Hows the intake timing look? The 2 small ports obviously open last, but is the 1 big one too early to make sense? If it's not too wacked out you could treat um like one big port(like CAPT said) or if the one big port is on time use just it..???? OR how bad IS the stock configuration? Fire it up EPA jazz and all see what ya get(heck-all ya need now is a mount and prop) ..?? IF ya need carbs I would definately swap carbs for 30cc Homelite (old style) CDI prop adapters. I've got carbs[sm=drowning.gif] and 30cc Homey longblocks.