Because the expansion chamber has such a big circumferance is was hard to get the header near the exhaust port. The CR header was not cut off, just a new KX header machined, inserted and welded into place. The exhaust was then hammered / scalloped to clear the frame down tubes on both sides, but the chrome plating never flaked, so it get get closer to the port. (This may upset the exhaust experts, as it will not match the bore and stroke differences between the CR and KX, only a few mm in it though i.e. header lengths, but you got to try with hybrids). The exhaust was also hammerd in to allow for the kick start, and the stinger section was cut and re-angled, but that may not be needed for a smaller two stroke silencer. Going to put a new head gasket in soon, so could take some more pics of the pipe scallops.
The bike has had alot of admirers so far, especially the pipe.
My old KX was called Daphne after her from scooby doo, anyone got any ideas for a new name for the AF.