raptor 660, 727 big bore kit

[americanmuscle]

My friend wants to know if he puts this in his 660 if he will have to run race gas or if he could just use pump gas. I put this in the product review becuase i figured some of you might have it if you have a 660 and could help him out. he wants to go fast but still have torque

 

[97warriorrider]

whats the compression?

 

[americanmuscle]

12-1

 

[97warriorrider]

Prolly gunna need race gas then

 

[dave76]

It's liquid cooled, it can probably handle the 12:1. Hell the YFZ450 can get away with 13:1

 

[missouritrailrider]

my buddy has the kit, he runs 12:1 but race gas sure helps, lol

 

[97warriorrider]

It's liquid cooled, it can probably handle the 12:1. Hell the YFZ450 can get away with 13:1

damn thats alot of compression..how does liquid cooled affect it though..can somebody tell me?

 

[madcow]

I think it's because the cylinder wall is cooler, so the mixture can be compressed more before it ignites itself.

 

[97warriorrider]

thats what I was thinking but wasnt sure if there was something way more technical than that