Right now i have a warrior and i might be selling it cuz its junk. i can get a 250x for a cheap price and might buy it. So if i get it i want to build it up and wanted to know what sizes u can get a big bore kit and how much $$ it will cost.

 

I have a 300ex motor punched out to a 405cc By TC racing the price was around $2600 u can also get a 365 kit for a little less money

 

or put a atc350X motor in it bored to a 450 like in atv sport that thing was nice!

 

Whatever you do, make sure you call TC Racing.

 

would a 400ex motor fit?

 

You are gonna spend $1500-2000 to find an EX engine. You will then have a 26hp bike. Send a 250x and that much money to TC and you will have a 40hp bike. Pretty easy decision, isn't it?

 

350X motor can be had a totaly brand new crate motor for like 900 and is a much easier swap
actualy the 250X with a 350X motor and a supertrapp can outrun a stock 400ex