thanks, i have bought some material that is .78 mm or 1/32-.031 inch. i wander if anyone has used a timing wheel to make absolute certain, that 1mm is the base gasket thickness to achieve the advertized timing settings. i would like to have the exhaust port timings over a broad range of gasket material sizes. i do know to port the cylinder can achieve a higher speed/rev. but to do that would narrow the power band somewhat, but give you a little more power in that range of the power band. i really don't want to go much more than 22/25 on the blowdown. and that means about 1mm to 2mm rise of the exhaust port. any more gasket material would give me the exhaust port timing to meet the needs of my pipe so it would easily give me 11.5 rpm's. and i'm running a boss. which is a short skinny pipe. but i will find a better pipe soon. i'm looking a a p6 or any other type that run flat along the bottom without a kick up like a simonini. my goal is a transporter having wire folding baskets. i will also put a hitch on back so i can pull a small trailer. so i can pick up car parts like transmissions, so i can get my cars running again.