I've disassembled the decompressor assembly on the camshaft of my 92 XR600R. The shop manual doesn't make sense when it describes how the one way clutch outer rotates in one direction only. As far as I can see, the one way clutch outer is locked to the reverse decompressor cam and the whole thing is free to rotate either way. There doesn't appear to be any mechanism that would make it one-way. Any explanations? Mike.