Decided to remove that air solenoid plug today.Got the plug off but still popping .Whilst the exhaust front pipe cover was off i notis't the nut on the back cover was vibrating on the exhaust clamp, so i left the covers off on both sides of the bike cleaned up the front pipe took the pastic crap rad cover off .Lowered the forks through the yokes 10 mm /ripped out the cat drilled the silencer snorkel gone. 'O' no vibes.