Inner Diameter: 1.5"(38.1mm); 1):Compatible with 1.5" to 2" stud spacing and suitable for front mount bolt 6mm and 8mm, 2):For 66cc/80cc and 48cc 2-stroke bicycle engines Universal Mount for Bike Motors This universal mount helps mounts your bike motor to bigger down tubes. Works on most newer bicycles and allows you to mount the motor without drilling through the frame.
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