NU-2241ST Uni-Filter Air Filter for Yamaha IT425 1979-1980 IT 425

Air Filter for Yamaha IT425

This Uni-Filter air filter (NU-2241ST) fits 1979-1980 Yamaha IT 425 models, replacing the stock filter to keep intake air clean during off-road riding.

Overview

This Uni-Filter air filter is a replacement intake filter for the 1979-1980 Yamaha IT 425, built to capture dust and debris before they reach the carburetor. The NU-2241ST is a popular choice for riders maintaining vintage enduro machines that see regular dirt and trail use. Keeping a clean air filter on the IT425 protects the top end and supports consistent engine performance.

Built For Performance

• Dual-layer foam design captures fine dust while allowing steady airflow
• Direct replacement for the factory air filter element
• Washable and reusable with proper foam filter oil
• Resists breakdown from fuel and two-stroke oil mist
• Seals to the airbox to reduce unfiltered air bypass

Fits These Machines

• for Yamaha IT 425 (1979-1980)
• for Yamaha IT425

On-The-Job Use

• Enduro and trail riding in dusty conditions
• Routine airbox maintenance on vintage Yamaha dirt bikes
• Restoration projects bringing an IT425 back to rideable shape

Specs At A Glance

Good To Know

Q: How often should this air filter be cleaned? A: Clean and re-oil it after every few rides in dusty conditions, or more frequently when riding in sand or loose dirt. A dirty filter restricts airflow and can affect carburetion.

Q: Does this filter need oil before use? A: Yes, foam filters should be treated with proper foam filter oil so they can trap fine dust. Follow the oil manufacturer instructions for best results.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.