I have a 07 Rancher 420, I just changed the valves, also rings and piston. I went up in size with ring and piston due to scuffing in cylinder. (.50) bike starts right up no more smoke issues, But now I,m cutting out when throttling up.

I bought a compression test kit, and looks like compression is good….but high compared to the service manual…which says 73psi my reading is right around 175-179….. i have replaced my rings before and everything was fine no issues, so now I,m stumped…. can anyone help????

I have a 07 Rancher 420, I just changed the valves, also rings and piston. I went up in size with ring and piston due to scuffing in cylinder. (.50) bike starts right up no more smoke issues, But now I,m cutting out when throttling up.

I bought a compression test kit, and looks like compression is good….but high compared to the service manual…which says 73psi my reading is right around 175-179….. i have replaced my rings before and everything was fine no issues, so now I,m stumped…. can anyone help????