It's a brake lever aadjuster
https://www.bikersdiscountstore.co.uk/brake-clutch-parts-remote-span-adjusters/twm/twm-remote-brake-adjuster-for-accossato-brembo-cylinders-pd-56.php
Right, I see, for a moment I thought something related to the injection.
I think I saw this in a WSB race last week or similar. Adjusting the brakes at 180+mph - rather good skills 😀
@marcom started
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It's a brake lever aadjuster
https://www.bikersdiscountstore.co.uk/brake-clutch-parts-remote-span-adjusters/twm/twm-remote-brake-adjuster-for-accossato-brembo-cylinders-pd-56.php