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Desmo DIY Valve Shim Spin and Next Steps Questions

4.5K views 17 replies 7 participants last post by  dukaboy  
Sanding? Why not buy the next down shim? If you're going to keep the bike go ahead and buy a large shim kit. I find removing the timing belts makes doing the desmo service much easier. If you're truly defeating the springs and you're getting a zero measurement on the closer shims, and this has been a running engine, then they do not need to be touched, they are good.