Well, I dont think I have ever seen a Tandem W. Flyer so I am not sure if the the Chinese 2-stroke will fit anywhere. A pic would help or check this thread for frame dimensions and a engine template that you can print out.
Link.....
What kind of bike would you recommend?
There are other options like a rear mount kit.
The first step is decide what type of motor you want to use..2-stroke, four-stroke, and where you want to mount it? In frame, rear mount, front mount?
