To pitpop, first off thanks for all the helpful advis and the time it takes to answer our questions. Next I just purchased a new Orion .21 abi 7 port crf for my RC8T truggy. In the directions it recomends breaking in the motor with 16% nitro. Is this typical and what you would suggest? And lastly I am going to order a new tuned pipe. Either 2013 or the 2058. What is the difference and your recomendation?
Thanks in advance.