neivilu Air Filter Guide End Cap Kit for Yamaha Big Bear, Kodiak, Moto-4 & Timberwolf (1987-2000) with Filter

neivilu Air Filter Guide End Cap is a replacement assembly that secures and seals the air filter for select Yamaha ATVs from 1987–2000, restoring proper fit and protection for the intake system.

If your Yamaha ATV’s original air filter housing or end cap is cracked, loose, or missing, this neivilu replacement provides a direct-fit solution. Engineered to match the OEM mounting points and supplied as a kit with the filter and guide, it helps maintain correct airflow routing and keeps dirt and debris away from sensitive engine components. Check the compatibility list and OEM numbers to confirm fitment before ordering.

Which Yamaha models does this part work with?

This assembly fits a range of older Yamaha ATVs, including Big Bear, Kodiak, Moto-4, and Timberwolf models built between 1987 and 2000. Verify the model year and part number against your machine to ensure compatibility.

• Yamaha Big Bear 350 (YFM350) 1987–1999
• Yamaha Kodiak 400 (YFM400) 1993–1999
• Yamaha Moto-4 250 (YFM250) 1989–1991
• Yamaha Moto-4 350 (YFM350) 1987–1995
• Yamaha Timberwolf 250 (YFB250) 1992–2000

What parts are included in the package?

The neivilu kit arrives as a practical replacement set so you can complete the repair in one visit. It combines the guide, end cap, and a matching air filter so the assembly installs cleanly and functions immediately.

• 1x air filter guide piece shaped to original mounting geometry
• 1x end cap that seals the filter housing
• 1x compatible air filter element already matched to the kit

How does this replace OEM part numbers and ensure fit?

neivilu designed this part to correspond with common OEM references so installation is straightforward and alignment matches factory locations. It is intended as a direct replacement for specific Yamaha part numbers listed by OEMs.

• Replaces part numbers: 1YW-14458-01-00, 1YW-14451-00-00, 1UY-14468-00-00
• Direct-fit mounting points reduce modification or trimming
• Comes with an air filter selected to match the housing dimensions

What warranty or support comes with the purchase?

neivilu backs this product with customer support and limited replacement coverage to help if the part arrives damaged or doesn’t fit as expected. Contact the seller first to resolve issues quickly and receive guidance on fitment or returns.

• 6 months replacement for damage during shipping or manufacturing defects
• lifetime technical support for installation and fit questions
• customer service contact provided for fast troubleshooting

Who is this for: This neivilu Air Filter Guide End Cap kit is designed for owners, mechanics, and restoration enthusiasts who need an affordable, ready-to-install replacement for worn or broken airbox components on older Yamaha ATVs. It’s ideal if you want to return an ATV to reliable operation without sourcing multiple separate parts—confirm the OEM numbers and model years before purchase to ensure correct fitment.