My friend GPR problems??

[Tanny]

Hey fellas my friend is having some problems with his GPR he carry it to a mechanic down here to change out the rectifire they taught it was a firing problem but still the same problem it rolling over sometimes it starts but when the buzzer come on that is it wont start again. His GPR is running premix so he disconnected the oil so he was telling me that the sensor could be throwing it off?? and not letting it start?

thanks for input on this.

[Rocketman]

Temp sensor in the bottom rear of the pipe is bad.