Well, truck and car builder, motorcycle builder for years. Scaling down. Although I don't really consider it "down". Just a different part of the same art. Here I am up in the hills by Yosemite Nt'l Park. So, being too big, I'm now sporting a 48 tooth sprocket. We'll see what that does. I'm pretty committed to four strokes. This build is about 95% done. Rack and some details still to come. I'd really like to find a four stroke with a jackshaft set up that does not require a machinist. Some stuff I can do. And, some stuff I'm just barely smart enough to know not to tackle. https://magwa.smugmug.com/Gasbike/ Hope to be building and contributing to the Forum for a good long time to come.