Question about 1999 kawasaki ZR-7

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Bike runs brill but at 6 to7 rev no matter what

Bike runs brilliant but at 6 to7 rev no matter what gear or if static sounds like a gazzo. after 7 tho revs it goes. i think it may be an air leak. did have air box of to clean and clean filter. doesnt affect proformance at all. any ideas ta.

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Iv'e found that when you have a problem at a certain rpm in any gear it's a spark plug ploblem. you can either take out your plugs and make sure they're all gapped the same, or install new ones making sure they're all gapped the same before you put them in.

Posted on May 18, 2010


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Posted on Jan 02, 2017


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Please take time to rate me

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1 Answer

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mate,  I have this exact same problem and have had it for the past 2 years!! I've taken the carbs to pieces and stripped down the whole bike and couldn't find the problem, however today I think I've got it. I reckon it's the charging system not working to it's full potential. I've found out that my regulator rectifier is knackered and that the alternator was only charging on 2 phases instead of three. IMHO this would be enough to keep the battery charged but not enough to supply high power demands. What i would do is check your charging system. 

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