Join Date: Apr 2017
Location: Queensland, Australia
Read my reply to your PM.
I do not recommend such an extreme gearing change. I tried it and it was too much for the bike to cope with. You have to ride the bike like you stole it, rowing the gearbox all the time or you will lug the motor.
My opinion is that even high-speed freeway 65/75 mph speeds will return poorer fuel economy than stock. Your proposed gearing change is too extreme. Trust me - I have already done it, and reversed it.
I found 14/42 (OEM Ninja 300 gearing) to be ideal, but that engine fault light still keeps coming up.
If you check these gearing ratios you will find that 15/46 (3.066) is not that much lower than 14/42 (3.0) and 15/46 does not cause the fault to come up.
2017 Kawasaki Versys-X 300; 2010 Suzuki V-Strom 650; 1988 Suzuki GSXR1100J