hi my name is dan and i found your forum the other day. i have been working on a pusher bike for a while now.started with a 26cc tanaka and only went 25 mph. next mod was a 40cc tanaka motor and got 33 mph. my next mod was to my frame of my trailer (i keep getting stress cracks) looks all okay now.my next mod was a smaller back sprocket now i am up to 38 mph. i put a test 46cc cy engine on it for awhile and found it was too wild ,broke chains and fried clutches. so i put the 40cc back on . not sure on how i can post pictures yet can someone help please?
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