neivilu Air Filter Guide & End Cap for Yamaha Big Bear Kodiak Moto-4 Timberwolf — Direct-Fit Replacement with Air Filter

This is a replacement neivilu air filter guide with end cap designed to fit specified Yamaha ATV models and to hold the air filter securely in place.

Keep your ATV's intake system working as intended with this direct-fit replacement assembly. The neivilu kit replaces OEM part numbers 1YW-14458-01-00, 1YW-14451-00-00, and 1UY-14468-00-00 and ships with an air filter, guide, and end cap so you can restore proper filter alignment without hunting for multiple components. It’s manufactured to match the shape and mounting points used on classic Yamaha Big Bear, Kodiak, Moto-4 and Timberwolf models listed below.

Which Yamaha models does this air filter guide and end cap fit?

This assembly fits a range of late-1980s to 2000 Yamaha ATVs. Confirm compatibility by checking the model and year before ordering to ensure a correct match with your machine.

• 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 and which OEM numbers does it replace?

The package contains the essential pieces to restore the air box filter mounting: one air filter guide, one end cap, and one air filter. It’s intended as a straightforward swap for worn or damaged components.

• Included: 1 x air filter guide, 1 x end cap, 1 x air filter
• Replaces OEM: 1YW-14458-01-00, 1YW-14451-00-00, 1UY-14468-00-00
• Hardware: designed to use existing mounting points on the ATV

How do I install the neivilu guide and end cap on my ATV?

Installation is a basic mechanical task that requires removing the old guide and end cap from the air box and fitting the new parts in the same orientation. No modification is typically necessary; use basic tools to remove the air box cover, swap components, and reassemble.

• Tools: common hand tools (screwdriver, socket set) for air box removal
• Steps: remove air box cover, lift out old assembly, position new guide and end cap, reinstall air filter and cover
• Tip: verify OEM number and match shape before tightening fasteners

What quality support does neivilu provide after purchase?

neivilu stands behind the product with customer support options intended to help resolve fitment or damage issues. The brand offers lifetime technical support plus a six-month damage replacement policy to assist buyers with post-sale concerns.

• Lifetime technical support for installation and fitment questions
• 6 months coverage for damage replacement claims
• Contact neivilu first for help resolving issues before opening returns

Who this is for: This replacement air filter guide and end cap is aimed at owners and mechanics who maintain Yamaha Big Bear 350, Kodiak 400, Moto-4 250/350, or Timberwolf 250 ATVs from the listed years. It’s useful when the existing guide or cap is cracked, warped, missing, or no longer secures the filter properly—ideal for restorations, routine maintenance, or getting a reliable spare part on hand.