crazybond700 Posted May 10, 2016 Report Share Posted May 10, 2016 In the original pack the friction plates differ, and then the first one to go in is the thickest. However I dont really understand why. But if they are the same it should work in my opinion. Quote Link to comment Share on other sites More sharing options...
smarty156 Posted May 10, 2016 Report Share Posted May 10, 2016 I think because the first friction plate has to sit in a lipped clutch basket. If the friction plate wasn't thick enough it wouldn't touch the bottom and you'd lose some of the clutch grip. All the Surflex friction plates are 2.3mm so no need to get the right one at the bottom like the original plates. Although maybe the newer plates are the same too? Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted May 11, 2016 Report Share Posted May 11, 2016 I think because the first friction plate has to sit in a lipped clutch basket. If the friction plate wasn't thick enough it wouldn't touch the bottom and you'd lose some of the clutch grip. All the Surflex friction plates are 2.3mm so no need to get the right one at the bottom like the original plates. Although maybe the newer plates are the same too? That would make sense. Quote Link to comment Share on other sites More sharing options...
baldilocks Posted May 12, 2016 Report Share Posted May 12, 2016 I think when I did mine the pack thickness was correct but the finger height wasn't. I don't understand how that can be the case ? Quote Link to comment Share on other sites More sharing options...
baldilocks Posted May 17, 2016 Report Share Posted May 17, 2016 Its ''easily'' fixable. You need to set the pack thickness and the fingerheight spot on and it will work just fine. Crazybond my clutch pack is 9.85 but the finger height us only 16mm ? Packt hickness +- 9.75 to 9.85mm Finger height aim at 17,5mm Also check play on the lever should have arround 3mm of free play. Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted May 18, 2016 Report Share Posted May 18, 2016 (edited) Yes that could be the case. I would say the fingerheight is more important than the pack thickness. Also the levers can be bend, spring could be worn etc etc. With 16 it should work, but probably a heavy clutch. There are guys making true academics of it. https://www.facebook.com/2011trproduct/?fref=ts https://www.facebook.com/trproduct?fref=ts Edited May 18, 2016 by crazybond700 Quote Link to comment Share on other sites More sharing options...
smarty156 Posted May 22, 2016 Report Share Posted May 22, 2016 Ok. My clutch is still slipping in 5th and 6th. This is after a new clutch pack all measured to correct thickness, finger height spot on and oil changed twice (Putoline Light Gear Oil as recommended by Factory Kev at GasGasUK). Clutch lever is lovely and light. Was at a very muddy trial today, lots of 3rd gear clutch slipping (deliberate) and blasting with no issues at all. It's just in 5th and 6th. Any ideas? Quote Link to comment Share on other sites More sharing options...
lineaway Posted May 22, 2016 Report Share Posted May 22, 2016 You could see if Kev has one of the original springs. (2002-05) It would be a slightly harder pull, but would eliminate slip. Quote Link to comment Share on other sites More sharing options...
smarty156 Posted May 22, 2016 Report Share Posted May 22, 2016 I've just emailed him to see what he thinks the problem is. Quote Link to comment Share on other sites More sharing options...
smarty156 Posted May 23, 2016 Report Share Posted May 23, 2016 Kev thinks the clutch pack isn't thick enough now, which makes sense. Maybe my measuring skills with a vernier caliper just aren't very good! Will take apart again and re-measure, putting in a thicker steel plate to see what that does. Quote Link to comment Share on other sites More sharing options...
baldilocks Posted May 23, 2016 Report Share Posted May 23, 2016 (edited) Smarty two things I have learned recently which may help. First of all new plates bed in .1 to .15 mm on first use so if you are setting it up at 9.75 it will be out of spec after the first trial. Two, are the steel plates brand new ? I swapped plates from an old set to get the right thickness but the clutch slipped. When I stripped it again one of the steels was worn on the underside so I think unless the fibres where lined up perfectly with the groove in the steel plate any measurements I took were incorrect. Changed steels clutch is now perfect Edited May 23, 2016 by baldilocks Quote Link to comment Share on other sites More sharing options...
smarty156 Posted May 23, 2016 Report Share Posted May 23, 2016 It was slipping the first time I rode it so they didn't even have a chance to wear. Yes, the steel plates are all new. I'll take it out and re-measure. I have a digital vernier gauge now which should make it simpler to check. Quote Link to comment Share on other sites More sharing options...
smarty156 Posted May 24, 2016 Report Share Posted May 24, 2016 (edited) So I've worked out either I can't read a manual vernier caliper correctly or its just wrong. The digital vernier caliper I now have gives a different reading and the clutch pack is indeed too thin. I'll swap one of the steel plates for the next thickness up (which came in the Surflex pack) and this should solve the problem. Edited May 24, 2016 by smarty156 1 Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted May 24, 2016 Report Share Posted May 24, 2016 Often the manual ones go per 0.5 per complete rotation not 1. Maybe something went wrong there? Quote Link to comment Share on other sites More sharing options...
lineaway Posted May 25, 2016 Report Share Posted May 25, 2016 Jim Snell has redone his clutch video. https://www.youtube.com/watch?v=gnLY1IrMvBM 1 Quote Link to comment Share on other sites More sharing options...
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