freeride73
Active VIP Member
My friend was riding his 2013 RMK Assault 800 yesterday. Filled it up with 91 from Costco. Was about -25 C, he let it warm up for about 10 min. Rode slow at first then it just stopped once he started riding. He thought it might have been water in the fuel tank. Got it going again but had no power. Took it apart and mag side piston was scored. Plug was quite white (Lean). So we will rebuild the top end. Any thoughts on what might have caused this? What is the bust fix with pistons? Is this common with Poo's. He only has 600 miles on it and this is our first year with Polaris.