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Message: <blockquote data-quote="ekvh" data-source="post: 155591" data-attributes="member: 1179"><p>Sync carbs as slab says, then put in earplugs and they sound much better.  The test to be sure it is primary chain is to put in gear, release the clutch enough to put a little load on it and see if it quiets down. If it does it's the primary chain or ----am guessing--- the chain to the oil pump could make a bit of noise too. By putting a load on it, you're taking the slack out of that chain. Many bikes do it and 75-77 were worse. Some time in the 77 run Honda made thicker castings in the block to help it. The fix is a new chain and involves splitting the cases which makes it cost prohibitive.</p></blockquote><p></p>