I didn’t expect to have the Bultaco frame back in the jig, but I need to ensure the wheel is properly positioned on the center line of the bike in order to … New frame measurementsRead more
Φ Bultakenstein [Aborted]
A shadetree amateur’s low-budget, scratch-built attempt to create my idealized motorcycle. After 15 years and totally losing the plot, I scrapped the whole idea.
Swingarm & Rear Wheel
Jumping into my clean-slate revision of this project, the first thing I needed to find was an appropriate swingarm for my Bultaco frame. I needed a twin-shock design with a larger pivot … Swingarm & Rear WheelRead more
Launching Bultakenstein 2.0
So, it’s back to the drawing board. With all my other projects relegated to the storage unit, I was able to get Bultakenstein back to center stage and start tearing it apart. … Launching Bultakenstein 2.0Read more
Re-thinking Bultakenstein
Progress on Bultakenstein had been fairly mired for a while now. I incrementally lost enthusiasm for it. In an attempt to re-energize my motivation for it, I bolted up the “nice” BSA … Re-thinking BultakensteinRead more
Exhaust installed!
My expansion chamber is back from my welding guy, and he did a great job on both the new section of headpipe and the hanger bracket. I bolted it up and I … Exhaust installed!Read more
Rear brake actuation
I need to get serious about re-thinking the rear brake. I had been using an actuating rod, the method used by both the Pursang (frame) and GS450T (rear brake). Unfortunately, my brake … Rear brake actuationRead more
Rubber-mounted expansion chamber hanger
This is my over-engineered rubber-mount expansion chamber hanger, courtesy of SendCutSend and South Bend: I took a lot of time to locate the hanger bracket to the exhaust in the exact right … Rubber-mounted expansion chamber hangerRead more
Exhaust mock-up
I have worked through the initial issues in adapting the aftermarket Astro expansion chamber to Bultakenstein. The headpipe and main body, originally designed to be held together with springs, had been welded … Exhaust mock-upRead more
Expansion chamber tailoring
I bought an exhaust for it last August. With shipping and tax, the total cost was $240—not an inexpensive purchase. It’s an aftermarket, but I have my doubts about the seller’s claim … Expansion chamber tailoringRead more
Engine back into the frame
The motor has been sitting in a crate ever since it returned from the West Coast back in late January, while I’ve been devoting my attention to The Bride. However, my friend … Engine back into the frameRead more