The Bisson Webra 120/ MDS 148 will fit. Run 5% nitro with 20% oil mostly or at least half castor, a H9 superPlug or Fox Miracle. Starts by backflipping are one flip affairs after priming. See if Horizon will send you the 10MM carb for the 2.18, it has MDS cast on the front. Although the stock C1 carbs on both of mine were fine.