Recommendation for big bore kit(300)

[monster300]

I'm looking into racing next year and i want recommendations of companies that mod the engine for performance(big bore, cams, carbs, etc.):devil thanks for all the help!;)

[sweet300ex]

Hetrick, their 330 kit is supposed to haul

[honda250xrider]

i recommend, a web cam, lectron carb, you could stroke it or bore it, boring is much cheaper though, if you go with boring i would go with the 330 kit. i have used weisco pistons in all my engines and have had good luck with them.

[BLURR250X]

Right now I'm getting the 350 kit from ProFab with a cam.I can't tell you how it works yet because I haven't got my quad back yet. I'm expecting a huge power increases though.The only reason I decided to go with the 350 over the 330 is that I heard it was hard to find replacement pistons for the 330s when they go.Not sure on that but the extra few cc's sounded pretty good too.

[honda250xrider]

BLURR250X- the bad thing about going with the 350 is i dont think u have any overbores left im not sure about this though, not unless you stroked it also

[BLURR250X]

No I didn't get the stroker right now.Probly later in the summer.Just the bore kit for now.I don't know if I'll have any room for an overbore or not. I doubt it.Although the guy working on my bike never said anything about it so its hard to tell. I'm just gonna take a chance and hope it lasts a while.How long do you get out of your 330 before u rebuild it?

[honda250xrider]

every winter i rebuild ;)

[monster300]

how much would i spend for everything i need? 330 or 350, doesn't matter

[honda250xrider]

see there are alot of things that can vary the price, if you take off your head and find you need some new things that can up the cost, and if you want porting work and a new cam and so forth that can vary the cost, but just for the 330 kit, i think it would cost you around 300 for the kit, 100 for the boring the sleeve out and pressing the new one in, and new gaskets, maybe a new cam chain, and maybe a 100 for labor im just guessing on this it could be 400$-600$ and if you go all out it can be up to 1200$ or more, u might need new rockers if they are worn see there are just to much stuff that u cant tell intil you get inside your engine and find out if anything is wrong with it and how much the new parts will cost. and maybe a 100 for labor im just guessing on this it could be 400$-600$ and if you go all out it can be up to 1200$ or more