Moose Offroad Water Pump Rebuild Kit 0934-5179 — Honda CRF150R / Expert 2007-2025

Moose Offroad Water Pump Rebuild Kit 0934-5179 — Honda CRF150R / Expert 2007-2025

Product Description

Keep your high-revving mini racer running cool and prevent catastrophic engine overheating with the Moose Offroad Water Pump Rebuild Kit. Modern four-stroke racing engines rely heavily on constant fluid circulation to manage heat, and a compromised water pump can quickly lead to costly head gasket failures or top-end damage. This comprehensive package functions as a premium, direct-fit solution to eliminate coolant weeping, seal degradation, and internal bearing play, ensuring your cooling system operates with maximum efficiency during demanding motocross racing conditions.

Precision-engineered to meet or exceed strict factory specifications, this ultimate rebuild kit eliminates the hassle of tracking down individual internal components. Every package includes precision-ground bearings, high-temperature rubber O-rings, specialized oil seals, the mechanical water pump face seal, premium side cover gaskets, and necessary copper drain washers. By replacing worn factory components with Moose Offroad's heavy-duty design, riders achieve absolute sealing integrity and a reduced parasitic drag profile across the entire water pump shaft assembly, ensuring peak mechanical reliability on the track or trail.

Top Features: Moose Offroad Water Pump Rebuild Kit

• All-In-One Solution: Conveniently bundles every single gasket, specialized O-ring, precision bearing, and seal required for a complete cooling system overhaul.
• Premium Mechanical Face Seals: Features heavy-duty mechanical seal materials designed to stubbornly resist abrasive coolant additives and high-rpm friction.
• Precision Ground Bearings: Features high-load internal bearings that ensure smooth shaft rotation and reduce side-load play that causes premature seal failure.
• Direct OEM Specification Fitment: Tailored directly to matching casing dimensions to guarantee a leak-free interface and seamless installation inside factory engine covers.

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
2007-2025	Honda	CRF150R
2007-2009, 2012-2024	Honda	CRF150R Expert
2010-2011, 2025	Honda	CRF150RB Expert

Frequently Asked Questions

Q: What are the telltale signs that my CRF150R water pump needs a rebuild?
A: The most obvious sign is engine coolant weeping or leaking directly out of the small "weep hole" located on the bottom of the right-side engine crankcase cover. Additionally, if your engine oil looks milky or if you detect side-to-side play on the impeller shaft after removing the outer cover, the internal seals and bearings require immediate replacement.

Q: Is it necessary to press the new water pump bearing into place using specialized shop equipment?
A: Yes, the water pump bearing is typically an interference press-fit into the engine side cover casing. For a proper installation without fracturing the aluminum housing, you should use a mechanical press or an appropriately sized bearing driver tool that applies even mechanical force exclusively to the outer bearing race.

Q: Do I need to apply any liquid gasket sealer or silicone adhesive to the side cover gasket included in this kit?
A: No, the premium perimeter gaskets included in this rebuild kit are specifically engineered to seal perfectly on completely clean, dry mating surfaces. Adding RTV or silicone can slide the gasket out of alignment or squeeze into internal oil galleries, obstructing crucial fluid passages.

Expert Pro-Tip: When installing the delicate mechanical ceramic water pump seal, never use bare fingers or metal tools to push directly against the brittle white face component, as invisible hairline fractures will cause immediate leaking upon fire-up. Instead, apply a light coat of clean water or specialized rubber assembly lube to the outer rubber boot, and use a matching socket or driver sleeve that contacts only the outer metal flange ring to seat the assembly smoothly into the engine cover bore.

Recommended Pairings:
o Honda CRF150R Performance Parts & Upgrades
o Honda 4-Stroke Performance Parts
o Premium Motorcycle Chemicals Performance Parts

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

Moto-House MX – Choice of Champions – Clermont / Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.