[lincpimp]

I agree with the speed issue. If you are just hauling butt up and down a smooth road, 45-50 is good speed. If you are bashing off road, 40mph is about as fast as I want to go. Trees, hills, sticks, etc. are fun to play on at 30mph or so, but over 40 the jumps are starting to get high and the breakage seems to increase. Plus weight is a factor. The xl motors seem to work well in lighter weight vehicles, but bigger heavy vehicles with lots of batteries, all al parts, etc, will require the higher end motors. I wish I had more experience with the kb 45 motors, as they seem to be able to handle the heavier setups, and are still cheap.