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Motorcycles Specs > Yamaha > Yamaha YB-1 Four

Yamaha YB-1 Four Specs

The Yamaha YB-1 Four model is a Classic bike manufactured by Yamaha . In this version sold from year 2002 , the dry weight is 83.0 kg (183.0 pounds) and it is equiped with a Single cylinder, four-stroke motor. The engine produces a maximum peak output power of 4.10 HP (3.0 kW) @ 7500 RPM and a maximum torque of 4.00 Nm (0.4 kgf-m or 3.0 ft.lbs) @ 6000 RPM . With this drive-train, the Yamaha YB-1 Four is capable of reaching a maximum top speed of  . Regarding the chassis characteristics, responsible for road holding, handling behaviour and ride confort, the Yamaha YB-1 Four have a  frame with front suspension being  and in the rear suspension it is equiped with  . Stock tire sizes are  on the front, and  on the rear. As for stopping power, the Yamaha YB-1 Four braking system includes Expanding brake size  at the front and Expanding brake size  at the rear. 

Yamaha YB-1 Four General Information

Brand Yamaha 
Model Yamaha YB-1 Four 
Year 2002 
Year 2002 
Category Classic 
Factory Warranty (Years / miles)  

Yamaha YB-1 Four Dimensions, Aerodynamics and weight

Frame type  
Seat details  
Wheelbase 1,190 mm (46.9 inches) 
Length 1,785 mm (70.3 inches) 
Width 655 mm (25.8 inches) 
Height 960 mm (37.8 inches) 
Seat Height 745 mm (29.3 inches) If adjustable, lowest setting. 
Alternate Seat Height  
Ground Clearance 130 mm (5.1 inches) 
Trail size  
Wheels details  
Front Tyres - Rims dimensions  
Rear Tyres - Rims dimensions  
Front brakes Expanding brake 
Rear brakes Expanding brake 
Front Brakes Dimensions - Disc Dimensions  
Rear Brakes Dimensions - Disc Dimensions  
Curb Weight (including fluids)  
Dry Weight 83.0 kg (183.0 pounds) 
Front Percentage of Weight  
Rear Percentage of Weight  
Weight-Power Output Ratio : 0.0494 HP/kg 
Fuel Tank Capacity 7.20 litres (1.90 gallons) 
Reserve Fuel Capacity  
Carrying Details and Capacity  
Front Suspension  
Front Suspension Travel  
Rear Suspension  
Rear Suspension Travel  

Yamaha YB-1 Four Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, four-stroke 
Engine details  
Fuel system Carburettor 
Engine size - Displacement - Engine capacity 49.00 ccm (2.99 cubic inches) 
Bore x Stroke 36.0 x 48.6 mm (1.4 x 1.9 inches) 
Compression Ratio 9.5:1 
Number of valves per cylinder
Camshaft Valvetrain Configuration SOHC 
Maximum power - Output - Horsepower 4.10 HP (3.0 kW) @ 7500 RPM 
Maximum torque 4.00 Nm (0.4 kgf-m or 3.0 ft.lbs) @ 6000 RPM 
Engine Maximum RPM  
Cooling system Air 
Lubrication system  
Engine oil capacity  
Exhaust system  
Gearbox 4-speed 
Transmission type, final drive ratio Chain 
Clutch type  
Driveline  

Yamaha YB-1 Four Performance

Top Speed  
Acceleration 0 to 100 km/h (0 to 62 mph)  
Acceleration 0 to 400m (1/4 mile)  
Recuperation 60 to 140 km/h in highest gear  
Fuel Consumption - MPG - Economy - Efficiency  
CO2 emissions  
Emissions  

Yamaha YB-1 Four Electrical Systems, Ignition and Equipment

Ignition Type  
Electrical Details  
Starter Type  
Instruments  
Lights