696 termis
I lost gas mileage with the addition of termis, racing ignition, and open airbox. There was a very noticeable power gain. I would guess it to be around an 8 - 10 percent gain. Before the exhaust mods, I had a trouble pulling big power wheelies, now the front comes up to the balance point no problem. I have since then added a 14t sprocket which seems to make the bike run a lot smoother, giving it more low end torque.
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