Have any of you guys had the problem of the bike hesitating when you snap the throttle in first gear from a slow roll. I've tried everything i can think of. I have a 2Brothers exhaust, dynojet kit and k&n air filter installed. Ive tried differant needle heights, differant idle screw settings and new spark plugs, but can not make it go away. Anyone had and fixed this problem?

 

I've got a GPZ900R that had a similar problem when I first bought it.

If I rolled the throttle on gently it would rev cleanly throughout the rev range. However, if I snapped the throttle open it would die for a second then rapidly pick up. This was a real pain when throttling on after a bend or on a roundabout etc. I tried allsorts to fix it including stripping, cleaning and balancing the carbs a couple of times but it still persisted. I changed the plugs, checked the valve timing, the compression, the pick ups, the coils, the leads etc, etc. I gave up in the end and lived with it for about a year. Then one day I decided to check the carbs again for blockages etc as I was sure it was fuel related. The one thing I had overlooked up to this point was the float heights. They were only slightly out but once adjusted made all the difference in the world. It was then a different bike to ride and was much more enjoyable.

Before you do anything, check your valve clearances.

 

Thanks for the info. Were your float levels high or low?

 

Float levels were low so the fuel was struggling to get sucked up until there was an open throttle. Hence the hesitation.

 

Thanks again dude, i'm gonna try raising my float level.