classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: Goldie on August 19, 2008, 09:22:55 PM

Title: CRANKSHAFT BALANCE
Post by: Goldie on August 19, 2008, 09:22:55 PM

I have just had my BSA Gold Star DB32 350 bored out to 400cc by a Gold Star specialist using a Wiesse forged piston.
Would this upset the balance of the crankshaft causing possible vibration, or would it be unnoticeable when i rebuild the engine?

Title: Re: CRANKSHAFT BALANCE
Post by: L.A.B. on August 19, 2008, 09:47:04 PM

If the new piston is heavier, that is likely to affect crankshaft balance, which could increase vibration?