what could cause it to shut down

[44oEX]

Well my friend has a 300ex and he drive along then it just quits. Sometimes it will just almost stall but it start up again and sometimes it just stalls. I starts up good after that. It's a stock 300ex except for a dirt bike start button and theter kill switch. He sayed he check all the wirering and it's good. the fuse is good and he cleaned all the ground. He has a new batery and the connection look good. I told him to change his sparkplug. It's probably not that but anyway. and it does this at any trottle posision. He might be able to go for like 10 min one time and 30 min the next time.

So what could cause it to just stall.

thanks

[mojoe2878]

i know you said he checked the wiring but it still sounds like he's got a wire on there thats loosing contact when hes riding. i would check the tether kill switch wiring again and the kill switch it self over again real good. it could be a bad kill switch.

[44oEX]

yeah that is what I told he but ye said that he checked and rechecked. I know it's a wirering but I need to know what part of the wirering.