CL / CB / CA Crankshafts - differences

[LOUD MOUSE]

Now Now there feller for sure!!!:-) ..................lm

I use my middle finger.
I put it in the outside balance hole.
If it fits the hole with a little loose it's a 305.
If it's tight it's a 250.
Of course ya would need at least one of each to compare but if ya only have the 305 then the hole will be loose. ................lm

Well,..this is one post that you don't want to just pop into the middle of without reading the prior stuff first....if you know what I mean.

[teazer]

Thanks for that info. I'll go and measure a crank and see what I find. i think I have a NOS crank still in its box, but it may be a CL.


Yep, it'sa CL77 crank new in the original box. It does not have a starter clutch oil feed hole in the crank end that the CB's have. The "holes" at 23.8mm on that crank and 24.0 on a lightened CB77 crank. Flywheel OD is 121mm and the inner wheels are 21.7mm thick at the machined rim.

When I get to a CB72 crank I'll post those sizes but I expect they will be as LM suggested.