150/90V15 (74V) Dunlop K525 RWL.
(Rear Motorcycle Tyre)
(RWL = Raised White Letters)
The Dunlop K525 is the only tyre considered good enough to be the OE (Original Equipment) tyre for the legendary Drag Strip king, the Yamaha VMX1200 V-Max (the first edition built until 2007).