Jianshe Knight JS125 4X-F2 - Specifications & Review

Knight JS125 4X-F2

Article Complete Info

Articleid115468
CategorySport
MakeJianshe
ModelKnight JS125 4X-F2
Year2008

Chassis, Suspension, Brakes & Wheels

FrontbrakesSingle disc
Fronttyre2.75-18
RearbrakesExpanding brake (drum brake)
Reartyre3.00-18

Engine & Transmission

Borexstroke54.0 x 54.0 mm (2.1 x 2.1 inches)
ClutchWet type,muti plate,hand operation
Compression10.0:1
CoolingsystemAir
Displacement123.00 ccm (7.51 cubic inches)
EnginedetailsSingle cylinder, four-stroke
Gearbox5-speed
IgnitionCDI
Power8.18 HP (6.0 kW))
Torque8.00 Nm (0.8 kgf-m or 5.9 ft.lbs) @ 5500 RPM

Other Specifications

StarterElectric & kick

Physical Measures & Capacities

Dryweight115.0 kg (253.5 pounds)
Fuelcapacity14.50 litres (3.83 gallons)
Groundclearance160 mm (6.3 inches)
Overallheight1,085 mm (42.7 inches)
Overalllength2,060 mm (81.1 inches)
Overallwidth740 mm (29.1 inches)
Powerweightratio0.0711 HP/kg
Seatheight775 mm (30.5 inches) If adjustable, lowest setting.

About Jianshe

Country of Origin: China
Founder: Jianshe Industries (state-linked; Chongqing)
Best Known For: High-volume commuters and partnerships (including with Yamaha) for quality uplift

Company History

Jianshe’s footprint spans civilian commuters, utility machines, and defense manufacturing capacity. Its joint ventures—most notably with Yamaha—brought process control, supplier vetting, and documentation practices that raised product consistency and safety. On the street, Jianshe-badged 100–200 cc machines do the invisible work of mobility: delivery service, school runs, and rural trips where bus schedules fail. The company’s export partners tailor suspension, tires, and lighting to local realities, and maintain spares that keep uptime high. Over the last decade Jianshe’s EFI, loom sealing, and braking packages have improved markedly, reflecting regulatory pressure and joint-venture learning. Historically, Jianshe is a case study in industrial evolution: state factories becoming competitive consumer-goods producers through partnership and volume. For riders, the benefit is practical—a new bike that starts reliably and gets cheap parts, the kind of quiet progress that changes daily life.

Other Years

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