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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve Check Problem!
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<blockquote data-quote="Fred W" data-source="post: 1437648" data-attributes="member: 3828"><p>I should mention that conventional advice is to never turn the crankshaft backwards, but nobody ever tells you why. The reason not to is because the chain tensioner is on the chain between the crank sprocket and intake cam, if you turn it backwards at the crank you are pulling the chain tight against the CCT, which it is not designed for. It can compress which would create slack and allow the chain to skip teeth on the sprocket. </p><p> </p><p></p><p>However, when the CCT is already compressed and the chain is already intentional loose it is OK to turn the crank backwards or forwards a little to move the chain links on the sprocket to establish correct timing. Once you think you have the timing right, tension the chain and only turn forwards (CW).</p></blockquote><p></p>
[QUOTE="Fred W, post: 1437648, member: 3828"] I should mention that conventional advice is to never turn the crankshaft backwards, but nobody ever tells you why. The reason not to is because the chain tensioner is on the chain between the crank sprocket and intake cam, if you turn it backwards at the crank you are pulling the chain tight against the CCT, which it is not designed for. It can compress which would create slack and allow the chain to skip teeth on the sprocket. However, when the CCT is already compressed and the chain is already intentional loose it is OK to turn the crank backwards or forwards a little to move the chain links on the sprocket to establish correct timing. Once you think you have the timing right, tension the chain and only turn forwards (CW). [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Valve Check Problem!
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