Doco Overboard
Ultimate Member
I built a hellish 68 Triumph chopper one time from a basket. Never should have sold it off. This old guy I worked for doing mechanical repair schooled me for shrinking new brass races into the cases and how to time them properly so you don't melt a piston. Paper thin domes and a little early or late and you could be done. Two cams/idlers with one crank gear. 136 revolution? to get all the marks lined up before you locked the flywheel with a stop behind the jugs but not before a piston stop in the head met TDC. You applied a factory made degree wheel to the crank and soon as your test light lit you locked the advance plate down. Second kick every time like clock work. Used to fab drop in baffles that could be tuned to lean/rich fuel mixture so you didnt have to re-jet with cold/ warm weather. Too lean always right on the edge for detonation for max vacuum/ volumetric efficiency.
BSA/ Norton entirely different game job, very fine machinery. Split cases in a natty boh box no timing marks what so ever on the crank parts used to love that sh&%t need to rig another throttle cable vise grip apparatus and find some avon rubber. 35 years later I probably weigh more than a dry 650 Triumph glad I looked in here brings back memories.
BSA/ Norton entirely different game job, very fine machinery. Split cases in a natty boh box no timing marks what so ever on the crank parts used to love that sh&%t need to rig another throttle cable vise grip apparatus and find some avon rubber. 35 years later I probably weigh more than a dry 650 Triumph glad I looked in here brings back memories.