Cruisers
2009Big Dog Mastiff
31 fields on record
The 2009 Big Dog Mastiff is a heavyweight custom cruiser powered by a massive 1917cc V-twin engine, designed for riders seeking aggressive styling and commanding presence. Known for its low-slung stance and imposing design, the Mastiff appeals to cruiser enthusiasts who prioritize attitude and visual impact. Its carbureted engine and substantial 321kg weight deliver a characterful, raw riding experience typical of American custom motorcycle culture.
- Capacity
- 1917.0 ccm
- Engine
- V-Twin, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 321.1 kg
- Seat height
- 616 mm
- Power
- 96.7 HP (71.1 kW)
What’s new for the 2009 Big Dog Mastiff
vs the 2008| Spec | 2008 | 2009 |
|---|---|---|
| Power | — | 96.7 HP (71.1 kW) |
| Front brakes | Single disc. 4-piston | Single disc. 4-piston diff bore |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a bold styling statement and boulevard cruiser rather than a performance or utility machine.
- Built for
- A rumbling, big-inch V-twin custom with laid-back ergonomics, raked-out front end, and unmistakable American chopper-inspired presence.
- Not ideal for
- Not a good fit for riders wanting agile cornering, off-road capability, or a sporty, high-rev riding experience.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 1917.0 ccm
- Power
- 96.7 HP (71.1 kW)
- Engine type
- V-Twin, four-stroke
- Power/weight ratio
- 0.3012 HP/kg (dry)
- Bore x stroke
- 104.8 x 111.1 mm
- Compression
- 9.6:1
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Electronic Single Fire
- Aspiration
- Naturally aspirated
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Belt
Dimensions & weight
- Wheelbase
- 1969 mm
- Overall length
- 2616 mm
- Seat height
- 616 mm
- Dry weight
- 321.1 kg
- Fuel capacity
- 17.80 litres
- Ground clearance
- 102 mm
- Oil capacity
- 2.80 litres
- Reserve fuel capacity
- 2.60 litres
Chassis & suspension
- Front suspension
- Telescopic
- Rear suspension
- Hidden shocks
- Rake (fork angle)
- 39.0°
- Trail
- 122 mm
Brakes & wheels
- Front brakes
- Single disc. 4-piston diff bore
- Rear brakes
- Single disc. 4-piston
- Front tyre
- 120/70-21
- Rear tyre
- 300/35-18
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2008 | 2009 | 2010 | 2011 |
|---|---|---|---|---|
| Capacity | 1917 cc | 1917 cc | 1917 cc | 1917 cc |
| Dry weight | 321 kg | 321 kg | 321 kg | 321 kg |
| Seat height | 616 mm | 616 mm | 616 mm | 616 mm |
| Fuel capacity | 17.8 L | 17.8 L | 17.4 L | 17.4 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Big Dog Mastiff?
The 2009 Big Dog Mastiff has a Capacity of 1917.0 ccm (116.98 cubic inches).
What engine power does the Big Dog Mastiff have?
The 2009 Big Dog Mastiff has a Power of 96.7 HP (71.1 kW).
How many gears does the Big Dog Mastiff have?
The 2009 Big Dog Mastiff has a Gearbox of 6-speed.
How much does the Big Dog Mastiff weigh?
The 2009 Big Dog Mastiff has a Dry weight of 321.1 kg (707.9 pounds).
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