hi everyone.
been having some overheating issues with my DT, its running a cone style air filter, BigOne exhaust, racing reeds and a 60cc bore kit on the original 50cc head, increased the oil pump flow rate and the carb is running a 115# main jet, but over long distances (well, anything much over 15-20 miles or running for more than 30 minutes/1 hour) the power will suddenly fade and eventually the engine cuts, it doesnt seise but the heat can be felt (and smelt) when you are sat on the bike.
whats causing it to overheat and how can i fix the problem?,
regards
Steve-o