boaring a 300ex

[99300exmonster]

I want to boar my 300ex .40 over w/ 11:1 compression piston. i want to put a cam in it and a higher revving cdi box. does anyone have any suggestions. like stiffer valve springs. port and polish, any help will be awsome. thanx

[jvd182]

http://www.exriders.com/vbb/showthread.php?s=&threadid=195797 *edit everything u need to know there.

[underpowered]

Originally posted by jvd182
look into the 300ex and rest forum... it has a guide to build your 300ex engine, it has alot of usfull info what to do

called the Sport Class forum.

[buster369]

i like the cams and everything unfortunalty sellin it now tho but loved it but i'd only go the smallest bore over with the weisco piston just in case something happens to it then u can rebuild it again. u won't see a difference between 20 or 40 thousanths over
too small of differnce between them

[99300exmonster]

hey thanks you guys....ill let you know how it comes out when im done.