CBR 600F2 1991 - 1994 CBR 600F2

popping on decel.

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Old 07-22-2009, 02:30 PM
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when my bike is decelerating the exhaust starts popping from about 7000 to 5000 rpm, i hate it and it just sounds terrible, is this caused by timing being out?, if so how do u check the timing. thanks.
 
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Old 07-22-2009, 02:37 PM
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I am having the same problem. Trying to get answers out of some pro tuners on another board at the moment. It is either needle jets or pilot jets that are too lean.
 
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Old 07-22-2009, 06:27 PM
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i have the same issue but i never linked it w/ being crappy. but then again my car also does that..
 
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Old 07-22-2009, 11:10 PM
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well if either of u figure it out make sure u post it
 
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Old 07-23-2009, 12:05 AM
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Are you running an aftermarket exhaust? If so, the jets in your carbs are the wrong size.
 
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Old 07-23-2009, 02:34 PM
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Originally Posted by fsjeeper
when my bike is decelerating the exhaust starts popping from about 7000 to 5000 rpm, i hate it and it just sounds terrible, is this caused by timing being out?, if so how do u check the timing. thanks.
It's pretty much impossible for your bike to jump timing. The only way that would happpen is if the timing marks werent lined up on installation
 
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Old 07-23-2009, 03:30 PM
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check for exhaust leaks from your headers to the pipe. beyond that you are lean. Try turning pilot jets out in 1/2 turn increments.
 
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Old 07-24-2009, 02:49 PM
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i have a D&D aftermarket exhause on it, also i do have a small exhaust leak on the manifold right near the head. so this may be a cause?
 
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Old 07-24-2009, 06:33 PM
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Originally Posted by fsjeeper
i have a D&D aftermarket exhause on it, also i do have a small exhaust leak on the manifold right near the head. so this may be a cause?
Definitely
 
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Old 07-24-2009, 06:55 PM
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Originally Posted by Dissevered
Definitely
+1 exhaust leaks are the #1 cause for popping exhaust. If its bad enough it could even damage a valve.
 
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