Impressive stuff Scottie !! This is going to be a kick ass bike - All the best !!
Why a turbo and not a Supercharger setup ?
Turbos and blowers have their pros and cons. The reason why I am going with a turbo is because ultimately you have more power control with a turbo than with a blower. Blowers will typically build more HP than a turbo, and depending on the application, can make a big power house out of a motor. The disadvantage of running a blower is that because they are gear/pulley driven off of the motor itself, it takes MORE HP to produce bigger HP. Meaning, it takes more energy in order to turn the added drag of the blower being bolted to the motor, thus you need some respectable N/A HP to make some monster numbers with the blower. Because of this, smaller motors that don't have a whole lot of N/A HP to begin with will usually suffer slightly from running a blower because by the time the blower spools up and really starts crunching air, you are usually running out of RPMs.
On the flip side, turbos need to spool up as well, but because they are powered from the exhaust pipe, the power band is basically only limited by the valve train and timing keeping up with the RPMs of the motor. Therefor, for a smaller displacement motor, a turbo can build more HP faster. There is no "drag" on the motor with a turbo, and once a turbo spools, your HP is only limited to your tuning capabilities over the motor. This includes a combination of timing, (which is typically more retarded than a N/A motor), fuel mapping, boost controller and blow off valve. Also, another advantage to running a turbo over a blower is that with a turbo, because everything is tunable, I will be able to tune for more HP at lower RPMs and not put such a load/strain on the motor. I personally don't know much about tuning for a turbo, that's where my engine guy/friend comes into play. He's a Turbo Guru and is just as excited to build this bike as I am. What I can tell you is that we are shooting for 110HP at the rear wheel and this bike will be Dyno tuned and then broken in at the Drag Strip.
Scottie