Complete high-performance water pump rebuild kit engineered to restore cooling system efficiency, stop leaks, and prevent bearing failure. Includes precision micro bearings, high-pressure and temperature-resistant mechanical and rubber seals, and the necessary water pump cover gasket or O-ring to handle demanding engine operating conditions.
Specs & Details
- Manufacturer Part Number: 421-W0017
- Alternative Part Number: Hot Rods WPK0017
- Kit Type: Water Pump Mechanical Seal, Bearing, and Gasket Kit
- Materials: High-temp rubber, mechanical face seals, and precision steel micro-bearings
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 250 | Two-Stroke Motocross | 1999–2021 |
| Yamaha | YZ 250X | Two-Stroke Cross-Country | 2016–2021 |
TSO Garage Note
An essential maintenance fix when you spot coolant weeping from the weep hole or notice play in the water pump shaft. Instead of hunting down individual factory seals and bearings, this all-in-one Hot Rods kit bundles everything needed to refresh the cooling circuit, protect against overheating, and keep coolant out of your transmission oil during a teardown or routine service.
