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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Effects of valve wear in relation to valve adjustment
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<blockquote data-quote="C5Performance" data-source="post: 138627" data-attributes="member: 2938"><p>I think it is fine to use cars as an example. I agree that modern materials reduce service intervals to an amazingly long time. </p><p></p><p>Please allow me to use a another "non Honda" example. </p><p></p><p>Yamaha recommends first valve adjustment on their R1 motorcycle at 26,600 miles. The same engine is used in the Apex snowmobile with recommended inspection at 25,000 miles. This is an engine that runs just under 11,000 rpm for well over 75% of its life. </p><p></p><p>It is difficult to imagine this since my Ural gets adjusted every 1,000 miles and never exceeds 5,000 rpm. </p><p></p><p><strong>Now to really blow your mind:</strong></p><p></p><p>If your Apex averages 10,000 rpm then your engine is turning 600,000 revs per hour. </p><p>Assuming you run an average speed of 40 mph it will take 625 hours of run time to accumulate the 25,000 miles needed for the FIRST valve adjustment. </p><p></p><p>625 hours x 600,000 revolutions per hour = 375,000,000</p><p></p><p><strong>That means your crankshaft rotated 375 MILLION times at 10,000 rpm before you reached the first valve service. </strong></p><p><strong></strong></p><p></p><p>How's that for reliability?</p></blockquote><p></p>
[QUOTE="C5Performance, post: 138627, member: 2938"] I think it is fine to use cars as an example. I agree that modern materials reduce service intervals to an amazingly long time. Please allow me to use a another "non Honda" example. Yamaha recommends first valve adjustment on their R1 motorcycle at 26,600 miles. The same engine is used in the Apex snowmobile with recommended inspection at 25,000 miles. This is an engine that runs just under 11,000 rpm for well over 75% of its life. It is difficult to imagine this since my Ural gets adjusted every 1,000 miles and never exceeds 5,000 rpm. [b]Now to really blow your mind:[/b] If your Apex averages 10,000 rpm then your engine is turning 600,000 revs per hour. Assuming you run an average speed of 40 mph it will take 625 hours of run time to accumulate the 25,000 miles needed for the FIRST valve adjustment. 625 hours x 600,000 revolutions per hour = 375,000,000 [b]That means your crankshaft rotated 375 MILLION times at 10,000 rpm before you reached the first valve service. [/b] How's that for reliability? [/QUOTE]
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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Effects of valve wear in relation to valve adjustment
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