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Discussion Starter #1
Hi ,i have a 2005 Kawasaki z750
The problem is ,when i ride the bike and i go past 8500rpm the bike strarts to jerk ,as if there is not enough fuel .The rpm range from 8500 to 9000 at that moment and do not go above 9k ,The problem is happening from 2-6 gear (i didnt test gear 1) and there is no problem on neutral. And the bike rides perfectly below 8500 rpm.

I'm looking for suggestions to what to look for ,what to test and etc.
 

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At that high an RPM it could be a lot of things. Ignition, spark plugs, fuel etc. What is the service history on the bike? Have you owned the bike for very long? When did this problem start and what work was done on it recently? You could try running a fuel additive like Seafoam though it to see if that helps. I would pull out the spark plugs and have a look. If in doubt, replace them.
 
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