Hello,

I have a 34mm round mikuni carb on my bike. The bike idels great put as soon as you punch it the bike will bog out and kill the motor. Does it every time. If you are at 1/4 throttle and punch it no problem. The carb has been completely clean. Can someone help me out?

 

Sounds like it might be your main jet what's the carb on

 

did you buy the quad used? did you put that mikuni carb on it? it may be the wrong jet. hmmm......let me think a little bit.

 

The bike is used and came with this carb on. The carb is on a 250 kazuma falcon 250. I was thinking I needed to go up on the pilot jet size? I believe the main is a 200. Anything about 1/4 throttle is runs good. If you stab the throttle when at idle it bogs right down and will kill the motor.

 

Yeah that could be it just make sure it's super clean

 

agreed....so when you say the carb was cleaned, the jets were pulled out and you can see daylight through all of the orifices and down the center of the jets? the needle valve/seat is thoroughly cleaned and the float actuates just fine with the valve? no hangups? right?

 

The 34mm mik round side is a super popular carb for both two strokes and 4 strokes buy a rebuild kit with the right size jets you can never go wrong with that I also buy 2 sizes up and down for both jets

 

Took the carb totally apart, all parts removed. Replaced the pilot jet with a 45 and the main with a 210. Better but still have some issues. Also changed out the weights from 21 grams to 15 grams and that made a nice change in lower end take off

 

Ok did you replace the needle jet actually dip the carb and blow everything out

 

yes