The Boyesen WPK-18CB Water Pump Cover and Impeller Kit is designed to improve coolant flow and provide dependable cooling performance for select Kawasaki motocross and off-road motorcycles. This black, two-piece cast aluminum assembly combines a durable water pump cover with Boyesen’s patented Nautilus-style impeller, engineered for efficient fluid movement across all engine speed ranges.
The integrated design provides convenient oil filter access, helping simplify routine filter changes without requiring unnecessary disassembly. The cast aluminum construction offers strength and durability for demanding riding conditions, while the hydrodynamic impeller design supports consistent coolant circulation during high-load operation. The finish and fit are tailored for a clean, performance-oriented replacement or upgrade.
Fitment: Fits 2019–2020 Kawasaki KX450F, 2021–2023 Kawasaki KX450F, and 2021–2023 Kawasaki KX450X models. Verify motorcycle year and model before ordering to ensure proper application. This product is manufactured by Boyesen and is identified by manufacturer part number WPK-18CB and vendor part number WPK-18CB.
Features:
- Construction: Durable 2-piece cast aluminum water pump cover and impeller assembly
- Oil Filter Access: Allows convenient access for hassle-free oil filter changes
- Coolant Flow: Increases coolant circulation across all engine speed ranges
- Impeller Design: Patented Boyesen Nautilus-style impeller promotes hydrodynamic efficiency
- Finish: Black finish provides a clean appearance and complements the motorcycle’s engine components
- Fitment: Designed for 2019–2020 Kawasaki KX450F, 2021–2023 Kawasaki KX450F, and 2021–2023 Kawasaki KX450X models
- Brand: Boyesen
- Manufacturer Part Number: WPK-18CB
- Vendor Part Number: WPK-18CB
Fitment:
2019 Kawasaki KX450F
2020 Kawasaki KX450F
2021 Kawasaki KX450F
2021 Kawasaki KX450X
2022 Kawasaki KX450F
2022 Kawasaki KX450X
2023 Kawasaki KX450F
2023 Kawasaki KX450X