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I have an 03 raptor 660. Yosh RS-3 full system exhaust with K&N filter. I drilled two 1 3/4" holes in the lid. I had the bike jetted the bike with 150's. I am sputting at the top end. I believe that I need the 155 on the right carb. I ride with 8 friends who all ride the 450r. They are faster on the top end. Some are stock and some are piped and jetted. Do you think the jetting is the problem? I am at sea level. Any suggestions?
Thanks
Thanks