Bultaco

Ordered tires about two weeks ago. It’s my next step partially because I want to accurately measure ride height, suspension clearance, rake and trail, etc. as I finish the chassis. But I … TiresRead more

I’ve been working on steering stops the last few days. Here’s the adapter plate I came up with: I shaped it out of 3/4″ thick section of 4″ dia. 6061 aluminum. The … Steering StopsRead more

I picked up a rear shock from a Raptor 125 ATV for $30 shipped. It’ll barely fit in the space available, but the Raptor 125 weighs about 300 lbs, (which is right … New Damper ChoicesRead more

I’ve continued working on the rear suspension, and have a working mock-up. I had to go through a number of different bracket patterns as I narrowed in on what was going to … More rear suspension workRead more

Hugh Weaver’s Bultaco.com had been offering some odd-sized NOS Tarabusi piston kits @ $75 for a while on their website, which is one heck of a steal. The list fortunately included the … Tarabusi PistonRead more

I removed the spring from my XR100 damper, and then trimmed the bottom stop rubber back so the shock can easily move through it’s normal range of travel. (As a side note, … Damper Linkage DesignRead more

The Pursang frame is definitely not an optimal candidate for a monoshock. The problem is not interference from the engine (as Ken pointed out, there’s plenty of room between the cylinder head … Noodling with rear damperRead more

To assess exactly what I’d come up with so far (and help keep my motivation up), I attached the handlebars and set the engine, tank and cardboard seat pattern roughly in place. … Outdoor PicsRead more

I had both of the stock GS450T axle spacers, so once I had aligned everything the best I could using a laser and steel rulers and carpenter’s squares and plumb bobs, I … Rear wheel mounted in the swingarm.Read more

I spent some time working on the rear wheel this morning. I got the grody old tire off, dropped the engine into the frame and lined the rim up with the centerline … Rear wheel inspectionRead more