Vertex Water Pump Rebuild Kit 821943 — Honda Rancher / Foreman / Rubicon / Pioneer 500 2007-2025

Vertex Water Pump Rebuild Kit 821943 — Honda Rancher / Foreman / Rubicon / Pioneer 500 2007-2025

Product Description

Keep your utility machine working cool under pressure with the Moose Offroad Vertex 821943 Water Pump Rebuild Kit. Engineered specifically for heavy-duty Honda 4-stroke ATVs and side-by-sides, this comprehensive service bundle takes the guesswork out of restoring your mechanical cooling system. A weeping or failing water pump can rapidly lead to cooling pressure loss, oil contamination, or devastating engine overheating. Installing this **premium water pump repair kit** restores proper fluid circulation and maintains optimal engine temperatures during long days on the farm or tight trail rides.

Every element in this kit is manufactured from top-tier materials built to handle the intense temperature cycles and dirty operating environments common to utility vehicles. The kit includes precision-matched bearings to ensure frictionless shaft rotation alongside rugged, high-grade rubber seals and mechanical face seals that completely lock engine coolant in and keep abrasive mud out. This direct drop-in overhaul kit eliminates minor leaks before they turn into expensive mechanical failures, keeping your Honda FourTrax or Pioneer completely dependable.

Top Features: Vertex Water Pump Rebuild Kit

• All-In-One Overhaul Setup: Contains every required gasket, specialized O-ring, bearing, and oil seal needed to complete a total water pump rebuild.
• Engineered Fit Kit: Includes precise bearings, rubber casing seals, heavy-duty mechanical water pump seal, side cover gasket, water pump casing gasket, replacement shaft snap rings, and copper drain washers.
• OEM Precision and Integrity: Built strictly to factory specifications to guarantee a leaks-free fitment and ensure long-term pressure holding capacity.
• Extreme Environment Materials: Formulated to survive constant exposure to high engine heat, radiator pressures, and external trail debris.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2025	Honda	TRX420FA6 FourTrax Rancher 4x4 Auto DCT IRS EPS
2020-2025	Honda	TRX520FA6 FourTrax Foreman Rubicon Auto DCT EPS
2020-2025	Honda	TRX520FM6 FourTrax Foreman Rubicon EPS
2020-2025	Honda	TRX520FM1 FourTrax Foreman 4x4
2020-2024	Honda	TRX520FA5 FourTrax Foreman Rubicon Auto DCT
2020	Honda	SXS500M2 Pioneer 500
2017-2024	Honda	TRX420FA5 FourTrax Rancher 4x4 Auto DCT IRS
2017-2019	Honda	TRX420 Rancher TE ES
2015-2019	Honda	TRX500FM6 FourTrax Foreman Rubicon EPS
2015-2019	Honda	TRX500FA Foreman Rubicon 4x4
2014-2025	Honda	TRX420FM1 FourTrax Rancher 4x4
2014-2025	Honda	TRX420TM1 FourTrax Rancher
2014-2024	Honda	TRX420FE1 FourTrax Rancher 4x4 ES
2014-2019	Honda	TRX500FM1 FourTrax Foreman 4x4
2014-2016, 2020-2024	Honda	TRX420TE1 FourTrax Rancher ES
2014-2016	Honda	TRX500FE1 FourTrax Foreman 4x4 ES
2012-2013	Honda	TRX500FPM FourTrax Foreman 4x4 w/ Power Steering
2012-2013	Honda	TRX500FPE FourTrax Foreman 4x4 ES w/ Power Steering
2012-2013	Honda	TRX500FE FourTrax Foreman 4x4 ES
2012-2013	Honda	TRX500FM FourTrax Foreman 4x4
2011-2013	Honda	TRX420FPE Rancher ES 4x4 w/ Power Steering
2011-2013	Honda	TRX420FPM Rancher 4x4 w/ Power Steering
2007-2013	Honda	TRX420TM FourTrax Rancher
2007-2013	Honda	TRX420FE FourTrax Rancher 4X4 ES
2007-2013	Honda	TRX420FM FourTrax Rancher 4X4
2007-2013	Honda	TRX420TE FourTrax Rancher ES

Frequently Asked Questions

Q: Does this kit include the critical mechanical water pump face seal?
A: Yes, the Vertex kit comes fully loaded with the application-specific mechanical seal along with all essential oil seals, case gaskets, and copper washers required for a leak-free repair.

Q: Can I replace the water pump seals without removing the entire engine?
A: Yes, on most Honda utility models like the Rancher and Foreman, the water pump assembly can be accessed and fully serviced from the rear/side casing without removing the engine block from the frame.

Q: Why is my Honda ATV leaking coolant out of a tiny hole under the front engine case area?
A: That is the built-in inspection or weep hole. When the internal mechanical seal fails, fluid bypasses the shaft and exits there to alert you that your water pump components require an immediate rebuild.

Expert Pro-Tip: When dismantling a Honda utility water pump, pay close attention to the small spring-loaded mechanical seal. Clean the pump shaft completely using ultra-fine scotch-brite or emery cloth before mock assembly. Any residual corrosion or calcium scaling will slice right through your brand-new seals on startup. Always apply a dab of clean high-quality coolant or assembly grease to the mechanical face and oil seal lips so they don't spin dry during the initial startup sequence.

Recommended Pairings:
o All Quads/ATV Performance Parts & Upgrades
o Honda All Performance Parts
o Premium Engine Chemicals & Coolants

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