2009 Big Dog Mastiff Technical Analysis & Specification Breakdown
Engineered by Big Dog for the custom - cruiser motorcycle segment, the 2009 Big Dog Mastiff utilizes a 1917 cc (117 cu in) v2, four-stroke layout. Internal engine geometry specifies a bore and stroke of 104.8 x 111.1 mm (4.1 x 4.4 inches) with a 9.6:1 compression ratio.
On the scales, the Mastiff measures 321.1 kg (708 lbs) dry. Rider ergonomics and chassis geometry center around a 616 mm (24.3 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,969 mm (77.5 in) wheelbase engineered for planted straight-line stability. The 17.78-liter (4.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Big Dog archive, this model family spans 4 indexed model years from 2008 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
