Built around Boss Hoss's custom - cruiser motorcycle platform, the 2010 Boss Hoss BHC-9 ZZ4 Trike pairs a 5700 cc (347.8 cu in) liquid-cooled v8, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 355 HP (259.1 kW) at 5,250 rpm while maximum torque reaches 549.2 Nm (405.1 lb-ft) at 4,200 rpm, transferring power to the rear wheel through a automatic gearbox and shaft drive (cardan) final drive. With a specific output of 62.3 HP per liter and a 1,050 rpm working window between peak torque (4,200 rpm) and peak power (5,250 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the BHC-9 ZZ4 Trike measures 680.4 kg (1500 lbs) dry, translating to a power-to-weight ratio of 0.52 HP/kg (1.92 kg per horsepower). Rider ergonomics and chassis geometry center around a 737 mm (29 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 2,070 mm (81.5 in) wheelbase engineered for planted straight-line stability. The 32.17-liter (8.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Boss Hoss archive, this model family spans 3 indexed model years from 2009 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
62.3 HP/L
Power-to-Weight
0.52 HP/kg (1.92 kg/HP)
Power Band Window
4,200–5,250 rpm
Standover Height
737 mm (29 in)
Engine
Displacement5700.0 ccm (347.81 cubic inches)
Engine TypeV8, four-stroke
Engine DetailsV8, four-stroke
Power355.0 HP (259.1 kW)) @ 5250 RPM
Torque549.2 Nm (56.0 kgf-m or 405.1 ft.lbs) @ 4200 RPM
Fuel SystemInjection. Holly 680 cfm Throttle Body
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveShaft drive (cardan) (final drive)
Chassis
Rake35.0°
Front Suspension63mm inverted forks
Front Travel89 mm (3.5 inches)
Rear SuspensionDual 17´ coilover shocks, single 17.5 inch rebound damper
Wheelbase2070 mm (81.5 inches)
Ground Clearance165 mm (6.5 inches)
Wheels & Brakes
Front Tyre130/90-16
Rear Tyre275/60-R15
Front BrakesDouble disc. Dual 4-piston calipers
Rear BrakesSingle disc. 4-piston calipers
Dimensions & Weight
Dry Weight680.4 kg (1,500.0 pounds)
Power/Weight0.5218 HP/kg
Seat Height737 mm (29.0 inches) If adjustable, lowest setting.
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
