Question about 2008 Harley Davidson FLHRC Road King Classic

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Rattling coming from the primary - 2008 Harley Davidson FLHRC Road King Classic

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  • Harley Davidson Master
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Could be loose chain, most likely loose compensator.

Posted on Oct 18, 2014

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Posted on Jan 02, 2017

strech3030us
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SOURCE: 2008 Road King Classic, rattle from primary

I also have a 2008 Road King Classic that had a chain-like noise when running.

Starting in 2007, the touring bikes have a spring-loaded primary tensioner.
While good in theory, it's not a perfect science.

Try this:
In first gear, accelerate hard up to about 30 MPH.
Then get off the gas, and brake with the rear brake as hard as you can without locking up the wheel. Do this with the clutch engaged (clutch lever released) until it gets slow enough that you have to pull the clutch lever in to prevent a stall.

What this does is puts a load on the chain, tightening the top run, and giving maximum looseness to the lower run, where the adjuster works off of.
This (in theory) should take enough load off the adjuster spring so that it tries to tighten the chain to the next tooth on the ratcheting mechanism that prevents the adjuster from backing off.
If you notice a change of noise/condition goes away, that was your problem (and you'll know what to do next time you hear it).
If not, you might have to go into the primary cover and see what's up.

Posted on Sep 13, 2013

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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.

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Check oil level.

Get M/C shop to check......alot of good money at stake there.

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