Our friends over at Neobuggy got some great info on a new ninja 3 port that is due to be released in July. This will be the JX21B02 line of racing engines for the buggy and truggy. The new 3 port design with a long stroke looks to give a more linear powerband, while the newly designed piston/sleeve, crankcase and crankshaft look to offer better perfomance and more fuel economy.

Source: Neobuggy