Built around Suzuki's naked motorcycle platform, the 2002 Suzuki Grasstracker BigBoy relies on a 249 cc (15.2 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 20 HP (14.6 kW) at 7,500 rpm while maximum torque reaches 21 Nm (15.5 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox. With a specific output of 80.3 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 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 Grasstracker BigBoy measures 127 kg (280 lbs) dry, translating to a power-to-weight ratio of 0.16 HP/kg (6.35 kg per horsepower). Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,405 mm (55.3 in) wheelbase engineered for quick, flickable steering geometry. The 6-liter (1.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Suzuki archive, this model family spans 4 indexed model years from 2002 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
80.3 HP/L
Power-to-Weight
0.16 HP/kg (6.35 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
785 mm (30.9 in)
Engine
Displacement249.0 ccm (15.19 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power20.0 HP (14.6 kW)) @ 7500 RPM
Torque21.0 Nm (2.1 kgf-m or 15.5 ft.lbs) @ 6000 RPM
Compression9.0:1
Bore x Stroke72.0 x 61.2 mm (2.8 x 2.4 inches)
Valves/Cylinder4
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
CoolingAir
Transmission
Gearbox5-speed
Chassis
Wheelbase1405 mm (55.3 inches)
Ground Clearance200 mm (7.9 inches)
Wheels & Brakes
Front Tyre100/90-19 57P
Rear Tyre130/80-18 66P
Front BrakesSingle disc
Rear BrakesExpanding brake
Dimensions & Weight
Dry Weight127.0 kg (280.0 pounds)
Power/Weight0.1575 HP/kg
Seat Height785 mm (30.9 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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
