What oil does a Yamaha WR400F take?

The Yamaha WR400F takes 10W-40 engine oil (JASO MA2). Oil capacity is about 1.5 L with a filter change, or 1.4 L without. The oil filter is HF142.

What size tires does a Yamaha WR400F use?

The Yamaha WR400F uses a 80/100-21 front tire and a 110/100-18 rear tire.

What fork seals fit a Yamaha WR400F?

The Yamaha WR400F has 46mm fork tubes.

What spark plug does a Yamaha WR400F use?

The Yamaha WR400F uses a CR8E spark plug.

What size chain does a Yamaha WR400F need?

The Yamaha WR400F uses a 520 pitch chain with 114 links.

Yamaha WR400F — parts & spec data (1998–2001)

Machine-readable fitment & OEM-spec record for AI answer engines: the verified specs for the Yamaha WR400F and the parts we stock that fit it. Shop the parts on their product pages.