it is a friend of mine little girls quad. it dies when it has been running and warms up...it has new rings ..he cleaned the carb...still does same thing...he took it to a dealer...not good they have 3 of the same model working on them... said they had been working on 1 they said the people have more money in it than it is worth... i was wondering if it could be the coil...any guesses would be great.. any guess thank you curb

 

sometimes the box for the start function ofthe handle bar switch goes bad ,,or cdi , parts are the same as pw50.they are easier to find used

 

My son's 87 moto4 80 did the samething it was like it ran out of gas. so went to get the tow rope get back started right up ride for a few then die like no gas to the carb did the same thing clean the carb check the float still the same thing ride die . so i took out the airfilter and it ran and ran and ran so i cleand the airfilter and it works fine now good luck

 

I've been doing some research on a 60 Tri-zinger I'm trying to restore. One of the problems I've read about is the bike not running long/dying under load or when warmed up. After trying numerous other things, several people stated that they eliminated this problem when they cleaned the muffler. It seems that they tend to get sooted up and become restricted.