Hello guys! Excuse me in advance for my bad english, I'm from Ukraine & it isn't my native.
A week ago I became an owner of second-hand (or may be even third or fourth hand))) WR450FY '09. I have many things to do with it (wheel bearings, rear shock bearings, bended exhaust pipe,) but it is running good, starting not bad and i believe it is alive. Now the most serious problem for me is clutch.
I've read this topic and also other topics concerning WR450 clutch issues, including lever-drilling mods, but this topic described mod, provided by ThumpMe, looks like real working, from feedback. I am going to do this mod, but my clutch problem is a bit different from all i've read about.
My issue is: clutch pull is very short and is situated on first 1/3 of lever travel. May be, the pull is a bit heavy, but the main problem is shortness of it - about 2 mm of lever travel between clutch on & off positions. The remaining 2/3 of clutch lever travel up to bar could be released without any clutch reaction, clutch is working only at the top. At the same time, clutch lever has 1-2 mms of free play. Also, I can stay on a gear with pulled clutch and bike is not moving forward, I can start it on a gear with clutch pulled (E-start on a gear is not as easy as on neutral, but real), but the problem with short clutch pull does not allow me to play with clutch to dose it precisely when I am riding through the obstacles and technical terrain (it is 80% of my riding). Training double-clutch and whellie is also complicated with these short pull, when you cannot use clutch from little to more, just on/ off (I hope it will be clear what I am talking about).
Also, It is almost unreal to find neutral when bike is hot ans engine running, and easy when bike is cold.
So, may be someone had similar issue? Where should I start from? I need more wide range of clutch pull between it being engaded/disengaged. I have aftermarket zeta clutch lever/perch (not cp model with adjustable pull), new clutch cable, still dont know what plates/springs installed and what their condition is, but I think they are stock. May be, warn friction plates are the issue?
Edited by Markin, November 09, 2015 - 02:34 AM.