Need a little help with my speedo...

[gtxracer]

Okay I have found out the problem is only when it is 3s and above. 2s works fine, BEC kicks in and it's normal, although it does have some cogging and other problems with a Novak 7.5R. I didn't want to run this motor setup anyway, but it was cheap from a friend so I took it.

I've always liked Castle products but this one is making a bad impression on me :(