What would be an appropriate amount to take off when head machining a polaris 250 with some mods? I was thinking about 45 to 60 thousands. Does that sound right?

 

you usually get help from ritter he'll tell you what you need to know because if you go to far you'll end up raising the compression too high and you'll have to use race fuel if theres too high of a compression rittercycle.com

 

You do know that, .0675 is a 1/16 of an inch.
I went .020 head goes on this week, I'll write back.
For professional advise, call RCR

 

well thats what i told him to do go to rcr i'm not to sure i just don't want him making a mistake so i told him to talk to ritter.

Well from being a automotive mechanic for 4 years and spending a year working in a speed shop i know that when you mill your heads the compression does rise. And on a 2 stroke it brings the squish clearances closer. So he would be better off talking to the professionals at ritter cycle.

 

I was told 45 to 60 thousands by a guy that pretty much specializes in trailblazer performance. He wasnt really sure though. I have a pipe, clutch kit, ported, and just about have a predator carb on it just have to hook up the throttle cable. I'll probably ask ritter. Thanks.

 

The guy specializes in Trailblazers and wasn't real sure what to take off??? Whatever you do don't mill the head that much. I'm sure you will be into the squish band and mess all kinds of things up. My friend just milled .020 off his daughters head with no ill effects.

 

.020 is a good safe number to take and help with power output. If more is needed then the head really needs to be totally rechambered with the squish band adjusted. Bubba

 

Sorry i probably gave you the wrong idea. I really mean thousandths like .0045. Sorry for the confusion but he was wrong anyways. Thats probably to little. I think i will go .020. Thanks and sorry for the confusion.

 

You say this guy specializes in trailblazer performance but he was not sure on the 45-60 thousandths. Does not sound like much of an expert. Most dont go over .020-.030 thousandths or you risk damage.

 

Go .20 off the head thats what I did