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Old 04-16-2014, 05:48 PM   #1
Colorado_Rider OP
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What's wrong with my bike?

Honda 919, rattle is not as loud when warmed up, but notice how it gets better when the throttle is blipped. Already opened it up and everything's tight. Definitely coming from the alternator.

https://www.youtube.com/watch?v=YUui...ature=youtu.be
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Old 04-16-2014, 05:57 PM   #2
darkstarmoto
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Cam chain my guess, it gets quieter when you rev the engine because the slack is pulled tighter.
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Old 04-16-2014, 06:14 PM   #3
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Hmmm maybe. When I put my ear to the stator it gets real loud at idle that is. Bike only has 12K on it.
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Old 04-16-2014, 07:05 PM   #4
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I watched it on my phone so the audio wasn't great but I would say it sounds like the starter one way (sprag) clutch is going bad.
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Old 04-16-2014, 07:08 PM   #5
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It's much worse on the side in the video where the starter is, not the side with the CCT.

How do I fix it? There's only 12K on the engine
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Old 04-17-2014, 07:25 AM   #6
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Type "919 cam chain noise" into your favorite search engine....I found many posts about the issue. There's even a couple videos that have a distinct similarity to the sounds you recorded.
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Old 04-17-2014, 08:01 AM   #7
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That makes perfect sense but why would the rattle be so much worse on the left side?
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Old Yesterday, 07:31 AM   #8
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There is a reason all the Honda V4's had gear drive cams for years... Honda cant build a CCT worth a ****
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