2009 Yamaha YBR125

Technical Specifications

Engine

• Type - Air-cooled, 4-stroke, forward inclined single cylinder, 2-valve, SOHC
• Displacement - 124 cc
• Bore x stroke - 54.0 x 54.0 mm
• Compression ratio - 10.0:1
• Max. Power - 7.5 kW (10 PS) @ 7,800 rpm
• Max. Torque - 9.6 Nm (0.98 kg-m) @ 6,000 rpm
• Lubrication system - Wet sump
• Fuel supply system - Fuel Injection
• Clutch type - Wet, multiple-disc
• Ignition system - TCI
• Starter system - Electric and Kick
• Transmission system - Constant mesh, 5-speed
• Final transmission system - Chain
• Primary reduction ratio - 68/20 (3.400)
• Secondary reduction ratio - 45/14 (3.214)
• Gear ratio, 1st gear - 37/14 (2.643)
• Gear ratio, 2nd gear - 32/18 (1.778)
• Gear ratio, 3rd gear - 25/19 (1.316)
• Gear ratio, 4th gear - 23/22 (1.045)
• Gear ratio, 5th gear - 21/24 (0.875)

Chassis

• Frame - Diamond shaped
• Front suspension - Telescopic forks
• Front wheel travel - 120 mm
• Rear suspension - Swingarm
• Rear wheel travel - 105 mm
• Caster angle - 26º 20'
• Trail - 90 mm
• Front brake - Single disc, Ø 245 mm
• Rear brake - Drum, Ø 130 mm
• Front tyre - 2.75-18 42P
• Rear tyre - 90/90-18M/C 57P

Dimensions

• Overall length - 1,980 mm
• Overall width - 745 mm
• Overall height - 1,080 mm
• Seat height - 780 mm
• Wheelbase - 1,290 mm
• Min. ground clearance - 175 mm
• Wet weight (including full oil and fuel tank) - 124 kg
• Fuel capacity - 13 litres
• Oil capacity - 1.2 litres

Specification are subject to change without notice, in accordance with national regulation and legislations