Question about 2000 Harley Davidson FXDWG Dyna Wide Glide

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Ocassionally rattling on start up and durring throttle release

Starts up sometimes rattling. Also, when thottle is released. Sounds as if it is coming from the crank case but can't be sure. I did a lot of riding yesterday (over 120 miles) also in Houston, TX area. Could heat be related? Recently had the top end re-built at Republic Harley in Stafford, TX. The bike is an 88 cubic inch 2000 Harley Dyna wide glide. Air cooled and carb not fuel injected. I typically let it warm up 2min before riding. I start it with the choke out in neutral and leave the choke out for 2min or more. Then I get on it and go. Any thoughts?

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  • Dustin Kacal Jul 13, 2010

    OK, the chain was loose. We drained the primary adjusted the chain tension and added a quart of fresh ol to the primary. The rattling comtinues. While we had the bike running we could definitely feel that the rattling noise is coming from the primary. Any other thoughts?

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It sounds to me like the primary chain may be rattling. When you start the bike, the engine is cold and the chain is at it's loosest. As you ride, it tightens up as the engine cases heat up and expand. But, when you let off on the throttle, the slack in the chain goes to the top run. This causes the chain to "lift" off the small engine sprocket. If it is loose enough, it will hit the top of the inner primary housing on the inside. Check the tension of the primary chain. It should be 3/4" to 7/8" when the engine is cold.

I'm sorry that this is about the best I can do since I'm not in a position to hear the noise for myself. It's a "best guess" check this situation. I ride a 1994 FXDWG and I love it. Just turned over 30K, no major repairs.

Good Luck
Steve

Posted on Jul 11, 2010

Testimonial: "Thanks for the info, will check on it. Friend has service manual for which is a 99 so it should be the same, I hope."

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