4 stroke bogging

socialdistortionkid

socialdistortionkid

New Member
Hey everybody i sold my 2 stroke grubee engine kit and bought a huasheng 142f engine kit and am loving it so far. The bike starts on the second pull cold and idles good. Ive broken in the engine with 2 tanks of gas. When im at a dead stop and i crack the throttle about 1/4 of the way open the motor sputters and will die, one pull start and it fires back up. If i give the bike 1/2 to WOT throttle it hesitates for half a second but then accelerates smooth from a dead stop it accelerates fine.

My guess is that the valves need adjustment, but im going to try a brand new spark plug and get back to you guys if that fixed it.

87 octane gas
110 pound rider
44 tooth sprocket
Can exhaust
 
Most likely it's your valves, but your fuel/air mixture plays a part in that, too. Try adjusting your air screw on the carb a half turn either way.

Mine used to sputter bad on part throttle when my valves were really loose. Ever since I adjusted them to .004/.006 most the sputter went away.
Got rid of the rest of it by drilling my carb jet out, as my plug was showing lean.
 
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