MOTO1988 Fuel Tank Petcock Valve for Honda TRX400EX/TRX400X 1999-2014 — Replacement Lever & O-ring

This MOTO1988 fuel petcock and lever assembly replaces the OEM valve on Honda TRX400EX and TRX400X ATVs from 1999 through 2014, restoring reliable fuel flow and shutoff control.

If your Sportrax 400 has a leaky, stiff, or non-functioning fuel valve, this replacement petcock kit offers a direct-fit option using the referenced OEM part numbers 16950-HN1-003 and 16963-HN1-000. The package arrives with the petcock body, a matching lever, and a spare O-ring so you can swap the part without hunting for small components. It’s designed to match the mounting and fuel line connections used on the listed model years, making installation straightforward for most DIYers and mechanics.

How do I know this petcock fits my Honda TRX400EX or TRX400X?

Check your year and model against the compatibility list and compare OEM part numbers stamped on your old valve. This MOTO1988 assembly is intended for Sportrax/TRX400EX models from 1999–2008 and TRX400X 2009, 2012–2014; the product documentation lists the matching Honda part numbers.

• Compatible model years: TRX400EX 1999–2008, TRX400X 2009, 2012–2014
• Cross-references: OEM 16950-HN1-003 and 16963-HN1-000
• Compare shape, mounting holes, and fuel outlet size before purchase

What comes in the package and what tools are needed for installation?

The kit contains a single petcock valve, a replacement lever and one O-ring—everything required to swap the valve on most TRX400 tanks. Typical installation requires basic hand tools and about 15–30 minutes for someone comfortable with ATV maintenance.

• Included: petcock x1, petcock lever x1, O-ring x1
• Common tools: flathead screwdriver, pliers, small wrench set
• Steps: drain or secure fuel, remove old valve, install new O-ring, fasten new petcock, reconnect fuel line

How durable and reliable is the replacement compared to OEM?

The MOTO1988 valve is manufactured to mirror OEM dimensions and materials for a fit-for-purpose repair; longevity depends on fuel quality and riding conditions. Proper installation and occasional maintenance—like replacing a worn O-ring—help maintain leak-free operation.

• Designed to meet OEM fit standards for direct replacement
• Includes spare O-ring to prevent immediate seal failures
• Performance depends on proper mounting and fuel cleanliness

What should I check after installing the petcock?

After fitting the new valve, inspect for leaks and confirm the lever moves freely through ON, OFF, and RES positions. Run the engine briefly to verify steady fuel flow and recheck fasteners and hose clamps when cold and after the first ride.

• Look for fuel seepage around the valve body and hose ends
• Confirm lever positions are distinct and leak-free
• Tighten connections and recheck after initial run

Who is this for: Riders, DIY mechanics, and repair shops that own or service Honda Sportrax/TRX400EX and TRX400X models who need an OEM-compatible replacement fuel valve. This kit suits anyone replacing a failing petcock, restoring fuel control for trail riding, maintenance, or preparation for seasonal storage. If you’re unsure about fitment, compare the OEM numbers and photos provided or contact the seller for clarification before ordering.