I have been building a za50 and found that my stock crank was bent, so i purchased new bearings, seals and a race crank off of 1977. I measured my stock crank with races from end of race to race and got a measurement of 58.32mm. I then pulled my old races off the crank and took out a .2mm shim from the clutch side on the stock crank and it looked like there was a .005mm shim that had adhered to the crank on the flywheel side.
I then ordered a .2mm, .005mm x2 shims from treats for the flywheel side.
I have pressed the races into the case along with the .2mm and .005 shim onto my race crank with a 40 ton shop press to make sure they are straight on.
I have since tried every combination of the shims i have to get the crank to stop binding but have not succeeded.
When i close the case with the gasket in and the bolts tightened in a star pattern I am still getting bind (when I assemble my transmission the sprocket spins the piston in both ways)
I assume this means my crank is still binding and has not been shimmed correctly.
Any advice would be appreciated as I am stumped and would love any and all input.
Also if anyone in new england could help i would make the trip/ pay you for the help.
Also i have been checked the bind by not putting the transmission cover on as to make sure it is not the tranny side endfloat that is causeing it. im not sure if that is helping or hurting.