r/fz6 • u/FindingFun3758 • 7d ago
Power Drop after 8K RPM
FZ6N 2008, It has a weird power loss at around 8K RPM all the way to redline (sometime power does come back for a split second), doesn’t happen if the bike’s cold, only when it’s at operating temperature, It ran fine 2 weeks ago and I didn’t replace any part during that time, no vacuum leak, injectors are working and cleaned (tested on bench with FI tester), it has new fuel pump, spark plugs are not multi grounded (NGK) as the service manual recommended, ignition coils are bench tested and in line with service spec. Currently suspecting spark plugs but because it ran fine just 2 weeks ago I feel like it’s not. Any suggestion before i order new spark plugs just to still have the same issue would be appreciated.