Bultaco

I went ahead and shifted the swingarm closer to the centerline of the bike. I created a spacer for the left side of the swingarm from 3/8″ steel plate. Not only did … Swingarm Spacer FabricationRead more

I got the steering stem back from the machine shop, and I actually gave them all the right dimensions to make it work. Here you can see where the diameter was turned … Machined StemRead more

I still haven’t decided whether to re-machine the swingarm pivot to eliminate the swingarm offset, but considering it led me to re-order a few tasks. I did some measuring and determined that … Steering Head designRead more

I re-read through my earlier posts, and it dawned on me why I offset the swingarm to the left in to begin with. (That right there makes this build blog worthwhile, even … Swingarm spacer ideaRead more

I finally pulled the Bultakenstein project out again. I mean that literally; I haven’t accomplished anything new, I just took the frame down out of the rafters, pulled the swingarm off the … Back at itRead more

I’m putting this project to bed for a while. Christmas presents and holiday parties will drain the finances a bit over the next month or two, and then I am going to … Swingarm primedRead more

This morning I made my swingarm shaft spacer. Starting with 7/8″ OD .156 DOM, I cut it to length with a hacksaw, filed the ends a bit to ensure that the faces … Swingarm spacerRead more

A tiny milestone reached: I actually bolted the swingarm to the frame this morning. Here it is from the outside… …and inside. The holes in the frame plate are tapped. I may … A (Minor) MilestoneRead more

I’m working on the escutcheon plate that will decrease the diameter of the left frame hole for the swingarm shaft. Not finished yet, but this in-progress fit-up gives you an idea what … Escutcheon fabricationRead more

My plan to use an external plate to neck down the diameter of the frame’s existing swingarm pivot hole in got me thinking more thoroughly about what I needed. Some careful observation … Escutcheon plate designRead more