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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve cover leak, looking for some help in northern Colorado
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<blockquote data-quote="RossKean" data-source="post: 1458277" data-attributes="member: 19880"><p>Glad you got it sorted out!</p><p>FWIW, I make very careful initial measurements using a decent set of metric feeler gauges, calculate and install the shims and put it back together - once. Valve clearances have always worked out very close to the calculated value without having to take the cams off again and try a different shim. My only problem was screwing up the cam timing by a tooth. I didn't notice at the time but it became obvious when I started the engine and it didn't run decently. If you get it off more than a couple of teeth, you could conceivably wreck the engine when you attempted to start it. </p><p>This happened on my most recent valve adjustment and I have no idea what I did differently. For the next time I need to adjust, I am going to put alignment marks on the inside of the cam gears. I find it too difficult to accurately line up the marks - even with a bright flashlight and an inspection mirror.</p></blockquote><p></p>
[QUOTE="RossKean, post: 1458277, member: 19880"] Glad you got it sorted out! FWIW, I make very careful initial measurements using a decent set of metric feeler gauges, calculate and install the shims and put it back together - once. Valve clearances have always worked out very close to the calculated value without having to take the cams off again and try a different shim. My only problem was screwing up the cam timing by a tooth. I didn't notice at the time but it became obvious when I started the engine and it didn't run decently. If you get it off more than a couple of teeth, you could conceivably wreck the engine when you attempted to start it. This happened on my most recent valve adjustment and I have no idea what I did differently. For the next time I need to adjust, I am going to put alignment marks on the inside of the cam gears. I find it too difficult to accurately line up the marks - even with a bright flashlight and an inspection mirror. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve cover leak, looking for some help in northern Colorado
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