GM 120 Issue - Cogging

[dibble34]

Hi All, nothing is ever simple in this hobby!

Having a few issues with the above speedo. On firmware 7.2 and model 7168. I am having cogging issues at low speed when running sensored.

I set the speedo to program 2 via the transmitter and reset mode 2 as well. I have used a laptop and played around with soft start and turning amps down, but nothing seems to help. If i unplug the sensor lead things get worse.

I am using a futaba 3vc handset with throttle reversed and everything set to 100. I am using a brand new 6.5 gm motor (tried a losi 6.5 as well with the same issues)

I am a little worried the speedo is faulty, any ideas? Is there a setting i have missed?

I also set to LIPO mode, but this didn't help either
Thanks

Dave