blaster rebuild

[jfriend]

have a 2001 yamaha blaster with a +4mm crank and have bought a 68mm piston for it as well can any1 tell me where my cc's are going to be @ when its bored,honed, n instaslled

[headache]

it is going to be 221cc's. what other mods are you doing?

[aDviSol2y]

Originally posted by jfriend
have a 2001 yamaha blaster with a +4mm crank and have bought a 68mm piston for it as well can any1 tell me where my cc's are going to be @ when its bored,honed, n instaslled

Enough cc's to have to rebuild it every year at best!

[jfriend]

it has full fmf pipe a 34mmpj carb +3 swingarm banshe axle its a project 4 my kid so i can get him off my 426ex damn kids;)

[jfriend]

how did you come up with 221

[headache]

heres formula.. bore x bore (in inches), x .7854, x stroke (in inches) x 16.387

68mm=2.677 bore
61mm=2.401 stroke

it should run strong. Are you having it ported? If so it should easily beat a stock 400ex..

[coreyownz]

loose the fmf if you want maximum performance you need a right bend pipe i had my blaster worked so it would beat a 400ex stock np. get a dynoport if you go on ebay their $320 but so worth it