Originally Posted by
grizz1
When run in the stock head shimming for that motor would be .5 mm....
....That is the factory shim stack, and is good for up to 30% fuel.
I've always thought that .5mm stack is good for break-in, but once break-in is over you want to remove the 0.2mm shim and run with the 0.3mm shim only.
Do I have it all wrong?