AJ1-K10 YBS300 Dirt Bike

L x W x H: 2190 x 820 x 1300 mm
Seat Height: 950 mm
Wheelbase: 1480 mm
Ground Clearance: 330 mm
Fuel Capacity: 8.5 Liters
Dry Weight: 119 kg

Engine & Power

This dual-cam engine delivers 21KW of power and 25N·m of torque, offering strong, linear performance. Its lightweight design improves handling, while excellent cooling ensures stable output with no thermal decay. A balance shaft reduces vibration for a smoother, more comfortable ride. Strong low-end torque makes climbing easier. The clutch is easy to service, and the engine comes with a protective guard. Ideal for high-speed cruising with a broad power band.

Vehicle Configuration
High-strength steel frame with low-pressure integrated rear swingarm for enhanced strength and reduced weight.Radiator return hose and overflow tank are embedded within the frame for a clean, efficient layout.Widened foot pegs made from CNC-machined 7075 aluminum alloy—durable and rider-friendly.Equipped with a high-capacity, cold-start lithium battery that is lightweight and reliable.

Steering & Suspension
Eccentric steering stem with detachable nut allows rake angle adjustment for different riding needs.All-new AJ1-tuned front suspension with adjustable compression/rebound, manual tuning knobs, quick air release, imported bearings, and DLC-coated fork tubes.
8-level damping adjustment, no dead zones, SKF oil seals—smooth response and strong feedback in all terrains.Progressive rear shock with high/low-speed compression and rebound adjustability. Handles big jumps without bottoming out, reducing rider fatigue.
AJ1-developed front and rear disc brakes with high-performance fluid, imported pads, and optimized rotor design—stable braking under all temperature conditions.

Wheels & Drivetrain
CNC-forged hubs, GLM rims, stainless spokes, 7075 aluminum nipples, imported bearings, and fluororubber oil seals.All axles made from heat-treated 40Cr steel.7075-T6 aluminum sprocket and KMC gold-purple chain with high strength, tensile resistance, and self-lubrication.Wave-pattern air filter foam increases intake area; each unit is precisely oiled and weighed to prevent dust entry and extend engine life.