EXUP Worldwide was born from the ashes of the original EXUP Brotherhood – the definitive forum for all those who have interest in Yamaha FZ, FZR, and YZF motorcycles.
Okay... this one is finished took it for a ride, and bloody hell!
It's the first bike I've ridden with an exup valve fitted, and it makes a very noticeable difference the engines character, especially how it pulls from low rpm.