Good morning, recently in checking my 2009 rzr 800 s motor out, I discovered a compression loss of 65 to 75 psi. So I intend on freshening up the motor. The race series I run states in the 800 class the engines can not be bigger than 800 cc, no turbo’s or superchargers. I currently have a stroker bottom end that I acquired about 6 mths ago, so my questions are;
1. What cc is a stroker with stock top end?
2. What cc is a stroker with +2 top end?
3 What cc is a stock bottom end with +2 top end?
And finally, which one of the above combinations would achieve the best hp for buck? I thanx you in advance for y’alls insight.
Utah RZR Rentals

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