Hmmm. Not sure you can buy one, at least not for the NSR.
Some folks have tried to get one working, but found it very hard to make the bike run well. The problem with pressurising, is that you end up with a disparity between the pressure of air in the venturi, and the pressure of air above the fuel in the float bowls if you do not also pressurise the bowls.
Does that make sense?
Maybe you can be the first!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball