Straight-three engine
INLINE PISTON ENGINE WITH THREE CYLINDERS
Inline-3; I3 engine; Straight-3; Straight 3; Straight three engine; Inline-triple engine; Inline-three engine; Straight-3 engine
A straight-three engine (also called an inline-triple or inline-three)Let's Ride: Sonny Barger's Guide to Motorcycling. Sonny Barger, Darwin Holmstrom.