There are many racers out there, that will tell you.... A built Motor for mission is a wast of time. But the last time i checked almost all of our past "PRO or EXPERT "champions have had built motors , some very extensive other much less involved. There are different levels of corse ,all the way from decked heads($ 300) to full AMA spec supersport motors.( $3500). So my question to you is why do so few of us racers build our motors, is it money , time, lack of product knowledge or less desire to WIN?? Also another thing ,how many of us rebuild your motors after one season or after two? The reason why I'm asking is because throughout the US this is very common ( rebuilding after every season ) but nobody really dose that here a home? Your comments please.