I installed a Bafang BBSHD mid drive kit on our Calfee tandem a little over 3 1/2 years ago. The tech at Calfee gave me technical support and told me exactly what to purchase in order to make the installation. We have over 20,000 miles on the kit and are extremely happy with the results.

I installed this kit: https://lunacycle.com/bafang-bbshd-1000w-middrive-kit/

I am using this battery: https://lunacycle.com/52v-luna-direwolf-ebike-battery/

We always ride with the PAS engaged, we have 9 levels of assist and I normally run in level 1 or 2. Mileage is dependent on the level of boost selected but we can easily ride 60 miles on level 2. Probably 100 miles on level 1.

I have a throttle which I use every time we start and if we need an additional boost on a hill etc. I also have a motor kill button that I use when I shift gears.

There is no way we would go back to non electric assist!

If I were to build another bike I would do it just like this one.

If you want additional details/pictures etc. send me a private message with your email address.

Wayne