The Boyesen WPK-32AM Water Pump Cover and Impeller Kit is designed to improve coolant circulation and support reliable engine temperature control in select Yamaha two-stroke motorcycles. This kit combines a durable magnesium water pump cover with a precision-engineered impeller to provide efficient cooling performance across a broad range of engine speeds.
Featuring a two-piece cast construction, the cover is engineered for dependable service and includes convenient oil filter access to simplify routine filter changes. The patented Nautilus-style impeller promotes hydrodynamic efficiency, helping increase coolant flow at low, mid-range, and high RPM. This design makes the kit a practical upgrade for riders seeking improved cooling system performance without unnecessary complexity.
Feature: Two-piece cast magnesium construction for strength and durability
Feature: Integrated oil filter access for easier, less time-consuming filter changes
Feature: Increased coolant flow across all RPM ranges
Feature: Patented Nautilus-style impeller designed for hydrodynamic efficiency
Feature: Direct-fit replacement and performance upgrade for compatible Yamaha models
The Boyesen WPK-32AM fits 2016 and 2017 Yamaha YZ250X models, along with Yamaha YZ250 models from 1999 through 2006. Verify the motorcycle model and year before installation to confirm compatibility. Boyesen is the manufacturer and brand, and WPK-32AM is the manufacturer and vendor part number.
Features:
- Two-piece cast magnesium construction for strength and durability
- Oil filter access for easier filter changes
- Increased coolant flow across all RPM ranges
- Patented Nautilus-style impeller for hydrodynamic efficiency
- Fits select 1999-2006 Yamaha YZ250 and 2016-2017 Yamaha YZ250X motorcycles
Fitment:
1999 Yamaha YZ250
2000 Yamaha YZ250
2001 Yamaha YZ250
2002 Yamaha YZ250
2003 Yamaha YZ250
2004 Yamaha YZ250
2005 Yamaha YZ250
2006 Yamaha YZ250
2007 Yamaha YZ250
2008 Yamaha YZ250
2009 Yamaha YZ250
2010 Yamaha YZ250
2011 Yamaha YZ250
2012 Yamaha YZ250
2013 Yamaha YZ250
2014 Yamaha YZ250
2015 Yamaha YZ250
2016 Yamaha YZ250
2016 Yamaha YZ250X
2017 Yamaha YZ250
2017 Yamaha YZ250X
2018 Yamaha YZ250
2018 Yamaha YZ250X
2019 Yamaha YZ250
2019 Yamaha YZ250X
2020 Yamaha YZ250
2020 Yamaha YZ250X
2021 Yamaha YZ250
2021 Yamaha YZ250X
2022 Yamaha YZ250
2022 Yamaha YZ250X
2023 Yamaha YZ250
2023 Yamaha YZ250X
2024 Yamaha YZ250
2024 Yamaha YZ250X
2025 Yamaha YZ250
2025 Yamaha YZ250X
2026 Yamaha YZ250
2026 Yamaha YZ250X