head porting?

RottenApple · **Joined:** Sun Jul 27, 2008 6:08 pm **Posts:** 637

what would an aggressive port job run me kam?

ill bring ya the head.

KBR · **Joined:** Mon Jul 07, 2008 2:11 pm **Posts:** 101

RottenApple · **Joined:** Sun Jul 27, 2008 6:08 pm **Posts:** 637

cool.
if i go high comp piston (pump gas) but stay stock bore/stroke what do ya see for typica gain out of porting the head?

or should i say go for broke and do sock bore with high comp piston and +3 stroke? think its worth the money?

KBR · **Joined:** Mon Jul 07, 2008 2:11 pm **Posts:** 101

High compression is not pump gas on these engines.
3-4 depending on what RPM
Worth the money is all relative to how much money you got.
Big bores are my preference to a stroker.

RottenApple · **Joined:** Sun Jul 27, 2008 6:08 pm **Posts:** 637

so jus to clearify, i cant go any higher than stock comp and run 91? stock is what 11.5:1?

Dickarm · **Joined:** Wed Jun 03, 2009 11:45 am **Posts:** 738

RottenApple wrote:

stock is what 11.5:1?

www.google.com

chatcr250 · **Posted:** Tue Feb 09, 2010 8:41 am

Yes, yes.. Google is amazing. :lol:

Results 1 - 10 of about 4,760 for 2008 yamaha yfz450 compression. (0.34 seconds)

Try this:

http://www.yamaha-motor.com/sport/products/modelspeccompare/544/1661/0/compare.aspx

RottenApple · **Joined:** Sun Jul 27, 2008 6:08 pm **Posts:** 637

cool. 11.4:1....
had i not been on a fast dying laptop driving across the country i would have looked it up. fingered he would know off top of his head and didnt see shedding some knowledge as a big hassle.

will have to keep that google websight deal in mind. is it new?

head porting?

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