These should be available at DDM by Thursday 6-27-13. Call DDM at 1-866-368-1441 and ask for "Brad" to make sure you are getting this exact kit (.005" copper gasket and a RCMK piston). Here is the new DDM ad and some pictures.

ESP “New Generation”, 30.5cc PUM racing conversion kit.
ESP and DDM tries their best to sell what they race with. Many races and championships world wide have been won by “up and coming racers” using a ESP engine right off the DDM shelf. This conversion kit comes with everything you need to change any Zenoah PUM engine into a 30.5cc monster eater (accept PUM cases center gasket). This ESP Championship Ported (36mm bore, 30mm stroke (or +2mm stroked)) 30.5cc top end kit helped Dick Loeb set the IMPBA 1/4mi timed oval World Record in Franklin Virginia in early 2013, using Donnie Padgett’s Whiplash sport hydro hull. The cylinder porting is set up well for the 2mm stroked crank, using high duration intake and exhaust port time, a RCMK piston (for the longer piston skirts), a .005” thick copper cylinder gasket, squish band and combustion chamber work done (Higher compression for poor air quality days, and squish cut at .020“ with my tallest RCMK piston), and a Zenoah sealed 3rd crank shaft bearing. Use the 2mm Zenoah marine crank, (DDM part # dd327), with the Zenoah sealed 3rd bearing (DDM part # dd271---which replaces the large diameter crank seal) , for more crank stability under high RPM and hard loads. Only Zenoah cranks offers full support (bearing ID/shaft OD) for the 3rd crank shaft bearing. The kit also comes with the Zenoah piston if you want more top RPM power (at the expense of a little corner pulling power), and will add 4 degrees of duration on the intake port time, 1 to 2 degrees of duration on the exhaust port time, and a bit less compression. You may find a simple piston swap (both pistons use the Zenoah ring and Zenoah “top rod end” parts) will help make this 30.5cc engine a bit more versatile for different types of racing.

If you were thinking of trying one of the new generation PUM 30.5cc mills (making big waves on scattered ponds across the USA today) in your Hull for Racing or Recreation, pick one with top quality workmanship, (all work done in house by Doug @ ESP), with each cylinder dimensionally the same as the last, (sans future design changes). Pick one that always offers top notch service (DDM and/or ESP) that does not end after the sale has been made. Pick one that can win races, but is still about as reliable as a stock G260 PUM (due to top quality workmanship and design). Pick one that does all this, without picking your wallet.

Pick ESP @ DDM today.

Thanks for considering my stuff.

Doug @ ESP
(616) 458-8103 (EST Zone. Daytime only, 7 days a week)