February 2, 201610 yr Hi guys Apologies if anything I say is daft I don't have huge amount of mechanical experience so bear with me! I had the clutch replaced on my 2012 Pro Racing 280 a few months back. Since the new install the clutch lever is really stiff to the point where I'm getting really fatigued after short period of riding. Actual engagement and bite is great no slip at all and perfect for short run up stuff. I took the clutch out and measured the following: Plate 1: 1.4mm Plate 2: 1.5mm Total width: 10.21mm I understand it should be 9.75 - 9.80? I'm also aware I can get 1.3mm plates but that only brings me down to 10mm. Basically I'm after a lighter clutch so I can ride through sections without getting hand / arm pump on clutch side! I do want to be able to do fairly aggressive short run up stuff though so maybe 10mm will be correct balance? Fitness isn't an issue I ride a lot and never have an issue on any other bike. Any help / advice would be great. Thanks James
February 2, 201610 yr I think there is a range of different size plates. I did mine and it's as light as a feather with the right size pack and clutch adjustment. Cheers Taff
February 2, 201610 yr Not to be an ass, but, reading some other topics about the clutch might help out a lot. But you are on the right track, those measurements are really really important Also search for finger hight! Edited February 2, 201610 yr by crazybond700
February 2, 201610 yr Author Cheers guys. I have done a lot of research already before I knew absolutely nothing!! Basically from everything I have read you can get 1.3mm, 1.4mm, 1.5mm, 1.6m, 1.8mm spacers. Your meant to use combination to hit the optimal 9.75mm - 9.85mm total width. The thicker the pack the harder the clutch lever will be. The reason I posted was because by my basic maths no combination of spacers i.e. 1.3mm x 2 will give me that measurement - hence my confusion! Any further advice would be great. Cheers James
February 2, 201610 yr If you put in two 1.3's your under 10. Again first search finger hight, its also very important (maybe even more). I can explain it here, but has been done before (often) so I dont really see the point in that. To help you a bit on the way read e.g http://www.trialscentral.com/forums/topic/46534-pro-clutch-friction-plate-challenges-current-oem-clutch-packs-are-too-thick/?hl=%2Bfinger+%2Bheight#entry338662 Dont get confused too much, but measure and tell us your fingerheight (and see drawing in topic for how this is measured). Edited February 2, 201610 yr by crazybond700
February 2, 201610 yr https://m.youtube.com/watch?v=hjoj7n74G0s Watch all three or all of his vids and your bike will be perfect
February 2, 201610 yr On ebay you can buy a surflex clutch kit that has a number of steels of varying thickness so you can get the completed thickness you want. I had the same problem on my 014 racing, purchased the kit and all good now. I also bought a digital vernier to get the measurement spot on. If you are using the standard fibre plates there is one that is slightly thicker and this one must go in first. Cheers Greg
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