450R Problems!! Please Help

[gnhmoto]

I have an 07 450R. It runs great, but when it gets hot it turns off. I have no idea what the problem is. I replaced the CDI and it still does it. Somebody please help. Any help is greatly appreciated

[DnB_racing]

could be valves

[airmobile101]

Check you vent valve on gas cap and vent lines on FCR carb.