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plug in efi tuners

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I am a mechanic in Guam USA. And am involved with some riders , mostly MX racers and I wanted an opinion on the products offered for tuning these efi equipped bikes.

There are several, Weisco, Yoshimura, Bazzaz, etc. Weisco being the most limited and simple.

My question is, without a dyno, how do I get correct aif fuel ratios, ( thru the o2 sensor ) egts etc for proper tuning.

Does anybody make a unit that datalogs for replay?

I have tuned efi vehicles before with AEM standalones.

If you have a recomondation for a product, one with intuitive software I would appreciate it.

Alan

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you need a wideband that data logs. im testing with the aem wifi unit right as well.

as a fyi none of the 3 button tuner boxes have a enough resulotion to actually correct the fueling.

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