ok, so i got that new upgraded carb from simpsonmotorbikes, ran great, the fit between the manifold and the carb was pretty loose, so i put some shim in there today, ran better. Now, I've tried e-mailing him, but no reply to where the air adjustment screw should be, because there is one on this new carb. haha, NO IT'S NOT THE IDLE ADJUSTER!!!! muah ha ha.... so anyway... so i rode it around this morning, ran ok, not great like it used to, so anyway, the throttle cable is coming apart, the inside of the rubber tune thingy is coming out, so i had to kinda re-rig it, i still have no clutch cable, my airfilter is broken, has been for about 3 weeks, the rubber boot broke, and again, i tried e-mailing simpsonmotorbikes, ...no reply from them... so anyway, my rear rim has been warped for ... well, since i put on the sprocket, and it's warped so much it sometimes rubs on the drive chain. So, back to the engine, when i start it up when it's been sitting a while (long enough for it to cool down), when i ride it down the street while it's still cool, it runs GREAT! but when it warms up, it runs like sh*t. I don't know why. I've tried adjusting the carb, no improvement. I'm thinking maybe i ought to check the muffler. I haven't taken that apart yet since i've got the engine, and i have roughly 400 miles on it, running a 20:1 gas/oil mixture. It also seems to purge at "high" (as fast as it will go when running sh*tty) speed, and i know a lot of you are thinking GASKETS, must be the gaskets, but nothing is leeking, i've tightened everything, but not too tight. so what do you think? i've lost ALL of my hill climbing power, and pretty much any power i once had. new spark plug is in, also. it's harder to start it.. so again, what do you think?