Sorting out my "Pexmor" 49 cc motor...

[DAMIEN1307]

Richest setting, and yes, after it cooled down.

So, all the way to the bottom? To do a proper plug reading you have to ride the bike under load for at least 5 minutes after it is warmed up. Then kill the engine, don't let it idle down, coast to the side and pull your plug. Bring some gloves, it'll be hot.

And hopefully running a 20:1 fuel/oil mix ratio during breakin period.

 

[markjs]

And hopefully running a 20:1 fuel/oil mix ratio during breakin period.

I went with 25:1 since I only have one can for both bikes. I guess I'll probably get a jet kit. maybe one size bigger and I can squeeze another half a horsepower out of it.