XXX-4 slipping a lot

[Alexi]

Hi, I just took my XXX-4 out for its first proper run.

It is slipping a lot, I can't get any grip, or any speed. I don't think it is the tyres as I have tried 2 different sets, and it slips on carpet, tarmac and grass.

I don't have the tool to adjust the slipper, I will get one, but I am guessing it's either the slipper clutch, something to do with the belt, or the diffs.

How can I check all the above are fine? I have no experience with belt drive, and very little to no experience of slipper clutches.

Any advice would be hugely appreciated, thanks,
Alexi

PS, almost forgot to mention, I am running a mamba max 5700 on 10 cells, so I do have too much power. However I am getting more that a bit of wheel spin, on grass the car wont hit 15mph.