416 or 425

[slavedriver]

i am looking to wake the motor up on my quad. I have been looking at either a 416 or the 425, but i havent gotten alot of info on either. I am into mx racing, i dont want a 440 cause i have heard that a 416 or 425 will be quicker revving, and better in the long run. I was wondering what i would need to get for either one?? Is this something that i can do myself or sould i send it away?? and any opinions on what would be a better set up for me to race with. Thanks for all of your help!!!

425 with TC cam, new rockers and springs and new pision and rings set will put your bike at the front of the pack. Im plannin on doing this very soon. Good luck!!

[Extremeracer167]

If u know how to rebuild a 4 stroke engine, u shoul dhave NO PROBLEM!!! With the 425 kit that i have from TC, i didnt need rockers, springs, or anything. I just got the cam, punched it out, wiseco piston, TC exhaust, and thats about it. I lvoe it, it runs with the best of them. THe only guy that i have really gotten flat out beaten by is Brad Macri in the 4 stroke mod class, but he has a 500 stroker kit. well i guess i got beat by a 465TC stroker kit too. But thats a few hundred out of the pocket. Call Tc and he will tell u what u need. www.tcracingengines.com You WONT be dissapointed, i garuntee that!!

[slavedriver]

where can i get that stuff for sheap is there a place online that i can order it

[Extremeracer167]

No u have to go through TC

When putting in a new cam in a 400ex it is somewhat a plus if you change the rockers and springs even if it is a tc cam.

[Dave400ex]

Well you could get the TC stuff from Rocky Ridge but might as well get it from TC.