tandem bicycle

here are some pic of my tandem bike its a great ride

well i had to make a bracket to hold the motor . the gas cable was a tricky one i had to weld a ball on the cable in just the right spot to get it to work i found a extra long cable to make it work. me and my girlfriend ride it all the time it only has a 50cc on this bike my others got the 80cc on them. the tandem does 20 to 25 it does good on hills but we dont have many hills here. i got a shift kit i dont think it would be easy to put one on the tandem bike u would have to change the frount crank also and i thing u should keep it simple on a tandem cuz the motor is a lot closer to the back rider and the shift kit would be dangerious with all the extra parts and the motor mounts would have to be made to support the shift kit with the bike i have. do u have a tandem bike that u are going to use? if u show me some pictures i could tell u if it will work. i build bicycles and sell them at the flea market i have built fifty or more bikes with all kinds of motors frount mounts center mounts and some weedwacker rear mounted motors o got a beachcruiser with duell pipes it does 42 mph and i am over 200lb