2026 QJMOTOR Sai 921 Pro Four-cylinder powerhouse, 129 horsepower + top-tier electronic control

At first glance of the Sai 921 Pro, it carries forward the aggressive sportbike design language of the QJMOTOR Sai series family. Its low, sleek body profile, towering fuel tank, and upturned tail create a standard track-ready stance. The most noticeable change lies in the paint finish; the new model adopts the high-end "three-coat two-bake" painting process (commonly used in premium sedans), significantly enhancing the paint's richness. It is available in four color schemes, including Sea Salt White and Glittering Gold, giving the actual bike a strong sense of premium appeal.

At its core, it is equipped with a six-axis IMU inertial measurement unit, which enables cornering ABS and full-feature TCS (supporting multi-level intervention adjustment instead of only two modes: "on/off"). It can dynamically adjust the assistance intensity according to the riding posture, greatly enhancing safety during aggressive riding. An electronic throttle and a bi-directional quick shifter system have been added, delivering smoother gear-shifting responses. Whether shifting up during rapid acceleration or down in corners, frequent clutch operation is unnecessary, significantly improving riding convenience. This system is absolutely top-tier among domestic motorcycles. In terms of vehicle configuration, the TFT full-color LCD instrument panel supports smartphone connectivity, navigation projection, and tire pressure monitoring, displaying real-time riding data such as electronic control status, speed, and engine rpm. The inclusion of dual fast-charging ports (USB + Type-C) and a built-in driving recorder further enhances practicality for daily commuting and long-distance riding.

The heart of the Sai 921 Pro is its 921cc inline-four water-cooled engine, which is actually derived from the MV Agusta technical platform. It features a DOHC four-valve configuration with a high compression ratio of 13:1, delivering a maximum power output of 95kW at 10,000rpm (approximately 129 horsepower) and a peak torque of 93N·m at 8,000rpm, with an official top speed of 239km/h. This engine is typically tuned for high-rev performance, with power delivery concentrated in the mid-to-high rev range, making it ideal for riders seeking a thrilling speed experience. Inside the engine, reinforced components such as forged pistons, a DID timing chain, and DLC-coated piston rings are used to ensure stability and durability at high engine speeds. In actual riding, the power output is exceptionally smooth, guaranteeing excellent operational refinement. Its officially recorded 0-100km/h acceleration time places it in the 2-second club, a truly impressive performance for a domestically produced motorcycle.