See: Mugen Seiki

Mugen Seiki have introduced the new Ninja JX21-B05 nitro engine. The JX21B05 features a 3-port long-stroke design that offers smooth low-end power and exceptional mid to top-end power. The crankcase, back plate and carburetor feature a new design. The new DLC-coated crankshaft is silicone filled and has two tungsten counterweights for smooth rotation and better balancing. The new fuel-efficient 22E carburetor is easy to tune and provides great throttle response and smooth acceleration. The B05 comes with a lightweight cooling head to provide exceptional cooling and stable operating temperatures. An o-ring between the cooling head and the combustion camber creates a better seal and reduces vibration.


  • Ninja JX21B05 engine. 3-port configuration delivers great power and fuel consumption.
  • Long stroke design provides smooth low-end power and exceptional mid to top-end performance.
  • Easy to tune fuel-efficient 22E carburetor.
  • Tungsten weighted and silicone filled crankshaft with DLC coating.
  • P3 turbo glow plug.
  • Aluminum 6.5mm reducer.
  • Dust cap set.
  • Exhaust gasket.