I checked the muffler fitting and it is not stopped up, also at idle, it seems to be running to lean in that it just dies, it does not produce excess smoke.......but it does transition smoothly, so when i richen it, it idles better, but the transition is awful. I tried an apc 12 x 6 originally and there was almost no difference, I was actually recommended to make the move to a 13 x 6 by the guy at my LHS. It seems like no matter what i do, i am unable to tune the top end, because no matter where i have the high speed needle set, it will always reach max rpms then lose some and eventually die off.


as for cooling, it cant really escape behind the cylinder head, tomorrow i will try it without the cowling just to see what happens, i have never ran it without the cowling, i never thought that might be a problem? will get back to you guys tomorrow afternoon.


Thanks,,
Matt