see link:  https://www.pedalchopper.com/d-i-y-build-your-own-gas-pedalchopper-kit-s/

Contact me in the form below to discuss your desired motor specifications.  I CAN BUILD YOUR ENGINE AND DO THE DESIRED UPGRADES / INSTALLATIONS [HERE] FOR YOU!  My specialty is OCC Schwinn Stingray custom "Motorized" Bicycle builds.  I have achieved over 40 mph [on an OCC Schwinn] using available High-Performance equipment.   50+mph RANGES POSSIBLE with our 3 speed transmission system attachments.

In our PHOTO GALLERY you will see a few Motorized Bicycle builds other than NEW ERA Stingray so, I can also help you make decisions on buying ENGINE ONLY KIT on other style bicycles  - other than Stingray.