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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve check-ever been tempted to re-shim the entire valvetrain?
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<blockquote data-quote="RossKean" data-source="post: 1150719" data-attributes="member: 19880"><p>+1 on the metric gauges. I'm likely to get a chance to try the shim-sanding with the next check (4 intakes were at minimum the last time). In addition to the ability to get better precision (whether or not it matters), once it is apart to determine which shims are needed I don't want to leave it that way while I go to the local dealer to see whether they have the needed shims in stock. Knowing my local dealer, they would be happy to order the ones I need and I would have them in less than a week! I thought about getting a shim kit and while the individual shims are cheap and cover a wide range, there are only a few of each of the sizes that are likely to be needed and only come in 0.05mm increments. As others have observed, the exhaust valves were all pretty close to the middle of the range - wonder if there is a reason for more apparent wear on the intakes? Also wonder how accurately Yamaha sets them at the factory.</p><p></p><p>Fred - how did you retract the blue-dot CCT and keep it from closing? I was thinking about leaving the screwdriver in place clamped with a small vice grip and/or duct tape. In addition to tie-wrapping the cam sprockets to the chain, did you do the same to the lower sprocket?</p></blockquote><p></p>
[QUOTE="RossKean, post: 1150719, member: 19880"] +1 on the metric gauges. I'm likely to get a chance to try the shim-sanding with the next check (4 intakes were at minimum the last time). In addition to the ability to get better precision (whether or not it matters), once it is apart to determine which shims are needed I don't want to leave it that way while I go to the local dealer to see whether they have the needed shims in stock. Knowing my local dealer, they would be happy to order the ones I need and I would have them in less than a week! I thought about getting a shim kit and while the individual shims are cheap and cover a wide range, there are only a few of each of the sizes that are likely to be needed and only come in 0.05mm increments. As others have observed, the exhaust valves were all pretty close to the middle of the range - wonder if there is a reason for more apparent wear on the intakes? Also wonder how accurately Yamaha sets them at the factory. Fred - how did you retract the blue-dot CCT and keep it from closing? I was thinking about leaving the screwdriver in place clamped with a small vice grip and/or duct tape. In addition to tie-wrapping the cam sprockets to the chain, did you do the same to the lower sprocket? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve check-ever been tempted to re-shim the entire valvetrain?
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