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FJR Motorcycle Forums
FAQs and Common Historical Info
Valve Checks vs. Adjustment Required Poll
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<blockquote data-quote="Fred W" data-source="post: 971636" data-attributes="member: 3828"><p>Thanks for the reply. Yes it does sound like your bike has valve lash all on the loose side for some reason. When I'm measuring the clearance I pretty much just go with whatever the largest size feeler is that I can even jam in there. They are pretty thin, so there's not much chance that you'll overcome the valve spring's pressure with a wimpy thin gauge blade.</p><p></p><p>As mentioned earlier, the general consensus is that these engines come out of manufacturing with the intakes at the lower end of the spec range and the exhausts about in the middle. I guess the only thing to watch on your bike is if the gaps are actually growing over time, which would indicate that you may be getting excessive carbon deposits on the valve seats and valve faces. If you are rider that doesn't get a chance to "open 'er up" too often you may want to consider using some sort of fuel additive to help keep the carbon in check (Yamaha Ring Free is highly regarded around here)</p></blockquote><p></p>
[QUOTE="Fred W, post: 971636, member: 3828"] Thanks for the reply. Yes it does sound like your bike has valve lash all on the loose side for some reason. When I'm measuring the clearance I pretty much just go with whatever the largest size feeler is that I can even jam in there. They are pretty thin, so there's not much chance that you'll overcome the valve spring's pressure with a wimpy thin gauge blade. As mentioned earlier, the general consensus is that these engines come out of manufacturing with the intakes at the lower end of the spec range and the exhausts about in the middle. I guess the only thing to watch on your bike is if the gaps are actually growing over time, which would indicate that you may be getting excessive carbon deposits on the valve seats and valve faces. If you are rider that doesn't get a chance to "open 'er up" too often you may want to consider using some sort of fuel additive to help keep the carbon in check (Yamaha Ring Free is highly regarded around here) [/QUOTE]
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FJR Motorcycle Forums
FAQs and Common Historical Info
Valve Checks vs. Adjustment Required Poll
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