GPZ900R Raced Injected before 1990

[Neil Trama]

Hello all,
Does anyone know of any GPZ900R actually raced with fuel injection prior to 1990 and can provide bona-fide evidence to that effect please?

I reckon someone must have, even if unsuccessfully, before 1st January 1990, especially given that the GPZ1100 and GPZ750 Turbo were well into production in that period.

Thank You,
Neil

[Gosling1]

OK here are some facts on factory kawasaki fuel injection.

The GPz1100 was fitted with EFI in 1981. It was then fitted with DFI (digital) injection for 1982 through 1985 models, before being discontinued in favour of carbs with the 1984 GPz900R. The 750Turbo was fitted with DFI for its 2 model years of 1984 and 1985.

Fuel injection was not *well into production* by 1990 - it had actually been out of production for the best part of 1/2 a decade. The first injected kawasaki sports bike after the early 80's was to the best of my knowledge, a ZX6R model of about 2002 ? or thereabouts anyway.

They stopped racing GPz900's in proddie racing - at least factory-supported models - about 1987. This was the same time that the capacity limit for Aussie production racing was reduced to 750cc, and models like the Gixxer 750, VFR/RC30 Honda and YZF 750 ruled the roost in almost every racing series across Australia. Nobody was racing GPz900R's by 1990 - anywhere. Least of all fitted with fuel injection. Nobody was using fuel injection in any racing classes that I can think of, wether they were proddie racing or racing on the early version of superbikes.

I reckon you won't find any evidence anywhere of a GPz900R being raced with any form of fuel injection. Sorry - believe me if I could help I would. I owned the only single example of a Period 5 bike racing in the country which was fitted with EFI as a stock bike - a 1980 Z1000H. This bike came 5th outright in the NSW PCRA Club championships in 2001, before fuel injection was banned from Period 5 in 2002. If you are looking to have fuel injection permitted in Period 6 racing on your 900R - good luck. You would get better performance for cheaper with just a set of FCR Keihins.

I will contact Phil Hall (fezzick) from this forum - Phil has a pretty good knowledge of just about every bike that ever raced across Oz in those days, as he commentated at many many meetings. If there was an injected GPz900R out there racing, Phil may know about it.................but I am 100% sure there were none at all. Injection was seen as costly, complex and providing no better fuel delivery than a wel-sorted set of flatslides.....

[Neil Trama]

Gosling1,
Thank you for the detailed and well considered reply.
The current project is not for competition, it is just my road bike.
A friend dropped around the other day to have a look at my project and the discussion turned around to historic racing as he has raced motorcycles. I told him of what we do with modern engine management and data analysis in high tech forms of car racing (e.g. Aust GT Championship), so discussion of its applications for P6 might be.
At the moment, we are talking about little more than academic curiosity.
Neil

[Gosling1]

no probs - you could always throw a Megasquirt system onto a 900R, that would work fine for a road application.

[Neil Trama]

Gosling1,
My bike is about 4 hours from starting. I began the conversion on friday. I can't spend all of my time on my own bike, but it should be running this weekend.
I do tuning and data analysis using Motec systems. The reason for fitting to my bike is to stay current with the latest editions of the software.
Neil

[Gosling1]

you can call me Gos mate Gosling1 is so formal

Will look forward to an update on your 900R injection conversion