Super Jet 760 compression differences

[jetskiWilly]

Just picked up a blaster 2 with a 760.....clean...low hours

Checked the compression 170 on the back 150 on the front. The ski has sat for atleast a year....took it out this weekend put another hour on it, and it ran good but the compression has me worried.

Should I just run it or plan on replaceing rings asap(as long a cylinders look good)??

 

[RMBC Freeride]

760's have lower compression in the rear cylinder from the factory (assuming it has the stock head on it). Nothing to worry about.