Hi i've got a chopper style bike in the shed
(same as this one)

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(and this motor)

NEW 48cc MOTOR bicycle Motorized BIKE GAS ENGINE Kit - eBay Complete Bikes, Mountain Bikes, Parts, Cycling, Sport. (end time 05-Sep-08 23:42:31 AEST)

Do you think it would be a good build??
and how could i fix the exhaust so its more longer? (look in picture)?

Thanks