Air 4orce tunable intake tract.

Has anyone tested these yet? MXA magazine tried it and liked it enough to give it 5 stars for a yz250f.

According to MXA, this is an air boot with 2 different velocity stacks to choose from, a short and a long. Their test riders all stated they felt a noticeable difference from stock and between the 2 choices. The dyno backed this up with a 1 hp gain.

A 1 hp gain from a bolt on is worth looking into.

I think a gain is good, assuming it is where you need it.

Anytime you do something like this, you are robbing Peter to pay Paul. That gain is offset by a loss someplace else. The loss may not matter, it may matter a lot, you have to carefully study dyno sheets to determine if the loss is accetable for the gain.

Anytime you do something like this, you are robbing Peter to pay Paul. That gain is offset by a loss someplace else. The loss may not matter, it may matter a lot, you have to carefully study dyno sheets to determine if the loss is accetable for the gain.

Well did you try it?

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