engine sound is full-on racetrack, throttle response improves, and counterintuitively, the fuel economy improves as the 4 valve head hits its flow happy zone. Problem is, if you’re going to do this a lot, you’re going to go through a lot of tires, and you should make sure that your bail money is stashed at home where someone can easily find it, because any subsequent conversation with the constable is going to be somewhat unpleasant.

The Flying Bricks possess one other quality, and that is a nearly impossible degree of mechanical robustness and stability. In the more than 100,000 miles I’ve had these bikes — I know I am but a mere K-bike lightweight, a no0b — I’ve been under the engine covers a few times and it always strikes me how the engine internals look like they’ve factory new — having never been run. All of the casting faces are clean — there’s no sign of any sludge, carbon or staining anywhere in sight — hard plated surfaces are shiny, with no wear patterns on the visble valve train components, cams, buckets. I’ve seen that kind of mechanically halo-producing ‘eternal life design’ a few places before — ususally in old Mercedes engines that have already been through more than three-quarters of a million miles and are found on the workbench to not need anything.

The K12 engines look like that with no miles, and they look like that with 100,000.

My current ride has just over 85,000 miles on it. I do let professionals work on this valve train. Their worksheets indicate only 2 of the 24 valve adjustment buckets have needed to be swapped in that time.

My K engines have not used a a single atom of oil.

I don’t know anyone who has worn one of these engines out. Good men have tried. The three people that have tried the hardest to wear flying bricks out have had their bikes killed violently at that hands of others at very advanced ages. Paul Glaves had a K75 that had well over 300,000 miles on the clock when it was struck and totalled by a car. Another mileage big dog from the DC area — Don Arthur — had a LT that was just coming up on 300K when it too was struck by another automobilist. Paul Mihalka had traded in a K75 to a local dealer that used it for a service loaner — it was well beyond 300K when a customer totalled it.

How far might these bikes have gone? Its like the Tootsie Pop and their “How Many Licks?”

Reality keeps biting so that we never get to find out.


Don’t misunderstand me, these bikes are far from perfect to live with.

They’re kind of tough on tires.

There are certain maintenence procedures which, due to some of the ‘semi-planned’ nature of the K12’s engine and frame packaging, are a little challenging.

Removing and replacing the fuel tank — even with some high tech pressurized bronze fuel line disconnects installed — is harder than it should be.

Changing the front shock is fun.

Getting to the upper bolt of the rear shock is also fun.

Changing the crankcase breather hose — which is a rubber part which is exposed to enough heat to make it fail repeatedly — is still more fun.

Did I mention the factory shop manual recommends the use of a shop crane to assist in lifing the frame off the motor for that job?

I changed the ABS Controller on one once.

I can say without fear of ridicule, that it made me cry.

More than once.


But that stuff is complely forgotten the minute you roll the throttle open.

The clouds part. The Hand of God emerges. He places his hand on the small of your back.

And deftly shoves your ass straight out your left ear.

And does it again, every time you ask, for a half million miles or until you lose interest, whichever comes first.

I’ll freely admit that the seeming ease with which it does this somehow strips the experience of some emotional component.

A full throttle run through the gears on my R90S is ecstatic, soul stirring — every sensory input, every power stroke colludes to make you feel deeply: “I am going hella fast.”

The same experience on the K is all Joe Friday: “Just doin’ my job, ma’am”.

And that’s how, I think, that what is objectively a magnificent motorcycle engine gets given universally short shrift by riders and moto-scribes.

By makeing whatever you ask of it just seem too damn easy.