Which ever direction the motor turns to het the truck to go forward you may need to take the motor off and run it to figure out what direction it is turning. I have a motor dyno but for the lower turn motors I am going to need to get the optional steel flywheel the alluminum one I have for higher rpm motors wont put enough load on them to get a good reading but with the dyno you can adjust the timming to get the most out of your motor. Try this link it is helpfull in understanding motors and their proformance.
http://www.rccartips.com/rc-electric...ning-guide.htm