Mikuni Carburetor Rebuild Kit for Super BN PWC Carburetor — Single‑Car, Gaskets & Diaphragms

The Mikuni Carburetor Rebuild Kit for Super BN carburetors supplies genuine replacement gaskets, diaphragms, seals and O-rings to restore one PWC carburetor to proper working order.

If your personal watercraft is running rough, leaking fuel, or suffering inconsistent throttle response, a full rebuild of the Super BN carburetor often brings reliability back without the cost of a new carb. This factory-quality Mikuni kit collects the wear items most likely to fail after years of use in marine conditions so you can perform a thorough service with confidence. Note that the needle valve/seat and jets are not included; verify part needs for your specific model before ordering.

What exactly is included and what is intentionally excluded?

This kit contains the consumable components required to rebuild one Mikuni Super BN carburetor: gaskets, diaphragms, seals, O-rings, and assorted mounting hardware. It is supplied as a single-carburetor service kit and built to Mikuni OEM standards.

• Includes: carb gaskets, diaphragms, rubber seals, O-rings, small hardware pieces
• Excludes: needle valve/seat assembly and jet sets — replace those separately if worn
• Sold per single carburetor; buy multiple kits for multi-carb engines
• Genuine Mikuni parts for fit and durability

Which PWC models will this rebuild kit fit?

The kit is compatible with a wide range of legacy Sea-Doo, Yamaha, Polaris and TigerShark personal watercraft that use the Mikuni Super BN carburetor. Compatibility covers numerous model years; always cross-check the kit against your carburetor model and year to avoid mismatch.

• Sea‑Doo models including SP, SPI, SPX, GTI, GTS, GTX, Challenger and others (1992–2005 ranges)
• Yamaha models including SuperJet, WaveRunner, WaveBlaster, WaveRaider and XL series (1990–2014 ranges)
• Polaris SL/SLT/SLX series and TIGERSHARK legacy models listed by year
• Not compatible with Sea‑Doo 951 models or Yamaha 800/1200 power‑valve carburetors

How does this kit help during routine maintenance or a rebuild?

Replacing all the rubber and gasket components eliminates leaks, restores diaphragm flexibility, and refreshes sealing surfaces that degrade over time. That helps stabilize fuel metering and throttle response when paired with a cleaned carb body and, if necessary, new jets or needle/seat parts.

• Stops vacuum and fuel leaks caused by hardened gaskets or brittle diaphragms
• Makes throttle response more consistent after reassembly and calibration
• Extends service life of the carburetor when combined with proper cleaning
• Simplifies rebuilds with all common consumables included in one kit

What should I check before buying and installing this kit?

Confirm your carburetor is a Mikuni Super BN and that your PWC model appears on the compatibility list. Inspect the needle/seat and jets — if they are corroded or worn, plan to source those separately since they are not part of this kit.

• Verify carburetor model and year against the kit compatibility list
• Inspect needle valve/seat and jets; replace if contaminated or damaged
• Use proper carb-cleaning practices and torque specs during reassembly
• Purchase additional kits for multi-carb engines to service all units equally

Who this kit is for: This genuine Mikuni rebuild kit is intended for PWC owners, mechanics and restoration specialists working on older Sea‑Doo, Yamaha, Polaris or TigerShark watercraft that use the Super BN carburetor. It's ideal for those who want OEM-fit consumables to eliminate leaks, restore diaphragm performance, and perform a confident single-carb rebuild without replacing the entire carburetor.