CR80 "normal" new compression?

(Bryan Hall) #1

What’s the “normal” compression on a CR80RB engine after a new top end? Yr 2001 I believe.

(James McMahon) #2

I don’t know a specific number… is it stock? That of course makes a big difference too.

I’d expect to see over 125psi, off the cuff.

(Bryan Hall) #3

Is it stock? I’m honestly not sure but from what I was told by the seller, I’d guess that it is not.

I noticed that some people say compression on 2-strokes should be checked hot, not cold. Of course different metals expand at different rates, so I’m sure that could affect the reading somewhat. That was checked at about 50 F.