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pv or big bore kits
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Posted by: 250rbadboy

what kit will produce the most power? how reliable is each one?why is one better then the other? reason is looking to redo my motor with a ESR kit .

Posted by: tazman7

I just bought a 250r with the esr 265 kit on it the other day. Damn nice, lots of power. He said it is one of the most reliable kits you can put on an engine and he was a Honda/Yamaha mechanic. So far I love it and have only been of of my new quad to eat, piss, and sleep!

Posted by: koh0001

The best would be..PV BIG BORE. the power valve helps with the low end power.

Posted by: 250r4life

i dont neccessarily think non pv vs pv changes as opposed to reliabilty... i personally have a pv, but i would be fine without one... as for big bore, i would definately say that they are less reliable than smaller kits... they wear a lot more on the other parts... personally i would not go any bigger than a 310... you dont have to split the cases, it'll be plenty fast. and as you go bigger the bike revs slower and ends up being different... as you go bigger you dont wind it out as much, which is part of the reason to have a 2 stroke, to wind it ou... the quadzilla is a fast bike, but its not too fun to ride...

Posted by: 250rbadboy

then i guess a 310PV WOULD BE THE BEST CHOICE. TO GET A LITTLE MORE TOPEND AND STILL HAVE THE GUTS AT BOTTOM END.

Posted by: beerock

330 non pv will suffice, its the best of both worlds without the extra money and maintence of a pv imho

Posted by: baker250r

i got a 270pv.... it enuf to keep up with the 450's easily. but i also got cr250 flywheel.. so that probly helps too.