I'm sure I've seen the ultimate pipe run which has it going into the swingarm itself and is hidden until it pokes out for the caliper.

Still amazes me it's legal to go without a chain guard. If you've ever seen one let go, you'd fit one!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball