I'm building a metra 80 small port for my Puch dart and wondering about the base gaskets. I bought the kit used and it has no gaskets!! at BDC, where should the piston be? I have 1 base gasket and the piston sticks out 1 or 2mm in the exhaust port, about the size of the ring. you can see the top ring! at TDC it totally clears the intake port. so it seems i could add a base gasket or 2 and have it totally clear both ports!! my concern is overheating the ring! but its not hitting the head, so it has nice compression!! what do you guys think?