2009 Yamaha Big Bear 250 Technical Analysis & Specification Breakdown
At the heart of the 2009 Yamaha Big Bear 250 atv motorcycle, Yamaha relies on a 230 cc (14 cu in) air-cooled single cylinder, four-stroke powerplant. Internal engine geometry specifies a bore and stroke of 71.0 x 58.0 mm (2.8 x 2.3 inches) with a 8.7:1 compression ratio.
On the scales, the Big Bear 250 measures 206.8 kg (456 lbs) dry. Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,171 mm (46.1 in) wheelbase engineered for quick, flickable steering geometry. The 12.11-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 2009 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
780 mm (30.7 in)
Engine
Displacement230.0 ccm (14.03 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression8.7:1
Bore x Stroke71.0 x 58.0 mm (2.8 x 2.3 inches)
Fuel SystemCarburettor. Mikuni® 33mm BSR
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionDC - CDI
CoolingAir
Transmission
Gearbox5-speed
Final DriveShaft drive (cardan) (final drive)
Chassis
Front SuspensionMcPherson strut, 4.9-in travel
Rear SuspensionSwingarm
Wheelbase1171 mm (46.1 inches)
Ground Clearance150 mm (5.9 inches)
Wheels & Brakes
Front Tyre25/7-12
Rear Tyre25/10-12
Front BrakesDouble disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight206.8 kg (456.0 pounds)
Seat Height780 mm (30.7 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.
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.
