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Hayabusa Gen2 AFR target table.. Your opinion ?

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Please take a look at my afr target for this Hayabusa Generation 2 as a starting point. Dyno sessions follow later. Any comment will be greatly appreciated.

Thanks guys

Fuel 95 Gasoline

Altitude Sea level

Temp 30 - 35 deg C

Mod: Yoshimura full race exhaust 4-2-1, KN Air cleaner

PS: the zeroes are in place to disable the Autotune (due to exhaust flow reversions and where it is not needed) in the respective cells.

Attached Files

I'd say that you've got a safe and sensible starting point. If you're interested at all in economy then you could lean out the midrange targets towards 14.7:1, particularly at lower rpm. You may also find that the engine responds by targeting slightly leaner at WOT, particularly at high rpm. The last hyabusa engine I tuned I ended up with a WOT AFR around 13.4 tapering to 13.2. Your starting point is safe though so I'd just test and see how it responds.

I agree with Andre. I own 2 hayabusa's. One is an all out drag bike and the other is set up for drag and street. I tune both of them plus all the ones that come thru our shop. Your starting point is perfect for a starting tune on a stock motor. It should need less fuel in the end.

Thank you both for taking the time to review and comment my table !

Be shure to post your results. ECU editor will give you a lot more tuning capability than a power commander but it takes a lot longer and you can't make changes in real time.

We usually reply within 12hrs (often sooner)

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