No we jetted it....... its tuned perfect and with a ported air box lid as well.......... I bought it my brother was riding it and I had a 01 raptor 660 and the blaster was more fun and faster in the trails cause it handles awesome just sticks to the ground no matter how hard you go at a turn. So I traded the raptor for an 04 crf250r and he likes the bike so I got my blaster back its just a super fun machine no matter what you have ridden more power or not.