Hello guys, im new to the forum. I was searching on internet for carb tuning and i found this site, and is very informative. Can you help me with jetting on my pitbike.
Motor is yx 140 gen3, motor has Hi-speed piston 56mm, z40 cam set, light port and polish not removed valve guides, 0.5 base gasket and 0.5mm cooper basket, daytona style ORK. Iam using 1/4 throttle and when i flick throttle hard it dies on me and i have from idle to 1/4 throttle stumble.
Jetting specs: 40 pilot 1turn out JJH needle 95 main.
Valve specs: 4in and 6 ex thou.
plug: cr7hix and its showing chokolate brown on electrode and tip.
Is my jetting off or its to small of a bore to handle 28mm ??
Motor is yx 140 gen3, motor has Hi-speed piston 56mm, z40 cam set, light port and polish not removed valve guides, 0.5 base gasket and 0.5mm cooper basket, daytona style ORK. Iam using 1/4 throttle and when i flick throttle hard it dies on me and i have from idle to 1/4 throttle stumble.
Jetting specs: 40 pilot 1turn out JJH needle 95 main.
Valve specs: 4in and 6 ex thou.
plug: cr7hix and its showing chokolate brown on electrode and tip.
Is my jetting off or its to small of a bore to handle 28mm ??