2012 Pro Compression

[oldym8rider]

Anybody know what is considered good compression numbers for a 800 pro? Mine is a 2012, is it different for the 2013-2015?

 

[TDR]

Should be 110-130 psi and even. Same specs.

 

[rcbc]

I watched my 2012's compression like a hawk from a 1000 miles on. I had 120 in both holes till 2000 miles. The pto side dropped a little and I tore it down at 2200
to find a cracked cylinder skirt. The final reading was 117/120.

 

[M1K]

I had 128 on both sides of my 2012 pro with 2550 miles. Decided to change since I was running out of warranty. Found the ring groove pin on one piston pushed almost all the way in. Very close to failure! Went with RKT pistons and I have to say this thing rips now, runs smoother and revs faster. The RKT'S are 37 grams lighter.

 

[oldym8rider]

Thanks much for all the help.