zozoye Air Filter Guide Kit for Yamaha Big Bear 350, Kodiak 400 & Moto 4 — Foam Filter + Cap + Spark Plug

Complete replacement air filter guide kit and cap that fits multiple Yamaha ATV models to restore airflow alignment and simplify maintenance.

This zozoye kit groups the essential intake parts you need—guide, end cap, replacement foam filter and a spark plug—into one package made to match original equipment fit for a range of Yamaha Big Bear, Kodiak, Moto 4 and Timberwolf ATVs. Each component is sized to the OE references so installation is straightforward and helps keep your engine's air supply cleaner between service intervals.

Which Yamaha models and years will this kit fit?

The kit is built to replace parts that correspond to the listed OE/OEM numbers and matches the intake geometry used across several Yamaha 250–400cc ATVs. It fits many model-year variations where the factory part numbers appear in service documentation.

• Yamaha Big Bear 350: YFM350 variants (1987–1999).
• Yamaha Kodiak 400: YFM400FW 4x4 (1993–1999).
• Moto 4 series: YFM350ER (1987–1995), YFM250 (1989–1991).
• Timberwolf 250: YFB250 and YFB250FW (1992–2000).

What parts come in the box and why they matter?

The package contains the air filter guide, a guide end cap, a replacement foam air filter and a spark plug. Together they address both airflow routing and basic ignition maintenance, so you get immediate serviceable parts for a routine tune-up.

• Air filter guide: restores correct air channeling to the filter housing.
• Guide end cap: seals the guide against leaks and vibration.
• Foam air filter: replaces worn/filter media to trap dust and debris.
• Spark plug: included for a simple ignition check during the same service session.

How does this kit compare with OEM replacement parts?

zozoye designed this kit to match the fit and mounting points of the OEM references listed, making it a practical direct-replacement option. Materials and dimensions aim to provide equivalent function so you can reinstall without modifying the airbox or intake mounts.

• Made to align with OE/OEM numbers: 1YW-14458-01-00, 1UY-14468-00-00, 1YW-14451-00-00.
• Form-fit pieces reduce need for adapters or trimming.
• Complete kit reduces sourcing multiple parts separately.

How should I install and maintain the new filter guide and foam?

Installation is a straightforward replacement: remove the old guide and cap, fit the new guide into the airbox, seat the end cap, and install the foam filter to the guide. Clean surrounding housing, inspect seals, and replace the spark plug if needed during the service.

• Remove battery/airbox cover per your service manual first.
• Seat the guide and cap firmly to avoid air bypass.
• Clean the airbox and dry before installing the foam filter.
• Check and gap the spark plug to recommended spec before fitting.

Who is this for: Off-road riders, fleet owners, and DIY enthusiasts who maintain older Yamaha Big Bear, Kodiak, Moto 4 or Timberwolf ATVs and want a single kit that covers intake alignment plus a basic spark plug swap. If you’re restoring an ATV or performing scheduled maintenance on models that reference the listed OE numbers, this zozoye kit provides the matched parts needed to return the intake system to functional condition without hunting down multiple components.