08 600rr high rpm power loss and change in exhaust tone. - 600RR.net
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post #1 of 3 (permalink) Old 08-08-2017, 09:52 PM Thread Starter
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08 600rr high rpm power loss and change in exhaust tone.

So last week riding around at about 10.5-11k rpm the bike would lose power and i noticed a change in exhaust tone. The exhaust is kind poppy and gurgly, not exactly a backfire but not smooth. After searching around it seemed the fuel pump is common to go so I replaced that with a new oem one. Test drove it, initially seemed fixed but then once I had been riding for a bit it came back. Pretty stumped here, bike has 26k miles and is stock other than a slip on.
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post #2 of 3 (permalink) Old 09-02-2017, 09:18 AM
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Make sure your fuel line is not pinched. Since you've already replaced your fuel pump with a new one you'll need to confirm you have good for and fuel pressure.

Have you checked your air filter for rats nests?

If nothing else, find a dyno and have them run it a few times to see what your A/F ratio is doing.

Did you replace just the fuel pump? Or the entire fuel pump assembly? Was there any trash, debris, or fuel corrosion around the old fuel pump screen?

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post #3 of 3 (permalink) Old 09-10-2017, 09:04 AM
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I'd put the old pump back on and use injector cleaner and keep the rev's above 5.5k. Maybe time for a new battery if its over 1.5years old. I'd suggest a new air filter and possibly time for a valve adjustment if absolutely necessary.

2005 CBR600RR - bone stock
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