Originally Posted by
xxxntwv
For those of you thinking of removing a head shim,I wouldn't recommend it.I tried it this past weekend and it blew the plug in less than 1 tank.I removed the button to put the head shim back and it had already started pitting the piston.Just thought I'd warn people that it may junk the engine.
i removed a head shim on tank 6... and its been running now for over a gallon... and i only changed plugs for tuning options.. not because they are damaged.. you were probably lean