Im Bobbo. I do weird stuff. My first car was a cop car... that i made shoot fire out the tail pipes... my first 2 wheeler as an adult was a razor scooter... that i put a flame thrower on... now i got this 24 speed/21 speed (the tiny sprocket is wore out and i adjusted the limits of the derailer to not even hit that gear leaving only 7 abailable sprockets left, so 7x3=21 speeds) and a 31cc ryobi. I swapped the bottom bracket with one of them ball bearing "Good" kind and greased the ******* before i threw it in. Heres my plan... Run the chain from the syobi (were using bike parts here people... mounting a "rear cassette" on the clutch part of the ryoby so we still have a cyntrifical clutch. Then on both sides of the bottom bracket run foreward sprockets... the big ones. so from the motor its gonna go... ryobi to big gear on left(power transfer)small sprocket on right... and back to the rear cassette.