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MR300S is a profesional competition bike of BOSUER M series dirt bike. The equipped with 300cc, double camsahft, water cooled, with internal balance shaft. Engine power is 23kw at 8500rpm, 4 valves.




300cc , 4-stroke,4-valve,water-cooling, double overhead camshaft, with balance shaft

product Descriptions

MR300S frame is made of alluminume. Forged alloy parts with strengthened formed alloy pipe connect together make the structure of the frame. With T4 & T6 treatment, the frame is not only less weight but also solid enough for competition.

Other parts, such as rim, hub are all made of alluminume to reduce weight of the whole bike.Brake system are designed by BOSUER exclusively, new shape discs, double piston, MOJO brand as upgrade parts BOSUER.21" front Rim and 18" rear rim are 7 series alloy, hollowed CNC alloy hub.



Engine: ZS NC300S 4-valve engine, double camshaft, 4-stroke, internal balance shaft, 6-speed, electric and kick start

Frame: steel full size dirt bike frame with linkage, alloy swing arm

Wheel: front 21", rear 18"

Suspension: adjustable

Brake system: Mojo brake, 2 pistons of front brake, 1 pistion rear

Muffler: stainless steel with power bomb

ENGINEEngine Type300cc , 4-stroke,4-valve,water-cooling, double overhead camshaft, with balance shaft
Bore X Stroke(mm)82.0×53.6mm
Expression Rate11.8:1
Max Power23kW/9000rpm
Max Torque25N.m/7000rpm
Chain/Sprocket520-13/520-52CNC sprocket
CHASSISFuel Capacity6.5L
Handle BarAlloy, fat type, Ф28.5
Triple ClampForged alloy 6061
FrameEmbracing high strengthened formed alloy
Swing ArmFormed alloy, knife shape
SuspensionFront fork: 54/60-930mm, damping adjustment
Rear shock: 480mm , inner box, damping adjustment
Disc BrakeDisc brake, disc size: front:240mm / rear:240mm 
WheelAlloy rim, CNC hub, rim size: front: 1.60-21/rear: 2.15-18
TireTire size: front: 80/100-21 / rear: 100/90-18
DIMENSIONSMax Loading90kg
Seat Height940mm
Wheel Base1450mm
Net Weight116±1KG
Package Size1860*580*1080mm
Gross Weight137±2KG

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