650 head on a 701?

[tor*p*do]

Saw this on a running ski and now looking at a motor pulled from a ski
with this set up
Is this like a ghetto high compression head?
What is the risk to the motor, squish, deto, etc?
Thanks!!!!

 

[snowxr]

Ghetto, but it works if your squish band clearance is correct. Having the domes cut to 81mm would be a no brainer.

 

[tor*p*do]

anyone else?

 

[six5hooSX]

done that on a 97 SJ 173psi works good

 

[JustinB]

I am thinking of trying this on my SN build. I am using a 62t engine but need the 61x/6m6 bolt pattern for my Wetjet pipe. Anyone else try this? The only other spare 64v head I have has been machined for an 84mm bore.

 

[snowxr]

I have a 650 head cut to 81mm sitting on the shelf. Can't remember what cc it ended up being, though.

 

[D95turbo]

I'm running a 650 cylinder/head on a 61x crank case and it's pretty bad a@@