It could be the cam decompression, If it sounds like it wants to start when you keep pumping the throttle then that's your problem. I had that happen to my 400EX.
It could be the cam decompression, If it sounds like it wants to start when you keep pumping the throttle then that's your problem. I had that happen to my 400EX.
87 TRX310R
87 TRX370R
85 YZ125 Resto
85 YZ80 Resto
85 ATC70
00 TRX416EX