Main drive sprocket off the crank

Adventure b4 Dementia · Wed Aug 08, 2012 2:35 pm

Hi
Can someone please tell me if this is a Left hand thread? Need to remove it to get the back of the chaincase off?

Thanks

clive · Post by **clive** » Wed Aug 08, 2012 4:05 pm

yes you need to get the drive sprocket off to remove the chaincase on both the tin type and I think also on the aluminimum (you don't mention year of your bike.) The only left hand thread is the one holding the small timing pinion on the other end of the crank.

paul knapp · Post by **paul knapp** » Wed Aug 08, 2012 4:05 pm

No, it's a right hand thread. The crank turns anti-clockwise looking at it from the end so the bolt turns against the rotation to tighten.

Adventure b4 Dementia · Wed Aug 08, 2012 4:43 pm

Thanks a lot! Its a 1957 BTW!

Adventure b4 Dementia · Wed Aug 08, 2012 5:03 pm

Adventure b4 Dementia · Wed Aug 08, 2012 5:04 pm

Do yopu know what size the nut is please? I need to go shopping for a socket!

clive · Post by **clive** » Wed Aug 08, 2012 8:20 pm

I think it is the same size as the nut for the rear wheel spindle

Adventure b4 Dementia · Wed Aug 08, 2012 8:31 pm

Sorted - engine out now, off to be sleeved back to standard.

Thanks a lot for your help