I gave up on installing a true jackshaft in favor of a single idler sprocket. There simply isn’t room for it without extensively modifying (almost completely re-engineering) the swingarm pivot. Beyond that, … Idler sprocketRead more
Spec’ing brake parts
One of the cool things I want to do is build this bike with no foot controls. The shifter-less torque converter makes it an option, so — why not? As a bonus, … Spec’ing brake partsRead more
Rear sprocket modification
I re-drilled the CRF150R rear sprocket to match the EX500 bolt pattern. I used the sprocket carrier as a jig and used a transfer punch to mark where to drill. The new … Rear sprocket modificationRead more
Speedometer mock-up
I bought a speedometer from a Suzuki GZ250 and set it on Bultakenstein to see how it looks. It’s a bit on the large side, but the angle and placement are nice. … Speedometer mock-upRead more
More jackshaft design work
Instead of an actual jackshaft, someone suggested I mount a single, freewheeling sprocket on the swingarm pivot. That’s an excellent suggestion, and definitely worth considering. For right now, however, I’m going ahead … More jackshaft design workRead more
Progress photos
I rolled Bultakenstein outside for some progress shots, to keep me motivated. Chassis fabrication is basically complete; now it’s on to engine work, intake, and exhaust. There have been a lot of … Progress photosRead more
Revised steering complete
I got the front end back from my local welder, all nicely TIG’d up. I started working on a new steering stop adapter to fit the revised steering stem setup. Once the … Revised steering completeRead more
Aprilia to Grimeca swap
I had a nifty matched set of Aprilia brake and clutch master cylinders lined up for the Aermacchi-Ducati Special, but both right and left are 14mm units. That’s waaay too large for … Aprilia to Grimeca swapRead more
Turning the sprocket carrier
First, I needed to extract the sprocket studs. After 30 minutes in the oven at 250°, I was able to break them loose with hand tools and the proper grunting sounds. It … Turning the sprocket carrierRead more
Rear sprocket
I had to find a #420 size rear sprocket that I can adapt to the Kawasaki rear wheel. The sprocket from a Honda CRF150R has the correct ID, but mounts with four … Rear sprocketRead more