Yamaha M1 prototype from 2003 that had two rear shocks.

https://www.motogp.com/en/news/2003/02/24/yamaha-unveil-new-m1-prototype-in-jerez/134434https://www.motogp.com/en/news/2003/02/24/yamaha-unveil-new-m1-prototype-in-jerez/134434 https://photos.motogp.com/2015/01/29/134434.big.jpg