You bought a B1 for a 12th scale???? Didn't it come with a manual? Are you using a Futaba 3PK?

The B1 is to be used with micro motors like 180s and 380s not 540s. For 12th and 10th scale you should have bought the FX or FX Pro.

Oh, in case you can't figure out where their web site is it's called teamtekin.com I think. Just Google Tekin.