2021 Sym Joymax Z Plus 125 Technical Analysis & Specification Breakdown
Built around Sym's scooter motorcycle platform, the 2021 Sym Joymax Z Plus 125 pairs a 124.9 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 14.1 HP (10.3 kW) at 9,000 rpm while maximum torque reaches 11.3 Nm (8.3 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 112.9 HP per liter and a 2,000 rpm working window between peak torque (7,000 rpm) and peak power (9,000 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 Joymax Z Plus 125 measures 172 kg (379 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.2 kg per horsepower). Rider ergonomics and chassis geometry center around a 770 mm (30.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,530 mm (60.2 in) wheelbase engineered for planted straight-line stability. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 99 km/h (62 mph).
Within MotoLibrary's Sym archive, this model family spans 3 indexed model years from 2021 to 2024, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
112.9 HP/L
Power-to-Weight
0.08 HP/kg (12.2 kg/HP)
Power Band Window
7,000–9,000 rpm
Standover Height
770 mm (30.3 in)
Engine
Displacement124.9 ccm (7.62 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power14.1 HP (10.3 kW)) @ 9000 RPM
Torque11.3 Nm (1.2 kgf-m or 8.3 ft.lbs) @ 7000 RPM
Fuel SystemInjection
LubricationWet Sump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
Performance
Top Speed99.0 km/h (61.5 mph)
Emission DetailsEuro 5
Chassis
Frame TypeUnderbone
Front SuspensionTelescope fork
Rear SuspensionDual Shock
Wheelbase1530 mm (60.2 inches)
Wheels & Brakes
Front Tyre120/70-14
Rear Tyre140/60-13
Front BrakesSingle disc. ABS.
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc. ABS.
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Dry Weight172.0 kg (379.2 pounds)
Power/Weight0.0819 HP/kg
Seat Height770 mm (30.3 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.
