mattycoops43 Posted April 17, 2012 Share Posted April 17, 2012 Trying to change chain and sprockets on the divvy 600, basically the front sprocket nut is totally solid. I have tried heat, then a breaker bar on it but it's not budging. Anything else to try? are all Yamaha bikes from the 90's going to have the same nut? would cut it off, but can't find one listed on ebay or wemoto, but plenty of fzr etc.Any suggestions appreciatedMatt Quote Link to comment Share on other sites More sharing options...
Bogof Posted April 17, 2012 Share Posted April 17, 2012 Trying to change chain and sprockets on the divvy 600, basically the front sprocket nut is totally solid. I have tried heat, then a breaker bar on it but it's not budging. Anything else to try? are all Yamaha bikes from the 90's going to have the same nut? would cut it off, but can't find one listed on ebay or wemoto, but plenty of fzr etc.Any suggestions appreciatedMatt Is it reverse thread? Quote Link to comment Share on other sites More sharing options...
mattycoops43 Posted April 17, 2012 Author Share Posted April 17, 2012 I wouldn't have thought so, normal thread would tighten on forward motion for safety, not loosen, no mention of it in haynes manual either. Quote Link to comment Share on other sites More sharing options...
Bogof Posted April 17, 2012 Share Posted April 17, 2012 I wouldn't have thought so, normal thread would tighten on forward motion for safety, not loosen, no mention of it in haynes manual either. Realised that after I posted. Impact drive it to death! Quote Link to comment Share on other sites More sharing options...
mattycoops43 Posted April 17, 2012 Author Share Posted April 17, 2012 Might be time for the BIG hammer to come out! Quote Link to comment Share on other sites More sharing options...
Revvin Kevin Posted April 17, 2012 Share Posted April 17, 2012 Electric impact wrench is the way to go or ask your local car mechanic to crack it so you can remove it at home. Quote Link to comment Share on other sites More sharing options...
MrBlonde71 Posted April 17, 2012 Share Posted April 17, 2012 They are done up tight, 130Nm.I had a plank of wood through the back wheel resting on the swing arm and someone standing on the opposite side of the bike to get mine undone, got there eventually!!!! Quote Link to comment Share on other sites More sharing options...
Boothy Posted April 17, 2012 Share Posted April 17, 2012 Breaker bar with a piece scaffolding pole on the end Quote Link to comment Share on other sites More sharing options...
Colin the Bear Posted April 19, 2012 Share Posted April 19, 2012 Using a long lever to undo a stubborn stud/bolt/nut is not recommended. The usual outcome is the head shearing off. An impact driver applies the force in little /short bursts and will have a happier outcome. Quote Link to comment Share on other sites More sharing options...
mattycoops43 Posted April 20, 2012 Author Share Posted April 20, 2012 While I agree to a certain extent, anything big enough to require that much force, shouldn't snap. I would be worried a a front sprocket shaft could snap!Anyway, Thanks for the advice guys, I got a proper torque socket and a bit of wood through the back wheel, applied some heat to the nut and off it came! Just going to do fork seals tomorrow morning, and then ready for an mot!Matt Quote Link to comment Share on other sites More sharing options...
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