pistonbroke Posted January 20, 2014 Report Share Posted January 20, 2014 I have an Evo 250 2010 and the clutch has now started to slip, so I am going to order a new set of fibre plates and hopefully this should solve the problem . Does anybody know if I should order a new set of springs as well to be on the safe side or not bother ? Any advice or suggestions would be gratefully accepted. Thanks Phil Quote Link to comment Share on other sites More sharing options...
nelly1 Posted January 20, 2014 Report Share Posted January 20, 2014 i wouldnt bother mate Quote Link to comment Share on other sites More sharing options...
0007 Posted January 20, 2014 Report Share Posted January 20, 2014 Depends on the cause of the failure If you have overheated the clutch the springs may have lost their preload You need to measure the free length of the springs, it's quick and easy And it might save you from cooking another set of plates Quote Link to comment Share on other sites More sharing options...
dan williams Posted January 21, 2014 Report Share Posted January 21, 2014 Did you do the clutch fix? Polishing the tabs helps with the slip as it allows the fibers to properly re-engage under torque. Another thing to look for is to make sure your adjustment on the bars lets the lever return far enough to uncover the reservoir port in the master cylinder. When the lever doesn't return all the way the heating of the hydraulic fluid causes expansion that would normally just flow into the reservoir. If the hole is blocked though the fluid pressurizes the system slightly disengaging the clutch. I think the springs are probably fine. You'd have smoked the transmission fluid before you reach the temperature necessary to take the temper out of the springs. Quote Link to comment Share on other sites More sharing options...
p@ul250 Posted January 21, 2014 Report Share Posted January 21, 2014 With the springs only costing £1.50 each from Beta UK. I would! (Part No 2265071000) Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted January 22, 2014 Author Report Share Posted January 22, 2014 Did you do the clutch fix? Polishing the tabs helps with the slip as it allows the fibers to properly re-engage under torque. Another thing to look for is to make sure your adjustment on the bars lets the lever return far enough to uncover the reservoir port in the master cylinder. When the lever doesn't return all the way the heating of the hydraulic fluid causes expansion that would normally just flow into the reservoir. If the hole is blocked though the fluid pressurizes the system slightly disengaging the clutch. I think the springs are probably fine. You'd have smoked the transmission fluid before you reach the temperature necessary to take the temper out of the springs. The adjustment of the lever etc. is correct so I have ordered new fibre plates .It has been getting progressively worse recently so it is more than likely due a new set. When they arrive I shall also purchase a dremil and do the clutch fix although I didn't have any problems before it started slipping , but with the new plates it might rear it's ugly head and start dragging when cold ( had a sherco that used to do this !! very scary at times !! ) Thanks to all for the advice Phil Quote Link to comment Share on other sites More sharing options...
dan williams Posted January 26, 2014 Report Share Posted January 26, 2014 Let us know how you get on. Knowledge shared is knowledge multiplied. Quote Link to comment Share on other sites More sharing options...
thumper darryl Posted January 27, 2014 Report Share Posted January 27, 2014 Without having a machine to measure the springs and compare to new, you do not if they are good or not. All springs (including clutch springs) fatigue with use and need replacing from time to time. They are cheap, so just replace when replacing clutch plates. Standard practice for any good mechanic. 1 Quote Link to comment Share on other sites More sharing options...
dan williams Posted January 27, 2014 Report Share Posted January 27, 2014 DId he just call me a bad mechanic? Quote Link to comment Share on other sites More sharing options...
0007 Posted January 27, 2014 Report Share Posted January 27, 2014 LOL, maybe he meant Baaaad, not Bad Thumper the machine you refer to is not required Springs lose free length with age and use, they never lose rate Loss of free length means loss of preload which can cause slippage as there is simply less pressure on the pressure plate, simple So a micrometer is all a good mechanic needs, or a Baaaad mechanic Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted January 27, 2014 Author Report Share Posted January 27, 2014 Let us know how you get on. Knowledge shared is knowledge multiplied. Will do gladly Dan . I intend to change the plates some time this week and I have a trial to do this weekend so I will report then . Thanks Phil Quote Link to comment Share on other sites More sharing options...
dan williams Posted February 6, 2014 Report Share Posted February 6, 2014 Darryl, come back, I was just making a joke! Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted February 18, 2014 Author Report Share Posted February 18, 2014 Let us know how you get on. Knowledge shared is knowledge multiplied. Just thought I would report my experience with my clutch. The only reason I changed the plates was because they started slipping. So with my new plates , I did the clutch fix that Dan explains in great length on this forum.My clutch didn't drag at all previously but with the new plates altered as Dan explains, the difference is astounding!! It's now smoother than before with more 'feel', it doesn't seem to 'clunk' now between gear changes so all in all I'm well pleased !! Thanks Dan for your efforts !! Brilliant !! Phil Quote Link to comment Share on other sites More sharing options...
slicktop Posted February 19, 2014 Report Share Posted February 19, 2014 I was surprised to learn of the six availible settings of the Evo clutch. What circumstances would warrant changing the configuration of the clutch? Is the #1 (stock) setting the best for beginners? Quote Link to comment Share on other sites More sharing options...
dan williams Posted February 19, 2014 Report Share Posted February 19, 2014 First I've heard of it Slick. Quote Link to comment Share on other sites More sharing options...
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