ok, my freinds 78 maxi (just got on friday) starts up great, runs great at first beautifully for about 2 mins, then it just stalls when i go faster then 25 for longer then a minute. when it stalls and i turn the throttle, it turns off compleatly. but if i dont touch the throttle when it starts to stall and let it go, it stays at the speed it is at, but then if i turn the throttle again, it stalls compeleatly out. i checked the carb compleatly and the cylander and the piston/rings, they are fine. i adjusted the idle, throttle cable, and checked the gas tank for any random chunks of something, it is fine. gas line is clean, petcock is clean. i have tryed 2 different spark plugs, same result each time. i am thinking it has to do with the timing (magneto??)
any ideals people??!!
thanks alot for your time, please type back asap.