Thanks for that, I did have incorrect gearing but that is sorted now. The set up was getting hot but not blowing (probably close). I haven't run with the new gearing yet but I think this was a major part. I've cleaned out/replaced bearings too and it all seams free. The only reason I've brought this subject up for is to try and minimise as many reason for heat build up as possible. The last 4 races have been outside in around 37/38 degree temps which also doesn't help much.
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