At the heart of the 1989 Yamaha LB 70 Chappy scooter motorcycle, Yamaha pairs a 65 cc (4 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 4.8 HP (3.5 kW) at 6,000 rpm while maximum torque reaches 5.9 Nm (4.4 lb-ft) at 4,000 rpm, transferring power to the rear wheel through a automatic gearbox and chain final drive. With a specific output of 73.8 HP per liter and a 2,000 rpm working window between peak torque (4,000 rpm) and peak power (6,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the LB 70 Chappy measures 73 kg (161 lbs) dry. Rider ergonomics and chassis geometry center around a 710 mm (28 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,050 mm (41.3 in) wheelbase engineered for quick, flickable steering geometry. The 3.5-liter (0.9 US gal) fuel tank paired with a rated consumption of 3 L/100 km provides an estimated theoretical range of roughly 117 km (73 miles) between fill-ups, while factory top speed is listed at 72 km/h (45 mph).
Specific Output
73.8 HP/L
Power Band Window
4,000–6,000 rpm
Theoretical Range
~117 km (73 mi)
Engine
Displacement65.0 ccm (3.97 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power4.8 HP (3.5 kW)) @ 6000 RPM
Torque5.9 Nm (0.6 kgf-m or 4.4 ft.lbs) @ 4000 RPM
Compression5.8:1
Bore x Stroke47.0 x 42.0 mm (1.9 x 1.7 inches)
Valves/Cylinder2
Fuel SystemCarburettor. Mikuni
Fuel ControlMembrane
Ignitionmechanical
LubricationAutolube
CoolingAir
Max RPM6000
Transmission
GearboxAutomatic
Final DriveChain (final drive)
Clutchautomatic constant mesh
Performance
Top Speed72.4 km/h (45.0 mph)
Fuel Consumption3.00 litres/100 km (33.3 km/l or 78.41 mpg)
Greenhouse Gases69.6 CO2 g/km. (CO2 - Carbon dioxide emission)
Exhaustsingle pipe with catalyzer
Chassis
Frame TypeCrMo steel
Front Suspensionstandard forks
Rear Suspensionmonoshock
Wheelbase1050 mm (41.3 inches)
Ground Clearance135 mm (5.3 inches)
Wheels & Brakes
Front Tyre4.00-8-4PR
Rear Tyre4.00-8-4PR
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight73.0 kg (160.9 pounds)
Power/Weight0.0658 HP/kg
Seat Height710 mm (28.0 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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
