I just got a 2002 Harley Davidson sc and I just measured the crank pulley and it's 10". Does this mean 10lb added to it? And if so, does that mean I'm pushing 16lb of boost? And I don't know if it's been tuned but how much hp would the 10lb pulley add? What should I be looking at over all to the ground and at motor? Also, what else could I do to it simple upgrades. The only thing that I know of is the crank pulley. Any info will be helpful.