Motorcycle Repair: New carb for 50cc Zonghsen engine, lifan motors, sudco

Question
I have e-mailed you before on my carb problems for this ATV. It will die if you throttle up to fast,idle is OK high end is good. I have been told that a 19mm carb is to big for this engine and that it should be a 16mm. The intake is for the 19mm carb and that I would need a wide body 16mm Venturi carb. Can you suggest a carb and where I might find one. And do you agree. No adjustments have helped. How ever all these Chinese Zongshen and Lifan motors (Honda) knockoff's all ship with 19mm. I have not been able to find jets for the carb its supposed to a Kehine carb but does not show up on the webite it is stamped K W PZ 19 standard of Japan.

Thanks

Answer
Hi Steve,

Contact Sudco for tech assistance. "www.sudco.com"

"Keihin" is the correct spelling, respectfully.

I'm not sure series carburetor you have. I suspect the PWK series. I would need to see an image to help determine which carb model.

Sudco should offer some answers for you.

Respectfully,
Mark Shively