Built around Paton's sport motorcycle platform, the 2020 Paton S1_R Lightweight pairs a 649 cc (39.6 cu in) liquid-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 71.1 HP (51.9 kW) at 8,500 rpm while maximum torque reaches 64 Nm (47.2 lb-ft) at 7,000 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 109.6 HP per liter and a 1,500 rpm working window between peak torque (7,000 rpm) and peak power (8,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the S1_R Lightweight measures 158 kg (348 lbs) wet (curb), translating to a power-to-weight ratio of 0.45 HP/kg (2.22 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,390 mm (54.7 in) wheelbase engineered for quick, flickable steering geometry.
Specific Output
109.6 HP/L
Power-to-Weight
0.45 HP/kg (2.22 kg/HP)
Power Band Window
7,000–8,500 rpm
Standover Height
810 mm (31.9 in)
Engine
Displacement649.0 ccm (39.60 cubic inches)
Engine TypeTwin, four-stroke
Power71.1 HP (51.9 kW)) @ 8500 RPM
Torque64.0 Nm (6.5 kgf-m or 47.2 ft.lbs) @ 7000 RPM
Compression10.8:1
Bore x Stroke83.0 x 60.0 mm (3.3 x 2.4 inches)
Fuel SystemInjection. Keihin, 38mmx2
CoolingLiquid
Transmission
Final DriveChain (final drive)
ClutchWet multi-disc clutch
Chassis
Front SuspensionOhlins 43mm upside down forks.
Front Travel120 mm (4.7 inches)
Rear SuspensionOhlins
Rear Travel130 mm (5.1 inches)
Wheelbase1390 mm (54.7 inches)
Wheels & Brakes
Front Tyre120/70-17
Rear Tyre180/55-17
Front BrakesDouble disc
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Weight incl.158.0 kg (348.3 pounds)
Seat Height810 mm (31.9 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.
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.
