10+ year-old e50 build, mid upper 50smph, puch Polni 64cc kit,15mm bing, points ignition 14.25° before top dead center timing, tuned clutch with thing springs,
Build has 18k mph on original cylinder 30 k on bottom end in stock OEM bearings and seals but with preventative maintenance ring/piston changes,
And no junk type F fluid but 5w20 synthetic motor oil in tranny,
So many people put a kit on a bike run it for a few thousand miles then blow it up!
But that’s not me! nikasa/chrome bore cylinders to not go out of around like cast iron lined ones, you can get 20 K miles out of a kit if you change rings and pistons and you’re supposed with mileage recommendations,
I mean I keep up with 90-100 cc enduro bikes on streets (not dirt though) with a 40 year old maxi that has a 64cc puch Polini kit that was built 12 seasons ago,
there are so many dumies out here that don’t understand , pull your cylinder and check clearances 3 to 5kmi and change the parts instead of buying kit after kit after kit!