J4 is a full size bike of BOSUER series dirt bike. The bike designed as a dural bike. The bike equipped with ZS CB 230 engine, air cooled, 4-stroke, both kick & E start. The engine power is 12kw, it is easy control and stable engine.

  • The engine is fixed with BOSUER featured engine cover engraved with MOJO logo as BOSUER upgrad parts.
  • J4 chassis is made of steel, formed parts and high strengthened steel pipe connect together orgnize the structure.
  • For being a dural bike, J4 equipped with additional 6.5L fuel tank for distant travel, the fuel pumped from rear to main tank.
  • The bike also fixed with passenger’s foot rest and baggage bracket upon tail fender.


Engine: CB250 2-valve engine, 4-stroke, 5-speed, electric and kick start
Frame: Steel full size dirt bike frame with linkage, steel swing arm
Wheel: Front 21″, rear 18″
Suspension: adjustable
Brake system: Mojo brake, 2 pistons of front brake, 1 pistion rear
Muffler & exhaust pipe: stainless steel exhaust pipe, alloy muffler body and nilon end

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product features

Product parameters 

Product parameters 

ENGINEEngineZS CB 223cc,air cooled,2-valve,E&kick start,5 gear
Bore X stroke(mm)69*62.2mm
Expression rate8.3:1-8.9:1
Max Power12KW/7000rpm
Max Torque17N.m/6000rpm
Transmission5 speed
Transmission#520 chain, 13T/45T
CHASSISFrameHigh strengthened steel frame, structured & engineered by BSE
Swing ArmHigh strengthened steel swing arm, 18inches
Triple ClampForged alloy
SuspensionFront fork: 53/58.5-880mm, compression & rebound adjustment
Rearshock: 480mm inner air bag, compression & rebound adjustment
BrakeDisc brake, 240/240mm disc
WheelForged alloy hub, 7 series alloy rim
tire: 80/100-21 100/90-18
DIMENSIONSWheel Base1440mm
Seat Height920mm
Tank Capacity13L (with additional fuel tank)
Dimession2100*810*1260 mm
Net Weight112±1KG
Gross Weight132±2KG
Package Size1860*580*1080mm