03 Raptor idles but won't rev
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03 Raptor idles but won't rev
did you check the parking brake sensor on the clutch perch? With yamaha the parking brake sensor is the cause of the problem you described most of the time. Try wiggling the sensor around, and if that doesn't fix it try unplugging it from the harness. I think there's 2 sensors on the raptor's stock clutch perch, and the parking brake sensor would be the one closest to the front of the quad.
#4
03 Raptor idles but won't rev
Originally posted by: Rogeraptor
Has anyone run into this? I've got an 03 Raptor, it idles fine but as soon as I hit the throttle it just farts and backfires, it sounds like it's electrical, any suggestions.
Thanks
Has anyone run into this? I've got an 03 Raptor, it idles fine but as soon as I hit the throttle it just farts and backfires, it sounds like it's electrical, any suggestions.
Thanks
Thank you
Kory
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#6
03 Raptor idles but won't rev
Spitdirt has a similar message string. If it's an actual stall and not running rough, it could be a very common raptor carb problem. (Quote from other string) Your 660 is equipped with twin Mikuni BSR CV carbs. They work ok, but it doesn't take much to screw up their circuit. On your carburetors, the throttle cable actuates a butterfly valve and, as the throttle is opened, the air pressure difference between the sealed chamber above the vacuum slide and inside the carburetor venturi forces the slide (located in front of the butterfly valve) up and down. This will NOT be a factor at idle, only when you press the thumb throttle. See if either of the hoses connected from the top of the carbs to the intake manifold have disconnected or are blocked. They are not clamped, so one or both may have issues. Good luck.
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