Last year had an 860 BB installed and it seems to have a cooling issue, at least on the trail according to the temp gauge. The engine builder won't respond to me, so I'll try to troubleshoot it on my own for now. Never had an issue prior to the re-build except it is the 2015 T3 has does run high on overly warm days when running the trails. I wouldn't think it would be a water pump issue with such low miles on the bottom end and not sure about thermostat or temperature sensor?