The Uni Filter UP-4125ST motorcycle air filter is a dual-stage pod-style filter that attaches directly to the carburetor. It has black inner foam, red outer foam, and a urethane flange. The outer pre-filter is used dry in dusty conditions or oiled in extremely wet conditions.
- Type: Dual-stage pod-style filter
- Flange material: Urethane
- Installation: Directly onto the carburetor
- Compatibility: BMW R 80, Honda XR
- Country of manufacture: USA