An important part of this bike and it's history is "Race Mode". When the bike was released at the end of 1983 and over the few years following there were many rumours about a secret "race mode" that was built in to the stock ECU by Kawasaki and allowed the bike to run more boost. But in 1984, when this bike was already one of the fastest you could buy, the prospect of even more hp with only minimal modification would have made this bike WAY faster than anything else, including the all-new liquid-cooled GPz900R which was released few months later and was to be the flagship of the new range of 16 valve bikes. So, as far as we can tell this information was not generally released immediately.

In 2001 750turbo.com received a copy of the following Kawasaki technical bulletin from Greig Frankham in Australia, which gives full details of race mode. The bulletin specifically excludes USA models so as not to land Kawasaki USA in trouble with the EPA, but read on....

This mod has since been tried by dozens, if not hundreds, of 750turbo.com members with great results. The unmodded bike will cut out, rather violently sometimes, at 12psi boost (stock boost is 7-10psi but 12psi can be reached with non-standard exhausts and/or air filter alone). The "race moded" bike will carry on to 26psi (if you set the wastegate that high), and carries on delivering extra fuel as boost increases. Fine tuning with either a combination of TPS and fuel pressure adjustments, or a Powercommander, is desirable however and owners should monitor air/fuel ratios carefully. The air scoop is not recommended.

Other site members including those in the USA have since confirmed that this mod works on all 750 turbos. It's also worth noting that Mike Chestnut at HPU claims that this mod results in a default "get you home" map, not a race mode, and that race mode is only available from his own modified ECUs combined with the wiring mod described here. 750turbo.com reject that explanation, as a "get you home" mode would be documented in the manual and also would give a DFI warning on the tank console. The truth is, no ECU modification is necessary, the wiring mod alone delivers extra fuel and allows high boost levels.

The following document is the Kawasaki technical bulletin. Some of the writing is a little vague, and can be confusing. Further guidance is available in the forum. Note that for a quick, reversible, way to activate race mode all you need to do is remove the brown wire from the ECU.