I would appreciate any thoughts on this... 2012 848evo, 3,000mi running rough abouve 95c. Compression test , engine warm, Vertical - 245psi Horizontal- 255psi Manual has good compression reading 210psi New gauge so not sure what to compare it by. Just ran through some very bad fuel. Running 90% better but still very rough above 95c Could I have slightly bent the valves (both?) Thanks
Something far wrong with these figures. 255psi would indicate an impression ratio of around 17:1 assuming no leakage! The 848 compression ratio is 12:1. so would expect around 170psi at very best. Definitely not bent valves.
