I did the tccd50 with promo pipe on the 350 dollar maxi I picked up last May. With 2 shoe stock clutch and dos blue springs she's doing 38 all day long. I'm not going higher than the tccd50 without a new crank.. I did rebuild the engine this winter. 14mm bing carb with 15mm intake, 1 ring needle leanest setting 2.20 atomizer and 74 jet and she's in the power band the whole time.
