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If the original key is an alloy make sure you use an alloy key to replace it with... there meant to fail to prevent crankshaft damage. Common cause of shear pin/woodruff key failure: 1 rapid stop of flywheel (same as lawnmower blade which is part of the flywheel weight) 2 backfiring 3 loose flywheel...

sbrumby wrote:No nothing to spash feed oil. But the space where the crankshaft was is half full of oil, so the bearings are half submerged.
Dont forget they used to work with just a mist of oil now they have plenty.

Good to know. I suppose some kind of baffled vent wouldn't hurt either.

That's a very good written description of how you did it and will help a lot thanks, I have access to a small lathe 3X12 and lots of metal practice material , I also have a small milling table for the lathe bed so key ways are no problem, the picture was very dark and not easy to see clearly between...

Like my old granpa used to say....There's nowt new in this world. Take a look at Sam Bumby's Ruggerini powered VFR Honda and zoom in on the gearbox... RD350 (RZ350 in the States) with the cylinders lopped off and a triple belt drive. Cheers Dave Thanks Diesel Dave I couldn't find that one please po...

The point of using a 2 stroke as the base transmission in a diesel build is for those that don't have access to an aluminium welder to close the 4 stroke transmission that in most cases uses the same oil supply for the engine and transmission. In the 2 stroke engine the lower chamber below the pisto...

With any small engine assembly the crankshaft is a balanced assembly. So here is the idea, remove the piston, cylinder and the con rod from the donor engine assembly, add 1/4 to 1/2 cup oil to splash lubricate the low end bearings and cap the cylinder opening with a gasket and a metal plate. On the ...

Congrats to both you and the mom on the new one, bet that will cost you some sleepless nights, now to business, when you were doing the early part of your CB350 build did you take any pictures of the transmission modification. That would be of great interest to many including myself. No bike yet but...