I bought my eldest sone one of those Chinese PeeWee 50 knockoffs for\nChristmas. It's an _exact_ copy of the Yamaha variety, and is apparently\nmade by the same company that Yamaha uses to build theirs (Jianshe). On\nSaturday, in 30 degree heat, the engine seized.\n\nOnce it cooled down, I was able to turn it over again, and it seems like\nthere's still plenty of compression (it starts and runs same as ever), so\nI'm hoping that not too much damage has been done to the bore.\n\nThe bike has an oil pump which injects the 2-stroke oil. Following the oil\nfeed hose, I have locaed the regulator control (is controlled via a\nsecondary cable, activated by the throttle, so more throttle=more lube)\nremoved a cover and found an adjusting nut/blot which should allow me to\nincrease oil flow (I have always suspected it's been a bit on the light side\noilwise).\n\nHas anyone had any experience with either a clone or a genuine PW50 in this\narea. The owner's manual simply says "Autolube Pump - Check/Adjust/Air\nBleeding" every 6 months. Not a lot of help really. Does anyone know how\nmuch to move the adjuster? Is it just a matter of running the bike while\nadjusting it, and seeing how much smoke comes out? If the plug fouls all the\ntime, then wind it back in a tad?\n\nI'm hoping to learn of a more scientific approach.\n\nI guess my other option is to disconnect the oil pump, and self-mix the\nfuel. Probably a safer bet...?