Hey Signal,
The biggest change for the new bike is my sitting position and some motor work... on my bike last season, I felt pretty cramped on it, and getting low was more of a contortionist maneuver, ha ha. So on this build, I've built a lighter/solid mount for the fairing (welded a bracket to the down tube and made it adjustable) in order to extend the fairing forward about 2 inches more or less as needed. I've also moved my seat back about an inch and the foot pegs are down a half inch. so I can get lower and essentially lay down on the gas tank in the straights. For the motor, I've torn down the other two spare motors and taken the best of each. removed some weight (Kick-starter assembly), and built it back up with freshened up transmission, clutch, etc... I've bored out the piston's 1mm over, and have heavier/racing spec valves/springs, with new valve seats, seals, etc. On the cam, I've put in an adjustable cam to get the timing spot on (As the stock cam's were ok for the street, but have a little variance in them which impacts performance...for example, I found my stock cam on my bike last season was retarded by almost 5 degrees from the factory). My hope is the new bike and engine will be a lot more "umph!" and I won't get pulled away from on the straights.