You don't use it on a race bike, so it's removed as a weight saver, but then, you only do 15 - 20 miles per race so it gets topped up all the time.

If you only ever ride from home, to home, then yeah you can get rid. Otherwise, it'll be a pain as you'll need to continually top it up anyway...
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball