I have had this since october of last year and recently the power on top end is not there and it sputters at full throttle . I run VP 101 in it and until recently it ran fine . At slower speeds it is smooth running until I get on it . The problem started when it got over 100 degrees here in Phoenix . I ride it about twice a week for a half hour or so on the street and I am wondering if it could be the fuel going bad . Any opinions ?
The quad has a pro circuit exhaust and has been rejetted .