Question about 1979 Harley Davidson XLH 1000 Sportster

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RANDOM CLACK FROM TRANS/ENGINE CASE - 1979 Harley Davidson XLH 1000 Sportster

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Have you checked the tension on your primary chain lately. The chain should be adjusted to have 3/4 to 7/8 inch up and down movement when the engine is cold.

Remove the top primary plug and you can reach in with your finger and lift the primary chain up and down. The adjuster is on the bottom of the primary cover. Loosen the nut and using an allen wrench adjust the tension on the chain. Screwing the screw inward tightens the chain, outward loosens it. Do not tighten the chain too tight. As the engine warms up and expands, the chain will become tighter. If you get it too tight, it could cause damage to other components.

If you don't think this is the problem, repost and we'll try something else. If you feel comfortable pulling the primary cover off, you might want to check for a loose engine sprocket nut. I've seen them come loose on many occasions. If you pull the primary, disconnect the battery. You' may need all your fingers in the future. Good Luck

Posted on Oct 05, 2009

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Posted on Jan 02, 2017

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