Buells are the Harley-Davidson street fighter. They are inexpensive,sharp-handling machines that give the American rider something toshout about, something to fuck with and something to race.
This bike won’t compete with the 200 mph Japanese sportbikes, but it will handle like one, and brake like one. So we gothold of one and evaluated it for the Sturgis 2001 run. Since I come from a custom bike or chopper background, I wasn’t sure the Cyclone would do the job for me. If you ask a guy who rides a custom bike what style of bike he enjoysand why, the answer might be strange. I want something distinctiveand bad. I want it fast and cool. I need it to handle, but be achopper. Perhaps an oxymoron of conditions, yet there’s a mixture offactors that go into any ride and machine. Last year I rode astretched rigid with a 14-over front end. What a machine. For a rigid,it rode like a dream. For a 14-over front end, it handled well and Ipassed everyone I dared to pass, generally because I had the groundclearance to shove it close to the pavement and the raked tripletrees allowed me to turn the front end where I needed to go.
Each year the trek to the Badlands takes on a differentdemeanor, and this will be no different. After a week, I discovered a serious sense of enjoyment about straddling the M-2 Cyclone. It’s light, fast, a nimble handler that stops on a dime. I needed to learn to ride it like a race bike with my toes on the soft rubber pegs to enhance turning radius and ground clearance. There is also a notion that in the sportbike position, you’re forcing too much weight on your wrists. I discovered quickly that if I put my ass down,the weight on my wrists was not a problem. The force is substantial, however, when braking with a passenger on board. Ultimately, after riding two Buells, I decided that this motorcycle deserved a shot at aSturgis trek. It had class, felt sporty, even nasty, and I could makeit rumble. So I stood back and thought, “Can I make it even cooler?”It didn’t take long to discover that I could strip it down evenfurther than stock. I picked the Cyclone over the model with hard bags because of its bare bones feel. The crew here at Bikernet.com developed a five-pronged approach. One, we wanted toenhance the Harley-Davidson marriage with Buell and downplay thelittle-known name Buell for the time being. We also wanted to enhance the Sportstermotor and bring out the looks of the Harley-Davidson power plant, andchop it in a Buell way without altering the geometry of theframe, the front end length or lowering it, which is a tradition withour custom bikes. There’s more. We wanted the bike to sound more likea Harley and we wanted to enhance the performance without disturbingthe long-range reliability.
Our team included myself, Professor NuttBoy, consulting fromPaul Davis of Charlotte, Gene Tomasen Jr. from the Harley-Davidson fleet center, and a number of Bikernet readers who knew about and were testing Buells. This is the first of several techs on the modifications and the experiences we have with the M-2. We collected and ordered parts, then ran to the fleet center to get thejob done. The initial plan was to unleash the natural performance ofthe bike without breaking down the engine. We started by removing thecarburetor.
We replaced the needle in the slide with an ’88 Sportsterneedle, and drilled out the carb body above the idle adjustplug.
That allowed us to knock out the plug and back outthe idle adjuster 2.5 turns.
Stock carburetors are adjusted from thefactory to a very lean condition. Usually they are so lean that warmup takes a long time and you get an occasional cough through thecarb.
Others have recommended drilling directly through theplug, but Gene warned that if you slip, you will drillinto the adjuster screw and possibly damage it. Gene also recommendedhead work ultimately coupled with a 44 mm CV carb, manifold androller rockers in the future. I had a Screamin’ Eagle air box for a BigTwin, which I modified for the carb with an open K&N filter. We alsodropped the float bowel and replaced the 42 pilot jet with a 48. Becareful not to strip the screws holding the float bowel in place.Treat them with respect or they’ll cause you nightmares.
We set the carburetor aside and began to remove the timingcover to replace the cams. It’s important to take a scribe to thetiming plate so that you can duplicate the timing once you havereplaced the cams. Then pull the plate and the rotor cup, which isscrewed into the No. 2 cam. Before you go any further, remove the rockerboxes and the rocker arms to unload the tension on the non-adjustablepushrods. Now you can remove the cam cover, but don’t forget todrain the oil first.
At this point we decided to add a racy feature to theappearance of the bike by shaving the cam cover plate. First removethe oil line. Unplug the timing plate wire, dismantle the connectorand pull it through the plate.
Gene used a Sawzall and a grinder toremove the aluminum underneath the bolt holes.
You will note that there is a series of seemingly endless webbing in this area which is for noisereduction.
Notice that in the lower left hand corner, there is a dowelpin. Gene chose to leave it in place as a wiring guide and carve thecover around it.
The pushrods are color coded: pink or red forexhaust and brown for intake. The cams are numbered like you readfrom left to right, or back to front, 1 to 4. Make sure you pull theplugs for ease in turning the motor over. Install No. 4 first with redline assembly lube; No. 3 has two index marks. Slip No. 1 in next andNo. 2 last. It has three index marks to line up the cam with the pistonposition and the other cams with an index mark that aligns with aslot on the pinion gear.
This is where we noticed that the pitch onthe Screamin’ Eagle race cams was different than the new pinionshaft gears. An emergency run to Bartels H-D was in order for partNo. 24055-91, or No. 24061-91. The factory changed to a new pitch in ’99.When replacing the cam cover, keep in mind that there are fourdifferent length Allens holding it in place. Make sure you have theright length in the right hole. The torque setting for the cam coverAllens is 17 foot pounds. After the cover went back on, it was timeto reinstall the rotor cap and the timing plate.
These modifications will help it run better. Buells usually run hot from the factory because of hotter cams and ThunderstromHeads. At this point we re-ran the wiring to the regulator behindthe oil pump for a cleaner appearance. We only had to extend onewire, to the oil pressure switch. Gene Jr. handled it with solder andshrink tubing. Removal of the gastanks is a breeze and access to the heads and top end is easy. But ifyou need to remove the engine, the fact that it is an integral partof the frame and suspension creates unruly problems. The entirechassis must be supported.
At this point we replaced the pushrods from the top of theengine and replaced the stock rockerbox covers with chrome units.Don’t use anything on the self-sealing gaskets except a dab of greasehere and there to hold them in place.
With the engine assembled, we replaced the stock exhaustwith a Buell race header kit and module. While Gene Jr. was out oftown, I spoke to the Buell tech of the demo fleet, Alan Varsi, who hasworked at Bartels Harley-Davidson for more than 11 years. The Buell racemodule retards the timing 5 degrees and eliminates the rev limiter.The stainless steel header is 11 inches longer than stock, which makeseach exhaust runner equal in length. The muffler is an aluminumcanister type that is high flow with low resistance for additionalperformance at the high end.
That’s it. Laughlin is right around the corner, along with our firstlong ride on the Harley-Davidson Street Fighter. We’re lookingforward to every desolate mile. We’ll report upon ourreturn. A new paint job is in the wings, along with some cosmetic modsto brighten the look of this bad-ass bike.
