22mm Keihin carb issues

[Timmahhhhh]

I have installed a cheap Chinese Keihin 22mm slide carb on a 212 Predator with a header. It starts and idles okay,and from low to mid rpm it goes fine-but it doesn't like full throttle. It starts to hesitate and stumble. Could it be just the cheap carb-or should I adjust the needle setting? Thanks for any help.

 

[ole4]

Full throttle is a function of the main jet. Try going richer.

 

[Timmahhhhh]

Thanks ole4!!!! I moved the needle down to just under the middle setting. That seemed to do the trick. Now it'll take full throttle-but I don't often do it-it's a bit of a handful.....But more seat time will help. Here is the final (I hope) version.

 

[ole4]

that fattens up the midrange but 3/4 to full is main jet, the needle is out after 3/4 throttle.