boghopper350 Posted August 21, 2013 Report Share Posted August 21, 2013 Hi. Does anyone know if the bearing and seal sizes ie mains and clutch, gear selecter etc, are common for all the 5 speed sherpa crank cases throughout the years. Quote Link to comment Share on other sites More sharing options...
woody Posted August 21, 2013 Report Share Posted August 21, 2013 Somewhere around 1973 the gearbox mainshaft diameter changed where it sits in the clutch side bearing, therefore so too did the bearing size. Can't be any more specific than that though, sorry, no idea if there is a specific model number this occured from. Crank bearings and seals are all the same size Clutch hubs and baskets differ, as does the spacer the hub sits up against Later gear selectors forks are thicker than early ones and won't fit early gears Bultaco UK is your obvious source for this info Quote Link to comment Share on other sites More sharing options...
guys Posted August 22, 2013 Report Share Posted August 22, 2013 (edited) You may have to search a bit but most bearing sizes are there: (Be advised: I don't know if some Bultaco bearings have more play than standard, for instance C3,) http://www.francetri.../en/21-bearings Seals: http://www.francetri...en/16-oil-seals No worry's mate Edited August 22, 2013 by guys 1 Quote Link to comment Share on other sites More sharing options...
boghopper350 Posted August 22, 2013 Author Report Share Posted August 22, 2013 Many thanks, I'll give them a look. I am aware of the fact that some of the bearings need to be C3 spec, and also of the need for viton seals for the crank. 1 Quote Link to comment Share on other sites More sharing options...
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.