1951 Travis Bike Motor
Power Products offered two models of the Travis Motor kit. This one features the larger gas tank with the 1.5 hp motor.
The other model had a smaller gas tank with a 1 hp motor.
Both models offered an optional all chrome finish. In 1949, the kits retailed from $69.99 to $89.99.
Travis Products Co
224 West Huron Street, Chicago 10, Illinois
Weighs 17 lbs
2-cycle 1.5 HP motor
External throttle made by Tyco Chicago
Aluminum cylinder with cast-iron sleeve; cast aluminum piston
Drop-forged crankshaft; fully counter-balanced
Made in Chicago, Illinois by Power Products
The Travis Bike Motor was a nifty invention, hitting the American market in 1949, at the same time as British cyclists were starting to fit Trojan Mini-Motors, and later Cyclemasters, Powerpaks and Winged Wheels to their bicycles to give them a bit more ooomph up hills on their daily commutes.
Travis seems to have over-estimated demand and, long past its sell-by date, the engine was still being plugged in Popular Mechanics Magazine. The above advewrt is from 1956 andf the one below from 1958.
TRAVIS BIKE MOTOR HANDBOOK