Duratrax Overdrive ST.
After running for short burst at WOT and getting the truck to shift into second gear it will sometimes bog down and even stall. I have only used it in the street so far and have not let it go more than 150-200 feet away before slowing and turning around for another short run in the other direction. I have used 6 or 7 tankfulls of fuel. The air cleaner is still clean and oiled.

Richen up the mixture and see what happens! Or try a new plug.

your right john, sounds like it needs to be richened up a bit on the high speed.

another thing that it could be is if your using a fuel filter. That can sometimes make it act like it is boggin down. I had that problem with an MT12. I couldnt' ge the motor to even idle till I removed the fuel filter.

try richening out the high needle and check the fuel filter make sure its clean and the carb too. im haven the same prob with my ntc3 look at "need help bad real bad"