2004 Yamaha YZ 250 Technical Analysis & Specification Breakdown
Built around Yamaha's cross - motocross motorcycle platform, the 2004 Yamaha YZ 250 utilizes a 249 cc (15.2 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 66.4 x 72.0 mm (2.6 x 2.8 inches) with a 9.0:1 compression ratio.
On the scales, the YZ 250 measures 97 kg (214 lbs) dry. Rider ergonomics and chassis geometry center around a 990 mm (39 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,485 mm (58.5 in) wheelbase engineered for balanced agility and highway composure.
Within MotoLibrary's Yamaha archive, this model family spans 5 indexed model years from 2002 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
990 mm (39 in)
Engine
Displacement249.0 ccm (15.19 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression9.0:1
Bore x Stroke66.4 x 72.0 mm (2.6 x 2.8 inches)
CoolingLiquid
Chassis
Front SuspensionTelescopic fork
Front Travel300 mm (11.8 inches)
Rear SuspensionSwinging arm (Monocross)
Rear Travel315 mm (12.4 inches)
Wheelbase1485 mm (58.5 inches)
Ground Clearance391 mm (15.4 inches)
Wheels & Brakes
Front Tyre80/90-21
Rear Tyre110/90-19
Front BrakesSingle disc
Front Brake Ø250 mm (9.8 inches)
Rear BrakesSingle disc
Rear Brake Ø245 mm (9.6 inches)
Dimensions & Weight
Dry Weight97.0 kg (213.8 pounds)
Seat Height990 mm (39.0 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.
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.
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.
