This is the Ninja JX21-B04 Off-Road Buggy Engine.  The innovative JX21-B04 engine includes a new fuel efficient carburetor with 6.5mm reducer. The new carburetor provides smoother easy to drive power and increased fuel efficiency.  The B04 comes with a tungsten weighted crankshaft with DLC coating.  The lightweight cooling head provides exceptional cooling and stable operating temperatures.

Includes:

• Ninja JX21-B04 engine.
• Easy to tune fuel efficient carburetor.
• Tungsten weighted crankshaft with DLC coating.
• P3 turbo glow plug.
• Aluminum 6.5 reducer.
• Dust cap set.

　NINJA JX21-B04