Yep 300cc's here. I went with a little extra porting which I think helped with the rev out. Very nice fit and finish except my exhaust flang for my upper cylinder needed a little extra work. May have been my JHA pipes not sure there are the only ones I have. Performance wise Awesome! Great street motor tons more torque, can't keep the front wheel on the ground with street gearing. Widens the powerband a lot. Lost a piston first track day. My fault incorrect jetting and very cold temps 50F. New piston and rings $50. 6 track days later and I can't break it even with a 3400 foot straight. I've never delt with a more professional company either. Matt returns all my emails and does everything to help out. You can see that if you follow this site.There is no replacement for displacement!!!
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1995 A kit TZ 250
1994 Rothmans NSR 300sp SOLD
1998 RM 250 freestyle/motorcross
1998 Meathanol burning CR 500 AF super retard/motorcross/sand dunes/play bike