Fieldy, the debore pistons are rare but not worth a lot because there is next to no market for them. Klemm sells debore sleeves to put in the stock cylinder. I think there are 4 size debore pistons for over bores but I'm not sure. I'm putting a kdx200 into a tecate frame so I don't have to deal with hard to find parts. A carpool thread would be good idea. I'm going to push racing more this year than I have in the past, I'll try to start threads for all of the east coast races. Keep your eyes open for them next summer and post where you are, maybe we can hook some people up.
Ritz cracker, you want to make sure your trike is in good condition before showing up. Front and rear brakes, tether kill switch, non broken clutch and front break levers (the little balls on the ends of stockers are best), and cotter pins in your axles are all checked at Tech. TT races have a maximum width of 50"z and you need to have flat track style rear tires. If you have any other specific questions don't hesitate to ask