which is best.my head swim's with factory ad's and unfounded hear say.at frist i wanted the ct power valve kit but every other person i talked to says ct is slow? i know also lrd has kit's but they seem to work mostly with honda clyinder's but iv been told there great and i believe there only power valve kit's are the bigger one's, im just a power crazied woods rider im gonna rebuild my engine every 2 hour's. esr was said to have very good kit's also but no power valve kit's "if im wrong tell me i wanna check em out" then i come acrossed the duncan raceing kit a company that has always grabbed the raceing world by storm whom iv known since i started rideing to be one of the best does anyone have any info on this duncan kit i was thinking of 265 NIKASIL sleve kit. anyone haveing info NOT opinon on any of these companie's, please share it with the site. im sure other's would love to hear about. the best kit's as well as i

speed does not lie within the manufacturers name but rather in the porting. the ct PV cylinder is a pro-x cylinder but cast to accomodate a powervalve. (pro-x is the same cylinder that everyone else uses for big bores.) now with that being said you mentioned you are a woods rider so you want all your power in the bottom end so yould need very little to no porting porting. duncan racing uses a different powervalve cylinder. i believe they use a PC-2000 cylinder.

I have only rode the ESR265PV and it was nice! I would have to say ESR is great for the money!
ERIC

Check out Project SandTrax Part 3 for info on the PV.
It's a great motor but it's not proted for pure top end. Great all around motor, plenty of lows and good top speed (clocked over 80 with a slipping clutch and 13/38 gearing)and teh best thing is how smooth it is, almost NO hit at all.