Yamaha WR400F Water Pump Rebuild Kit - Vertex Pistons - '98-'00. A complete water pump overhaul kit from Vertex designed to replace worn seals, bearings, and gaskets on 1998–2000 WR400F models. This kit provides the basic components needed to restore pump function without buying a new housing.

This Vertex water pump rebuild kit includes all gaskets, O-rings, a mechanical seal, oil seals, and bearings required to service the WR400F water pump. It’s a direct OEM-style replacement packaged to help you repair leaks, reduce shaft play, and restore reliable coolant circulation. Ideal for riders and mechanics who want a cost-effective way to get a serviceable pump back in operation while maintaining correct fit and clearances for the stock pump assembly.

Features

• Complete set of gaskets and O-rings for proper sealing
• Replacement mechanical seal to prevent coolant leakage
• Oil seals and bearings to address wear and shaft play
• Fitment: Yamaha WR400F model years 1998–2000
• Manufactured by Vertex as a direct-fit replacement at a fraction of OEM cost

If you have questions or need help confirming fitment, call us directly. We offer installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) for assistance or to schedule service. If you’re considering multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov