![]() If you try using it without fuel commander, you risk losing a lot of low end torque.Īt high RPM, you'll gain a lot of HP though, because the bike will be running at peak efficiency If your exhaust is in any way or form less restrictive than the stock exhaust, it will need a fuel commander of some sorts. Stock, it is properly tuned for city riding. ![]() You will notice on a stock Yamaha, the extra push of power, when the FI gives the bike the fuel it needs for HP. Most vehicles run lean in the mid-range (1.5-5.5k rpm). Increasing it more, beyond the fuel efficient peak, will reduce fuel efficiency but increase HP.Īt full throttle it runs how it should run. Increasing the fuel will result in more fuel efficiency. It runs so lean that it actually runs below optimal parameters. ![]() Almost all vehicles in production by all manufacturers (cars, motorcycles, even airplanes) run lean by federal regulations on emissions. ![]()
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