yea, i m thinkin about puttin some stuff on this winter

 

His Zilla must have alot wrong with it. I can acclerate faster and have a faster Top End then him. Thats with a 12 40 gearing. If I had my Stock gearing I would pull away alot faster.

 

how do you calculate ? my bore is stock 67mm my stroke is 70mm I bored it over by .090 or the size of piston I used was 69.25mm I am gettin weird number if i times Bore against stroke4,847.50 ???
K-dog

 

ive read the article before about the stock zilla and modified raptor and definetly believe it, but 6 lenghs through the gears i dont especially because u only beat it by 3 tenths

 

You're on the right track. I had to double check my numbers, thinking that you had a zilla, but you have the 250, bored 90 over which would make you a 265 ...

What you take is .09*25.4 = 2.286 + 67 (stock bore) = 69.286mm.

Then calc the area Pi x d² / 4 = 3.14159 x 4800.55 / 4 = 3770

Then your displacement is 3770mm² x 70mm = 264923mm cube, divide that by 1000 to bring it to CC's and you have 265cc.

 

Kdog bore x bore x stroke x .0031416 divided by 4

 

thanks scrambler that works! thanks
K-dog

 

i welcome all rappys to my zilla as long as you aint built by craycraft or running on alky or anything like that. ill take on any piped or stock raptor anyday

 

kingofthemud where do you live????

 

knoxville,tennessee

you might have read about some local riding spots in dirt wheels like windrock mountain/royal blue/coal creek