u/Lucky-Fix563

Hi, i have a d50b0 engine in unkown condition, except that crank, bearings, cylinder etc is new. When driving it runs perfecr, except for smoking a lot, and not revving out for some reason / cutting ignition. Ive changed plug, main jet, cdi, reeds, fixed ground etc but still runs bad.

Ive added a video of it running, aswell as a picture of the sparkplug. If to any help, the water pump gear is broken aswell.

Thanks in advanve!