Three brake calipers on rear wheel, why?

[Ribenapigeon]

I saw a Yamaha mt-07 parked up today and noticed the rear wheel had two extra brake calipers fitted at the rear. Whats that about?

[DRZ4Hunned]

I've seen 'stunt' bikes fitted with them because I think it makes wheelies and such easier to control?
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DRZ400-SM
FZS600

[Ribenapigeon]

[MarJay]

Normally you have a brake lever on the rear grab rail and one on the handlebar so you can bring down highchairs and slow the bike when skitching off of the back. Each connected to a different caliper, with the normal caliper connected to the normal pedal.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[St George]

Couldn't picture doing all that behind my Vespa 200.

[kgm]