Ricco1 Posted June 26, 2018 Share Posted June 26, 2018 My bike is an '82 Yamaha RS125DX. The clutch release is very jerky. I can still ride the bike but setting off needs loads of concentration to avoid stalling. When I pull the lever in quickly it's smooth and when I release it quickly it's smooth, but obviously can't do this when setting off. I never need to pull the lever in slowly but if I do this it's very jerky, more jerky than when I release it. The cable is only a few months old, it's well lubed.Any idea what my problem might be? Quote Link to comment Share on other sites More sharing options...
megawatt Posted June 26, 2018 Share Posted June 26, 2018 What's your tick over like? Is it jerky wnen hot or just cold? Quote Link to comment Share on other sites More sharing options...
Ricco1 Posted June 27, 2018 Author Share Posted June 27, 2018 Tick over bang on at 1200 rpm. Tiny bit of clutch drag when the engine is cold but this disappears when it warms up. Quote Link to comment Share on other sites More sharing options...
fastbob Posted June 27, 2018 Share Posted June 27, 2018 (edited) Remove all the plates and check for warps by laying each one on a very flat surface and trying to insert a feeler gauge beneath it .Do this to both the friction and steel plates Check the manual for acceptable limits . If there's any distortion replace the clutch . Edited June 28, 2018 by fastbob Quote Link to comment Share on other sites More sharing options...
megawatt Posted June 27, 2018 Share Posted June 27, 2018 Also clean and check the release mechanism from the, handlebar to the inside of the engine., Quote Link to comment Share on other sites More sharing options...
Grumpy Old Git Posted June 28, 2018 Share Posted June 28, 2018 Also clean and check the release mechanism from the, handlebar to the inside of the engine., Sounds exactly like the mechanism is sticking - Usually dirt. Strip, clean, rebuild (and while you are at it, check for warped / worn plates as previous reply). Quote Link to comment Share on other sites More sharing options...
Joeman Posted June 28, 2018 Share Posted June 28, 2018 Tick over bang on at 1200 rpm. Tiny bit of clutch drag when the engine is cold but this disappears when it warms up. Shouldn't be any drag at all on a 125. Quote Link to comment Share on other sites More sharing options...
Snod Blatter Posted June 28, 2018 Share Posted June 28, 2018 If it's high mileage then there is a possibility of the fingers of the clutch basket having notches in them. Something to check for if you end up going in there Quote Link to comment Share on other sites More sharing options...
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