Author Topic: GSX650F Strange misfire  (Read 792 times)

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GSX650F Strange misfire
« on: July 25, 2017, 09:47:09 AM »
Bike 08 GSX650f
Im experiencing a rather strange misfire which occurs mainly at higher loads and RPM.
The misfire tends to happen at 80% - 100% throttle, and is that bad that you will not accelerate
if you use slightly less throttle than where the misfire occurs you can rev it out to the rev limiter cleanly.
And the interesting thing is, say you cruise along in 1st gear at 6k, snap throttle open and it starts to break down. You can flick the kill switch on off and then get straight back onto the throttle and it will pull clean. After a variable amount of time the miss will return.

Ive replaced the voltage rectifier
Fuel Pump


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Re: GSX650F Strange misfire
« Reply #1 on: July 26, 2017, 08:56:21 PM »
have you tried changing the plugs ? sounds like a breakdown on the HT side to me.
The Blue ones are the fastest !