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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve check... Should I leave well enough alone or dig in
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<blockquote data-quote="hppants" data-source="post: 1387727" data-attributes="member: 27852"><p>Use a set of "go/no-go" feeler gages. Takes the guess work out of it. One man's "loose 6" is another man's "6" and yet another's "tight 5"</p><p></p><p>I also firmly believe that Yamaha set the interval with specific things in mind. Noteworthy is the fact that if you check is within spec, it can go 26,000 miles and not tighten up to the point of engine failure. So for example, let's hypothetically discuss one of your #2 exhaust valves. I use that example because the exhaust side gets hotter and the inner cylinders likely get the hottest. If one of your #2 exhaust valves goes with the 0.007" go/no-go feeler, then it's good for 26,000 miles. Period. Forget trying to loosen it up while you are in there. Don't fix something that isn't broken. Leave it alone, next time you will likely be getting into it (and perhaps others).</p><p></p><p>I didn't make this revelation up. I'm no where near that smart. I was told this by a Yamaha dealer tech with 25 years experience on Yamaha motorcycles.</p><p></p><p>Now, this method only works if you stay reasonably close to the 26K interval. Which is why it's time for you to check them now, and follow the prescribed interval.</p></blockquote><p></p>
[QUOTE="hppants, post: 1387727, member: 27852"] Use a set of "go/no-go" feeler gages. Takes the guess work out of it. One man's "loose 6" is another man's "6" and yet another's "tight 5" I also firmly believe that Yamaha set the interval with specific things in mind. Noteworthy is the fact that if you check is within spec, it can go 26,000 miles and not tighten up to the point of engine failure. So for example, let's hypothetically discuss one of your #2 exhaust valves. I use that example because the exhaust side gets hotter and the inner cylinders likely get the hottest. If one of your #2 exhaust valves goes with the 0.007" go/no-go feeler, then it's good for 26,000 miles. Period. Forget trying to loosen it up while you are in there. Don't fix something that isn't broken. Leave it alone, next time you will likely be getting into it (and perhaps others). I didn't make this revelation up. I'm no where near that smart. I was told this by a Yamaha dealer tech with 25 years experience on Yamaha motorcycles. Now, this method only works if you stay reasonably close to the 26K interval. Which is why it's time for you to check them now, and follow the prescribed interval. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve check... Should I leave well enough alone or dig in
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