US$ 25.27
electric bicycle with suspension EUYBIKE Bike for Adults 1400W Peak, 48V 20AH(960WH) Removable Battery, 20"x4" Fat Tire Full 80 Miles Range Step-Thru Hunting Ebike, 7-Speed Dual Brakes Electric Black : Sports resistant fat tires with Leather Backpack Box - Type:FW04 Budget Electric Bike 2024
Leather Backpack Box - Black
All in all, everything looks right for a 1971 Schwinn, except I can find no mention of a 27" tandem in any catalog or on Google until 1978, and that was the Twinn Sport
Budget Electric Bike 2024
Type:FW04
So to Amazon where I found a Falcon Flux folding electric bike for around £700
resistant fat tires with reflective sidewalls improve traction
US$ 25.27
US$ 21.84
US$ 28.37
US$ 28.11
US$ 27.74
US$ 25.76
US$ 27.89
US$ 22.85
US$ 26.64
US$ 27.90
US$ 24.81
US$ 25.78
US$ 25.82