my mates raptor 660 was sputering today , its fine when idoling but when he gave it trotle it started sputering would not take trotle , switched it off and tryed it 10min after it was fine , any idea wat was up wit it?????????

 

How old was the gas?

 

check the gas breather hose... also check the gas cap itself for obstructions... (you'll have to take it apart)