jasonsb Posted July 7, 2007 Report Posted July 7, 2007 Crank seized up between crank thrust washer(copper colored) and rod. This is the 2nd time this exact scenario has happened. The 1st time I figured it was because of a stock crank not handling the new power. I replaced the stocker last year with a hot rod +5mm long rod welded. Any tips on how I can prevent this same damage? Appreciate serious help/advice! Background on findings so far: pistons tiny pits but still good, cylinders not scratched, one rod seized at crank, cool head may have been leaking in cylinder...will have it surfaced along with cylinders. Quote
dajogejr Posted July 7, 2007 Report Posted July 7, 2007 Crank seized up between crank thrust washer(copper colored) and rod. This is the 2nd time this exact scenario has happened. The 1st time I figured it was because of a stock crank not handling the new power. I replaced the stocker last year with a hot rod +5mm long rod welded. Any tips on how I can prevent this same damage? Appreciate serious help/advice! Background on findings so far: pistons tiny pits but still good, cylinders not scratched, one rod seized at crank, cool head may have been leaking in cylinder...will have it surfaced along with cylinders. Crank is only as good as the maintenance and tuning done on the bike it runs in. A shattered or chunked up piston usually takes part of the crank with it...bearings or otherwise... Why are you breaking pistons would be my first question? Wrong tolerances, improper jetting, air leak?? Quote
alcoholbanshee Posted July 7, 2007 Report Posted July 7, 2007 Crank seized up between crank thrust washer(copper colored) and rod. This is the 2nd time this exact scenario has happened. The 1st time I figured it was because of a stock crank not handling the new power. I replaced the stocker last year with a hot rod +5mm long rod welded. Any tips on how I can prevent this same damage? Appreciate serious help/advice! Background on findings so far: pistons tiny pits but still good, cylinders not scratched, one rod seized at crank, cool head may have been leaking in cylinder...will have it surfaced along with cylinders. Tiny pits in the piston=detonation. This would also cause undo stress on the crank. I am with Dave figure out your piston prob and your crank problem will go away. Hint, to much timing, and or not enough fuel, and or poor dome design/setup, and or to much compression. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.