Originally Posted by
GNS Racing 86
hi everyone
i just got the go .28 6 port and breaking in the motor. it came with 2 .004 head shims installed and 1 .008 not installed. i installed the .008 with the 2 .004's for breakin.
what shims should i use after breakin, im using byrons 25% with 11% oil.
thanks. this is my first go engine.
Hi GNS. Not sure about the stock shimming for the .28 motor. We are only allowed to run .21 in truggy here (silly national body rules), so there aren't any .28 GO's floating around. I am guessing the extra .008 shim that came with it is a break-in shim, and the shims that came installed is the stock set up, but can't be 100% sure on that. I know some of the guys on here run the .28 so I am sure they will pop up and confirm that for you.