A newbie comment...
Here is the rule of thumb..
For the front sprocket : the smaller the teeth you got, the quickly the pickup you gain and vice versa
For the rear sprocket : the smaller the teeth you got, the more top speed you gain and vice versa
So, in terms to get the best of the combination, we need to search inside ourself first. What do we need? Do I need a quick pickup because of the winding road or Do I need the top speed because I ride the bike on the highway mostly?
It is a hard attempt to find the most suitable combination for every situation. Everything is count into calculation. The engine specification, the course, the road layer, the tires, your bodyweight etc etc...
So, one's setup might not fit well for the other..
The conclusion is.. Do research yourself...
BTW.. It's a very fast bike if capable of running up to or more than 170 km/h...
My drag bike top speed is 180 km/h (speedo) I believe it's around 162 km/h actual.. It's a RX-King 138 cc stock modified bike (14s class on 402m)
My 1600cc drag car top speed was around 200 km/h or around 180km/h actual speed... It was a Suzuki Baleno 1600cc SOHC for 16s class 402m.
So, I wonder is that a true speedo number or safety number for 170 km/h top speed?