OXCANO Carburetor Accelerator Pump Diaphragm Rebuild Kit — OE 16021-MEB-771 Fit for Honda/Yamaha, Fuel‑Resistant

OXCANO's Carburetor Accelerator Pump Diaphragm Rebuild Kit is a complete replacement kit built to restore accelerator pump function and match the original equipment fit for many Honda, Yamaha, Suzuki, Kawasaki and KTM carburetors.

This rebuild kit contains the plastic, metal and rubber components needed to service the accelerator pump assembly on a wide range of off-road and motocross machines. Manufactured to mirror OE form, fit and function (OE number 16021-MEB-771), the kit is designed for durability in an engine environment and to bring back smooth throttle response after diaphragm wear, cracking or hardening. Included pieces are molded and stamped to resist fuel, heat and vibration while delivering consistent performance across compatible models.

Which motorcycles and ATVs will this kit fit?

The OXCANO kit is made for a long list of off-road bikes and ATVs from major manufacturers. Check your vehicle year and model against the compatibility list before purchasing to ensure a direct swap with OE 16021-MEB-771. This kit covers many CRF, YZ, WR, KX, RMZ, DRZ, TRX, KX and KTM models spanning late 1990s to mid-2010s production.

• Honda CRF250R/CRF250X (2004–2009, 2012–2017), CRF450R/CRF450X ranges and TRX450 models.
• Yamaha YZ250F, YZ450F, WR250F/WR450F and related YFZ/WR/WR series years listed.
• Suzuki DRZ400 and RMZ series; Kawasaki KX250F, KX450F and KLX450R; KTM 400–530 off-road models listed.
• Replace part number 16021-MEB-771 for supported applications.

What parts are included and what materials are used?

The kit contains a selection of replacement parts made from plastic, metal and rubber optimized for fuel-system exposure and mechanical wear. Components are produced to match the original geometry so installation and operation replicate OEM performance.

• Molded rubber diaphragm(s) resistant to fuels and detergents.
• Stamped metal pump parts and plastic housings for correct alignment and durability.
• Seals and small hardware sized to restore pump assembly tolerances and leak-free operation.

How does installing this rebuild kit affect throttle response?

A worn accelerator pump diaphragm or degraded internal parts can cause delayed or uneven throttle response. Rebuilding the pump with fresh parts restores proper fuel squirt during rapid throttle openings and helps maintain consistent idle-to-WOT transitions.

• Restores immediate fuel delivery on throttle blips and quick openings.
• Reduces stumbling, hesitation or lean surges caused by torn diaphragms.
• Helps maintain predictable jetting characteristics after service.

Is this kit easy to install, and what should I prepare?

Installation is straightforward for anyone familiar with carburetor service. Basic hand tools, a clean work area and attention to small part orientation are all that’s required. Keep the carburetor manual nearby for torque and assembly references.

• Requires carburetor removal or partial disassembly depending on vehicle layout.
• Use clean rags, carb cleaner (if needed) and a small tray to organize screws and springs.
• Follow OEM procedure for diaphragm seating and check for leaks on reassembly.

Who is this for: The OXCANO Carburetor Accelerator Pump Diaphragm Rebuild Kit is intended for motorcycle and ATV owners, mechanics and restoration specialists who need an OE-form replacement for accelerator pump internals. It suits riders maintaining older off-road machines, performance tuners addressing throttle response, and service shops performing routine carburetor rebuilds on compatible Honda, Yamaha, Suzuki, Kawasaki and KTM models.