Dual clutch fluid reservoirs?

[xxaarraa]

I was watching this video and at :42 seconds, you can see two clutch fluid reservoirs mounted on the left handlebar, in addition to the brake fluid reservoir on right side.

MV Agusta WSBK Leon Camier #2 (2017) Exterior and Interior in 3D - YouTube

Anyone know what the second one does?!?

[ZX-12R]

I'm going to guess that it's a thumb brake. Take a look at the left hand controls and you can see what looks like a thumb lever below the grip.

[xxaarraa]

I'm going to guess that it's a thumb brake. Take a look at the left hand controls and you can see what looks like a thumb lever below the grip.

Very interesting...

Lorenzo to test thumb-operated braking system in Australia

[Paul_E_D]

Yes. Lots of gp guys using it so they can get the bike to turn mid corner

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[Pigman]

Yes. Lots of gp guys using it so they can get the bike to turn mid corner

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They have such a high Gforce I am sure keep both feet planted helps a ton....then to get the rear trail break out of the turn, allows a lot more throttle and faster exit

[aldend123]

LHRB - Left Hand Rear Brake. There are kits to do this, though I think some are just doing it custom. Some dirtbikers/trials riders and stunt riders install them.