muffins51
New member
My buddies 08 m8 with around 3,000 miles just started bogging at about 6,500 rpm and then backfires! We just cleaned the power valves! Just replaced all 4 plugs. Had new primary put on last year! I'm thinking it's either fuel or electrical problem! Anyone have any pointers! I need to check power valves and make sure they are working and that they are adjusted correctly! Anybody have the specs for power valve cable length? Anything is appreciated!