Here’s an orange and black Sportster headed to Michigan, the “Michigan Mafia.” It started out as a bike I was building for myself. A 1995 Sportster frame with an 02 Buell M-2 Cyclone motor. We did quite a few mods to the frame, moving the shocks forward about 6” and building an entirely new rear subframe. Added to the seat rails are sections of 1×2 rectangular tubing split down the middle leaving a 1×1 channel. Attaching these gives a nice flat surface on the seat rails for the mounting of an XR750 tail section. Then we welded in a pan under the seat rails leaving a large “cavity” area for all the electrics which tuck away nicely.
Up front are custom A&A triple clamps holding the 58mm USD MV-Agusta F-4 forks and 6-piston front calipers. The wheels are both 19” front Morris castings (late 70’s OEM from Harley), widened by Kosman. The front being 2.75 x19’ with the rear 3.50 x 19”. Tires are DOT approved “Golden Tyres” provided by importer Chris Carr. Front rotors are Brembo 320mm turned down to 310mm and fitted with Brembo buttons to custom inner carriers. The rear caliper is a 2-piston Brembo on the left side while on the right there’s a Sprocket Specialists aluminum sprocket and DID chain.
The swingarm is stock except for relocated shock mounts and has Racetech shocks holding it in place. New bearings, bushings and hardware. The frame and swingarm both being powdercoated gloss black. The rear sets are custom with Bates peg rubbers and a Storz rearset shift lever assy. On the right side we used a Brembo rear master cylinder from a Yamaha R-1 and made an offset brake lever.
An aluminum 883R Storz fuel tank sits on top with a First Klass Glass XR750 seat base. Paintwork was provided by David Tovar at Superbike Paint. The custom tank stickers were made locally and covered by a generous clearcoat! Seat pad comes from Saddlemen who by the way are a huge supporter/sponsor of all levels of flattrack racing.
The volume is provided by a 1200cc Buell motor with the heaviest Sportster crank and rods balanced by Hoban Brothers in Wisconsin. Branch-O’Keefe did the heads and cylinder boring, with Andrews cams and a 44mm Screamin’ Eagle CV carb. The entire motor is powder coated wrinkle black. Note that the primary has a forward inspection cover so you can turn the crank with a wrench(!) and the entire clutch relief “Lump” was cut off the case, rotated and re-welded in place. This allows the use of a stock Buell clutch cable and clutch lever yet with wider stainless Mule flattrack bars.
We custom made our own manifold from an S&S bolt-on style giving a bigger mounting hole. Mark McDade built the pipes and then we ceramic coated them black. Revival Cycles provided the “Classic” Motogadget gauge and we made a custom mount that consisted of three pieces. An aluminum plate machined to fit the custom triple clamps, a gauge mount and a section of a Joker Machine Sportster headlight mount. All three pieces then welded together. A small battery box secures a Shorai Lithium battery that weighs less than two lbs. and trims about 11 lbs from the stock battery weight. The battery is very close to the 3 qt Moon “Chopper” oil tank that we enlarged by another half quart and added all new fitting locations.
The bike is currently in the jetting/tuning stage, but so far, it starts in about .02 seconds when you hit the button!! And runs hard! Power should be hovering just under 100 at the wheel, but the dyno is a cruel mistress, so we’ll see what she has to say.
Link: Mule Motorcycles