New four-cylinder sportbike and V4 automatic cruiser highlight QJMOTOR’s push toward higher-performance motorcycles.

On July 27, QJMOTOR held its 2026 new product launch event at Wenling, Zhejiang, China, introducing two major new models: the SRK 421S four-cylinder sportbike and the SRV 600 V4 AMT automatic cruiser.

The event was centered around the theme of “Making Premium Riding Technology More Accessible.” QJMOTOR aims to bring advanced performance, high-end components, and intelligent riding technologies—previously found mainly on imported premium motorcycles—to a wider range of riders.

The two new models represent different approaches to achieving this goal. The SRK 421S focuses on high-performance sport riding with a four-cylinder engine and upgraded equipment, while the SRV 600 V4 AMT uses automated transmission technology to make large-displacement cruiser motorcycles easier and more approachable to ride.

QJMOTOR SRK421S: A New Generation Four-Cylinder Sportbike

The new SRK 421S is an extensively upgraded version of the SRK 421 and is available in two variants. The Active version is priced at 28,999 RMB, while the Racing version is priced at 32,999 RMB.

Designed by internationally renowned motorcycle designer Adrian Morton, who previously worked with MV Agusta, the SRK 421S adopts a completely new styling direction inspired by the aerodynamics of forward-swept fighter aircraft.

Compared with the previous generation, the new model features a sharper and more aggressive design. The front end incorporates a four-lens LED lighting system, creating a distinctive dual-headlight appearance, while the rear adopts an X-shaped taillight design inspired by Formula 1 racing aesthetics.

The motorcycle also introduces several aerodynamic elements, including a forward-swept wing design, hidden ram-air intake structure, and redesigned body panels that improve both visual impact and high-speed stability.

Power comes from a 421cc inline four-cylinder liquid-cooled engine producing 77.5 horsepower at 14,000 rpm and 39 Nm of torque at 13,000 rpm, with a maximum engine speed of 14,500 rpm.

To enhance the character of the high-revving four-cylinder engine, QJMOTOR has redesigned the exhaust system, optimizing both the appearance and sound performance to deliver a deeper and more refined exhaust note.

The SRK421S is offered in two configurations with noticeable differences in equipment.

The Active version uses a traditional cable-operated throttle system and QJMOTOR’s own braking components, focusing on value and accessibility.

The Racing version upgrades to an electronic throttle system, Brembo braking components, and a Marzocchi rear shock absorber with a gas reservoir. The electronic throttle also enables additional riding features, including a bidirectional quickshifter, cruise control, and three riding modes: Standard, Power, and Rain.

Both versions come equipped with a Marzocchi 12-position adjustable steering damper and cornering ABS, improving stability and safety during more aggressive riding.

The SRK 421S features a lightweight design with a curb weight of 177 kg and a seat height of 790 mm, making it more accessible for riders of different heights.

For electronics, the motorcycle is equipped with a 6.2-inch full-color TFT display supporting smartphone connectivity, tire-pressure monitoring, lean-angle display, and additional riding information.

SRV 600 V4 AMT: A New Automatic V4 Cruiser from QJMOTOR

Alongside the SRK 421S, QJMOTOR also introduced the SRV 600 V4 AMT, priced at 32,999 RMB.

As one of the few V4 cruisers available in the Chinese market, the SRV 600 V4 AMT stands out with its newly developed AMT 4.1 automated manual transmission system.

Unlike traditional motorcycles that require manual clutch operation and foot shifting, the AMT system automatically manages clutch engagement and gear changes, reducing the complexity of riding a large-displacement motorcycle.

According to QJMOTOR, the AMT 4.1 system can complete gear changes in less than 100 milliseconds, offering faster response compared with earlier automatic motorcycle systems.

The system provides three riding modes: Economy, Sport, and Manual. It also includes two shift strategies and additional functions such as creep mode, low-speed cornering assistance, downshift torque compensation, and temporary manual intervention.

The SRV 600 V4 AMT continues to use QJMOTOR’s 561cc V4 liquid-cooled engine, producing 50 kW at 10,500 rpm and 54 Nm of torque at 8,000 rpm.

To enhance the character of the V4 engine, QJMOTOR developed a new staggered four-outlet exhaust system and optimized the exhaust acoustics, creating a deeper and richer engine sound. The chassis and equipment package remain largely consistent with the manual version, including Marzocchi front suspension, radial four-piston brake calipers, dual-channel ABS, tire-pressure monitoring, and smartphone connectivity.

Because of the AMT system, the SRV 600 V4 AMT adopts a revised riding layout, replacing the traditional foot-operated gear lever with a more relaxed cruiser-style setup. The left handlebar also integrates shift controls and riding mode switches.

Although the motorcycle has a curb weight of 224 kg and a long 1,580 mm wheelbase, its low center of gravity and generous steering angle help maintain good maneuverability during urban riding.

QJMOTOR Continues Its Move Toward High-Performance Motorcycles

The launch of the SRK 421S and SRV 600 V4 AMT demonstrates QJMOTOR’s continued expansion into the premium motorcycle segment.

The SRK 421S combines a high-revving four-cylinder engine, international styling, and advanced electronics to strengthen QJMOTOR’s position in the middleweight sportbike category. Meanwhile, the SRV 600 V4 AMT uses automated transmission technology to make a large-displacement V4 cruiser easier and more accessible for everyday riders.

As Chinese motorcycle manufacturers continue moving beyond price competition and focus more on technology, performance, and riding experience, QJMOTOR’s latest products reflect a broader industry trend: making advanced motorcycle technology available to a wider range of riders.