Replaced the 12 tooth front sprocket with a 13 tooth one on my 1989 Suzuki Katana GSX600F yesterday. The rear is the original stock 47 tooth one. I didn't have to add any links to the chain after adding 3 or 4 initially for the conversion as the motor sits further away than the engine/transmission had.
I think I may be getting 2 MPH more on the top speed maybe a little more somewhere around high 30's, ie 38 MPH. The good news is the bike is not any slower off the line. So I question all the people who told me electric bikes need to run a 5:1 gear ratio, that or I misunderstood their advice.
- Mars ME0709 motor (heavy)
- 48 Volt Alltrax 300 amp controller (soon to be upgraded to 72 volts)
- four 55 Ah sealed lead acid batteries (soon to be six)
- 48 volt Elcon 20 amp on board charger (awesome)
- Magura Twist Grip Throttle (kinda cheap and plasticky)