Actually the O.S. speed has 3 induction ports and 1 exhaust port.
The JX Ninja has 5 induction ports and 1 exhaust port.
The Ninja costs considerably less and runs freakin awesome with the Ninja pipe. One of the best race combos out. However I kind of have to agree with everyone else here. If your just starting out buy a cheaper engine in the begining. For me it's not so much the power, but rather your lack of experience. Most guys new to nitro burn up the first engine learning how to tune. Some go through a few more than that even. Don't what to hear you bad mouthing the Ninja engine when it was your lack of tuning skill that killed it early. Once you get some experience tuning go ahead and get the high $$$ engine.
