This is the Ninja JX21-B02 .21 Off Road Competition Racing Engine. Improving on the championship winning Ninja line of engines was a difficult task, but the combined experience and technology at Mugen Seiki Racing and O.S. Engines has created the ultimate power plant for any 1/8 scale buggy or truck.
Mugen Seiki teamed up with O.S. Engines to create this long stroke 3 port engine that features a redesigned piston and sleeve, crankcase and crankshaft for improved performance and fuel economy. The long stroke creates a stronger, more linear power band that pulls hard in the low RPM range, and retains the ability to produce incredible top end power! The light weight 10 fin cooling head sits 8mm lower than the previous Ninja engine, giving the JX21B02 an ultra low center of gravity.
Once again the collaboration of Mugen Seiki Racing, Ninja and O.S. Engines has elevated the JX21-B02 one step above any other engine on the market!
- Low profile light weight cooling head (approx. 8mm lower than the B01A engine)
- New piston & sleeve (3 port long stroke)
- New profile head button
- Black anodized crankcase
- Black anodized carburetor with 7mm restrictor
- New crankshaft with DLC (Diamond-Like Carbon) coating