My 5 port was from a new batch into New Zealand. This batch of motors are the first ones to be sold here with a country code and seriel number stamped on the side of the engine mount ( ie: NZ0000015). The engine came with only 1 shim pre installed and a second much thicker shim which I am assuming is the break in shim. Any idea why the different number of shims pre installed ?
I donīt know what size the pre installed shim is as it doesn't mention it anywhere in the enclosed paper work.

On a different note. Until recently we have only been allowed to legally race .21 motors in truggy class here. As of 2008 .28 motors will be legal for racing. What are some of the veiws on .28 vs .21 in truggies. A few guys have been racing the Go tech .28 6 port in non sanctioned events and it seems a really wicked motor for the heavier truggies. I actually purchased my 5 port to use in a truggy, but now the rules have changed I might use it in my buggy and think about a .28 6 port for the truggy ???