NU-2235ST Uni-Filter Air Filter for Yamaha YZ400 YZ 400 1977-1978

Uni-Filter Air Filter for Yamaha YZ400

This Uni-Filter air filter, part number NU-2235ST, is a replacement filter element for the Yamaha YZ 400 produced between 1977 and 1978, designed to trap dust and debris before it reaches the engine.

Overview

The Uni-Filter Air Filter NU-2235ST is a serviceable replacement element for the Yamaha YZ400 motocross bike. This air filter protects the engine from dirt, sand, and grit drawn in through the intake, and its two-stage foam construction can be cleaned and re-oiled for repeated use. It suits riders maintaining a 1977-1978 Yamaha YZ 400 who want dependable filtration on and off the track.

Built For Performance

• Two-stage foam design for layered filtration
• Washable and reusable when cleaned and re-oiled
• Fits the stock air box of the specified YZ400 applications
• Flexible foam conforms to the cage for a secure seal
• Listed part number NU-2235ST for straightforward identification

Fits These Machines

• for Yamaha YZ400 1977
• for Yamaha YZ400 1978

On-The-Job Use

• Motocross track riding
• Trail and off-road riding
• Routine air filter servicing and replacement
• Rebuilding or restoring a 1977-1978 YZ400

Specs At A Glance

Good To Know

Q: How often should this air filter be cleaned? A: Clean and re-oil the foam element after every few rides or sooner in dusty conditions, and replace it if the foam tears or breaks down.

Q: Does this filter arrive pre-oiled? A: Foam filters are typically sold dry, so apply a suitable foam filter oil before installation for proper dust capture.

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