What category is the 2003 Yamaha SR 400?

General information
Category	Naked bike
Model	Yamaha SR 400
Year	2003

Engine and Transmission Specifications
Transmission type,final drive	Chain
Gearbox	5-speed
Cooling system	Air
Fuel control	SOHC
Fuel system	Carburettor
Valves per cylinder	2
Bore x stroke	87.0 x 67.2 mm (3.4 x 2.6 inches)
Compression	8.5:1
Torque	29.00 Nm (3.0 kgf-m or 21.4 ft.lbs) @ 6500
Power	27.00
Engine type	Single cylinder, four-stroke
Capacity:	399.00 ccm (24.35 cubic inches)
Brakes, suspension, Frame and wheels
Rear brakes	Expanding brake
Front brakes	Single disc
Rear tyre dimensions	110/90-18 61S
Front tyre dimensions	90/100-18 54S
Physical measures and capacities
Fuel capacity	12.00 litres (3.17 gallons)
Wheelbase	1,410 mm (55.5 inches)
Ground clearance	140 mm (5.5 inches)
Overall width	750 mm (29.5 inches)
Overall length	2,085 mm (82.1 inches)
Overall height	1,105 mm (43.5 inches)
Seat height	790 mm (31.1 inches) If adjustable, lowest setting.
Power/weight ratio	0.1776 HP/kg
Dry weight	152.0 kg (335.1 pounds)

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

22.9 hp

Peak Power

11.5s

0-60 mph

Best For

Track10%

City75%

Cornering45%

Daily Riding60%

Touring25%

Passenger30%

Rider Profile

Best For	Well suited to beginners and returning riders thanks to its low power delivery, light weight, and simple, forgiving nature.
Purpose	Built as a classic, minimalist standard motorcycle for relaxed street riding rather than outright performance.
Rider Fit	Its low seat height, slim frame, and light overall weight make it accessible to riders of shorter stature or smaller build.
Character	A charming, retro-styled single-cylinder machine that rewards a relaxed, mechanical, kick-start riding experience over speed or technology.
Not Ideal For	Not a good fit for riders wanting highway touring comfort, two-up passenger performance, or any genuine off-road capability.

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

Rider Fit Visualizer

2003 Yamaha SR 400 Rider Ergonomics Assessment

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Feet:

At 790mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2003 Yamaha SR 400, with a relaxed knee angle of around 120 degrees and a forward-leaning 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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