YAMAHA
RD 250 European 1973 - 1979,
RD 400 European 1978 - 1979,

HIFLO HFA4201 AIR FILTER OEM STYLE.

Cross reference numbers ONLY.
1A2-14451-00

Part No. 15-7761.HF (oro2u.com)

Each filter is manufactured to perfectly fit the factory air box.
Featuring top-quality materials from around the world including the Powerflow filtering media.
Developed to meet the demands of high-performance engines.
Direct replacements for your original equipment filter; no need to change carburetor jets or settings.