Ralphbf == You will see a good power gain if you go to a larger carb. The original Super Tiger carb is sized smaller to optimize fuel draw without a fuel pump. Since the Walbro has a built in pump, it can be considerably larger without problems, and will also provide more power. Of course this will only work if you can make your adapter throat bigger within the design constraints of the crankcase and your adapter, but I believe you can.

00airman == The mix that has given the best results, and that most everyone has settled on is:

1 part 10% oil - 10% nitro glow fuel
2 parts high test gasoline
Quality four stroke glow plug such as OS or Saito

AV8TOR