I said it was "my simple answer". I thought it might give him some basis to decide which type would work best for him. A 1/4 pipe can be very effective if the rpm it boosts work well for the plane it is in. However, if the prop it takes to get the proper loading for the pipe is too small to work well on the plane it is installed in, then the 1/4 pipe can do more harm than good. In that instance, a stock muffler could be the better choice. A full wave pipe can help you use the best prop for the combination.
I couldn't care less about two stroke bikes.
