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Spark plug pics

Generally fuel related problems in lower rpm is to lean and in upper rpm too rich.


Exactly my issue as well. I know my Main and Needles are a tad rich but my low RPM seem to be too lean...thus slight sputter in and lag in the 2.5/3k range. Float height or mixture screw?
 
Exactly my issue as well. I know my Main and Needles are a tad rich but my low RPM seem to be too lean...thus slight sputter in and lag in the 2.5/3k range. Float height or mixture screw?
I'd try adjusting the screws first for highest idle before I did anything else.
 
I posted that the slight stumble was rolling on the throttle out of a corner.......however, it does the same when accelerating in a straight line without the bike leaned over. Never noticed a difference between the two.....:)
 
I posted that the slight stumble was rolling on the throttle out of a corner.......

I would think that the float height would cause this type of effect. Have you ever tried measuring the fuel level in the bowls by attaching a tube to the drain plugs?
 
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