Big Dog K-9 - 2008 Specifications and Reviews

The 2008 Big Dog K-9 is a custom cruiser designed for riders seeking aggressive styling and raw power. Its massive 117cc V-twin engine delivers commanding performance with classic American motorcycle character. Known for bold aesthetics and commanding presence, the K-9 appeals to experienced riders who prioritize distinctive design and straightforward mechanics.

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General information

CategoryCustom / cruiser
Year2008
ModelBig Dog K-9
 
 

Engine and Transmission Specifications

Transmission typefinal driveBelt
Gearbox6-speed
Fuel controlOHV
Fuel systemCarburettor. Optional injection (EFI).
Stroke4
Engine typeV2
Capacity:117.00 ccm (7.14 cubic inches)

Physical measures and capacities

Wheelbase2,083 mm (82.0 inches)
Ground clearance115 mm (4.5 inches)
Overall length2,743 mm (108.0 inches)
Seat height616 mm (24.3 inches) If adjustable, lowest setting.
Dry weight318.0 kg (701.0 pounds)

Big Dog K-9 dimensions and frame

Rear brakesSingle disc. 4-piston
Front brakesSingle disc. 4-piston
Rear tyre dimensions300/35-18
Front tyre dimensionsMH90-21
Trail110 mm (4.4 inches)
Rake (fork angle)39.0°
 
 

Speed and acceleration

Reserve fuel capacity1.51 litres (0.40 gallons)
Fuel capacity16.65 litres (4.40 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track5%
City35%
Cornering25%
Daily Riding45%
Touring45%
Passenger40%

Rider Profile

Best ForThis machine suits a confident, experienced rider who is comfortable managing a long, heavy, low-slung custom cruiser with a wide rear tyre and stretched wheelbase.
PurposeBuilt as a bold styling statement and boulevard cruiser, it's meant for relaxed, image-driven riding rather than outright performance or sport handling.
Rider FitThe low 616 mm seat height makes it approachable for shorter riders, but the 318 kg dry weight and long 2083 mm wheelbase demand strength and care at low speeds and when maneuvering.
CharacterIt has the soulful, torque-heavy pulse typical of a big-inch 45-degree V-twin, delivering laid-back, deliberate power rather than high-revving excitement.
Not Ideal ForThis is not the bike for riders seeking agile cornering, off-road capability, or a light, flickable ride through tight city traffic.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2008 Big Dog K-9 Rider Ergonomics Assessment

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Feet:

At 616mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2008 Big Dog K-9, with a cramped knee angle of around 70 degrees and a slightly forward riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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