RE: DDM 30.5cc kit question
yup, piston mark points to exhaust, ring gap towards carby. now, did you use the stock 28mm crank? or did you put a stroker crank in, either the 1mm or 2mm?
also did you put in a NEW plug, or the old one from the original top end. hook up your gas lines correctly, pick up in tank goes to bottom, overflow goes to primer bulb.
is your kill switch shorted out? or is it stuck in, Getting any spark?
use a regular ( OLD STYLE ) business card to measure your gap, i actually folded my DDM card in half and used that for gap setting, worked well.
Timmahh