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Old September 8th, 2013, 11:53 AM   #18
Motofool
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Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

Posts: A lot.
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Quote:
Originally Posted by Panda View Post
Couldn't he spit on the exhaust? Each cylinder vents into a separate header right?
Yes, same thing, this is a pre-gen.

I believe that the OP has a complicate problem or group of problems and little experience to troubleshoot it effectively.

The only way to do it is testing and eliminating possibilities systematically.

I have insisted on the misfiring because the engine is exceptionally weak while not fully bogging or dying, although I may be wrong and other important factors as carburetor, electrical, valves or compression may be making some contribution.

A experienced rider may be able of detecting the problem(s) easily by just observing how the bike sounds and behaves.
This is OP's first bike; it is very hard for him to know what is going on.
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