The odometer reading is the headline here. Big Dog Motorcycles, a Kansas builder that turned out factory-produced custom cruisers before shutting down at the end of the last decade, sold the Mastiff as a long, low softail-style machine meant for straight-line boulevard work. Most were ridden. This one, for whatever reason, essentially was not, and only a handful of those 151 miles were added by the selling dealer, who bought the bike in 2026. It comes with a clean Arizona title.
Power comes from a 117-cubic-inch S&S Cycle Super Sidewinder V-twin fitted with chrome cases, a dual exhaust system and an S&S Shorty carburetor. That engine feeds a six-speed transmission and a right-side drive belt. The dealer replaced the battery and changed the oil before listing the bike, a sensible step for a machine that has spent far more time parked than running.
The bodywork is black, with flame graphics and an eagle motif on the fuel tank, the kind of styling that dates the bike squarely to the mid-2000s custom boom. Polished alloy wheels measure 21 inches in front and 18 inches at the rear, wrapped in Avon tires. A chrome conventional 41mm fork handles the front end, while hidden shocks link the frame to a triangulated swingarm, preserving the clean hardtail look without the punishing ride. Performance Machine calipers grip cross-drilled discs at both ends.
Additional equipment includes forward foot controls, folding passenger pegs, turn signals, a contoured two-up seat in black leather, a low-mounted license plate bracket and a side stand. The chrome handlebars carry billet levers, mirrors, chrome grips and switchgear, along with digital instrumentation that pairs a speedometer with an arcing bar-style tachometer.
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