I have 660 raptor installed a new motor and transmission, and a new carabertor unit
It starts very good runnes good, after you run it hard it stops and will not start again is it the wireing or other problems ?

 

Did it do this b4 you put the new motor in?

 

no it didn't because he busted the piston blow the motor up so we got another motor change the carbaretor jusr jetted the carbertor

 

did you check and adjust the valves on the new motor? When it stops running you need to determine if its getting fuel and spark. Have a spare plug with you and when it stops you can pull the plug boot and put the spare plug in and see if there is spark. If there is spark then you need to see if it is getting fuel. could be a plugged fuel filter.