This is my 2nd bike that I put together. The first one was a learner hardtail Rockhopper. Not quite my cup of tea.
So I'm out on a quest to make a sub 50 lbs bike that can do 35+ mph.
Here's what I got.
1. Donor Specialized S-Works
2. BMC Gear Hub (evtech)
3. Crystalyte 24-72V 35A Analog Controller (ebike.ca)
4. A123 M1 20S2P 66V/4.6Ah Battery (custom)
5. Crystalyte Half Twist Throttle (ebike.ca)
6. Cycle Analyst (ebike.ca)
After talking to Maytag, I've upgraded the motor phase wires inside the motor and kept it as short as possible.
he motor, controller, throttle, and cycle analyst mounted was a fairly quick and easy process. Couple tie wrap and wires shortening things were done in a jiffy.
The stock 20A controller is a PIC, it can barely do 20 at 36V lithium. I immediately went shopping for a better controller. Considering the BMC motor got plenty of torque, I didn't need the CL's 48A controller. IMHO it would just be a waste of torque and potentially ripping out my dropout. So I got the 35A controller with the main goal of bumping my voltage and therefore top speed.
I ran into a minor hickup with the drive system. The S-Works comes with Shimano Deore XT 9-speed shifter, which didn't work with my 7-speed flywheel on the motor. I had to downgrade to a 7-speed shifter which was significantly rougher. I might get that 9-speed flyweel and rehaul this.
There's still ALOT of work to be done for my baby to be on the road such as dual torque arm installation, battery pack & enclosure fabrication , lighting etc. But the basis is there.
I'll be updating this with the progress made.Status Update:
05/25 - A123 M1 20S2P 66V/4.6Ah Battery Pack completed.
06/01 - dual torque bar installed.
06/04 - Enclosure mold produce. Kevlar/Carbon Fiber laydown started