Okay I have asked about this some before but I have made new obsevations this weekend. I have removed exhaust and intake restictors, opened up the air box, moved needle up one notch and taken out the piggyback jet. When I had the carb apart I cleaned it and reamed out the main jet with a .022" jet drill. I couldn't measure the orafice but i'd guess it was opened up about .005". Now, it runs great. Plug looks kinda light rust color. But when the kids let off of the gas an take a hard banked corner or hill and the try to stab the throttle again it stumbles bad and sometimes dies. It will usually start right back up. I am thinking float level???? Is there an adjustment for this?
I can watch them ride and predict almost every time when it is going to act up by the amount of throttle they are at and the pitch of the slope the quad is on.

Anyone?

 

I checked and I am getting good sparkage.

 

so its cutting out and dieing at around full throttle or when the quad isn't sitting even, like on hills like you said? Because if thats the problem i would say float level to except i dont know of you can adjust the level on those little things.

 

by the way, how much power did you get out of doing all of that to it???

 

It cuts out if they are hard on the throttle, and let off for a hard banked corner, when they get back on it. I thought the same thing. Maybe I can bend it up or down to adjust it. As far as how much power I gained... I don't have dyno results or anything, but it revs higher and quicker. I weigh about 280# and it moves me around pretty good now. I'd say 50 % gain would be fair.