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J1 is a full size bike of BOSUER dirt bike series. It is equipped with ZS CBS300 engine, water cooled, with internal balance shaft. The engine power is 18.5kw at 8500rpm, 4 valves. The bike is designed for dural popures.




ZS CBS 300cc,water cooled,4-valve,inner balance crank shaft, E&kick start,5 gear

product Descriptions

Chassis is one of BOSUER full size steel frame with linkage, formed steel parts and strengthened steel pipe structured together making the whole bike  solid enough not only for dural popurse but also for competition.

Swing arm, triple clamp, linkage are in alloy material to reduce weight of whole bike maximally.

The suspenssion are adjustable both front and rear.Brake sysytem are deisgned by BOSUER exclusively with MOJO logo as upgrade parts of the bike.



Engine: ZS CBS300S 4-valve engine, 4-stroke, internal balance shaft, 6-speed, electric 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

ENGINEEngine Type:ZS CBS 300cc,water cooled,4-valve,inner balance crank shaft, E&kick start,5 gear
Bore X Stroke:74 x 65 mm
Compression Rate:10.7:1~11.3:1
Max Power:18.5kw/8500rpm
Max Torque:23N.m/7000rpm
Valve System:5-speed
Carb:Carburetor PWK34
Gear Ratio#520 chain, 13T/49T
CHASSISFrameHigh strengthened steel frame, structured & engineered by BSE
Swing ArmHigh strengthened alloy swing arm, 18inches
Triple ClampForged alloy
SuspensionFront fork:53/58.5-910mm, compression & rebound adjustment
Rear shock:480mm external air bag, compression & rebound adjustment
BrakeDisc brake, 240/240mm disc
WheelCNC alloy hub, 7 series alloy rim, tire: 80/100-21 140/90-18
DIMENSIONSMax Loading90kg
Tank Capacity6.5L
Wheel Base1450mm
Seat Height920mm
Net Weight117±1kg
Package Size1860*580*1080mm
Package Weight138±1kg

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