Building Bigger and Badder Motors for your Harley-Davidson

Big Twin City builds high horsepower, high torque motors for your Harley-Davidson. We use your stock Harley-Davidson motor, amp it up, and rework it, to increase the stock specifications of the motor.

Our proprietary camshaft designs, cylinder boring, and head milling techiques, produce motors with up to 130 HP and 130 ft-lbs of torque, (depending on motor displacement). These motors will make you feel the rumble.