Upgrade the cooling system on your compatible KTM or Husqvarna motorcycle with the Boyesen WPK-41M Water Pump Cover and Impeller Kit. This performance-focused kit combines a durable magnesium cover with a patented Nautilus-style impeller engineered to improve hydrodynamic efficiency and support consistent coolant circulation throughout the engine’s operating range.
The two-piece cast aluminum construction provides a strong, precise replacement for the original water pump components while maintaining convenient oil filter access for hassle-free filter changes. Increased coolant flow at all RPM ranges helps promote dependable engine temperature control during trail riding, motocross, and other demanding applications. The Boyesen WPK-41M is designed for direct fitment on select KTM and Husqvarna two-stroke motorcycles.
Fitment includes the 2017 KTM 150 XC-W, 2017 Husqvarna TE 150, 2016–2017 Husqvarna TC 125, 2016–2018 KTM 125 SX, and 2016–2018 KTM 150 SX. Verify your motorcycle model and year before installation to ensure compatibility. The manufacturer part number is WPK-41M, and the vendor part number is 59-8631M.
Features:
- Construction: Two-piece cast aluminum water pump cover and impeller design
- Cooling Performance: Provides increased coolant flow across all engine RPM ranges
- Impeller Design: Patented Nautilus-style impeller supports improved hydrodynamic efficiency
- Maintenance Access: Retains oil filter access for convenient, hassle-free filter changes
- Fitment: Fits select 2016–2018 KTM 125 SX and 150 SX models, plus 2017 KTM 150 XC-W and Husqvarna 125/150 models
- Brand: Boyesen
- Manufacturer Part Number: WPK-41M
- Vendor Part Number: 59-8631M
Fitment:
2016 Husqvarna TC 125
2016 KTM 125 SX
2016 KTM 150 SX
2017 Husqvarna TC 125
2017 Husqvarna TE 150
2017 KTM 125 SX
2017 KTM 125 XC-W
2017 KTM 150 SX
2017 KTM 150 XC-W
2018 Husqvarna TC 125
2018 Husqvarna TE 150
2018 KTM 125 SX
2018 KTM 150 SX
2018 KTM 150 XC-W
2019 Husqvarna TC 125
2019 Husqvarna TE 150
2019 KTM 125 SX
2019 KTM 150 SX
2019 KTM 150 XC-W
2020 Husqvarna TC 125
2020 Husqvarna TE 150i
2020 KTM 125 SX
2020 KTM 150 SX
2020 KTM 150 XC-W TPi
2021 Gas-Gas Mc 125
2021 Husqvarna TC 125
2021 Husqvarna TE 150i
2021 KTM 125 SX
2021 KTM 125 XC
2021 KTM 150 SX
2022 Gas-Gas Mc 125
2022 Husqvarna TC 125
2022 Husqvarna TE 150i
2022 KTM 125 SX
2022 KTM 125 XC
2022 KTM 150 SX
2022 KTM 150 XC-W TPi
2023 Gas-Gas Mc 125
2023 Husqvarna TC 125
2023 Husqvarna TE 150i
2023 KTM 125 SX
2023 KTM 125 XC
2023 KTM 150 XC-W