.I have a very dirty crankshaft and the big end needs replacing. Before I do anything about it do you think there is a market for it as its surplus to requirements? I'm not certain if its for a B31 orB33.
Also confirm if the threads on the shafts are 3/4" and 1/2" 20tpi BSCy. Regards all.
B31 flywheels are stamped 66-610 and I believe the B33 should be 66-635 (same as M20, M21)
Timing side shaft threaded 1/2 inch 20TPI, drive side 3/4 inch 20TPI.
A new big end will cost around 200 quid from Alpha
cheers
Quote from: Pete C on 29 Apr, 2021, 12:17
B31 flywheels are stamped 66-610 and I believe the B33 should be 66-635 (same as M20, M21)
Timing side shaft threaded 1/2 inch 20TPI, drive side 3/4 inch 20TPI.
A new big end will cost around 200 quid from Alpha
cheers
Many thanks for that Pete C. Both of my flywheels are marked 66-635 and the con rod 65-1614, and the suggested cost for a new big end has me thinking if it would be worth my doing it doing anyway. Anyone in the market for a set of B33 flywheels which require a new big end?