This is a genuine OEM Yamaha water pump assembly removed from a YZF-R1 (2004–2008). Part number: 4C8-12420-21-00
✅ 100% original Yamaha component — not aftermarket ✅ All gears, housing, and fittings are intact ✅ Spins smoothly with no shaft play ✅ Minor cosmetic wear from normal use ✅ Ideal replacement for damaged or leaking water pump
