As I am getting close to finish building my scooter's engine (75% done), the time has come for me to address the final drive issue
.In the past, when I modified my underbone's engine to get more out of it, the last thing I'd need to do is reduce the gear ratio by changing the front and back sprocket gears, since it would make the engine revs too high with the original gear ratio, at least that's what's traditional.
With scooter final drive I'm confused. I have 2 options, one is using the Kitaco gear which my friend tried without success (it howls too much on a stock 125cc), or use the Yuminashi gear (45/15) to lower my final drive ratio. Reggy himself recommends to try the stock 47/13 gears from the PCX 1st gen, which actually raise the gear ratio with the explanation that the esp gear ratio is too heavy.
Which option would be optimal here?. I weight 90kg, normally nothing more than 150kg is demanded from the scooter. I care about acceleration more than top speed to be honest. I am using the Torque Control Vario from Yuminashi with a shortened boss and at high speed the engine revs a lot lower than compared to my previous setup, so I take that reducing the gear ratio will result in an even more higher top speed?
