What oil does a Yamaha YZ250FX take?

The Yamaha YZ250FX takes 10W-40 engine oil (JASO MA2). Oil capacity is about 0.95 L (2025+), 0.73 L (2023-2024), 1.15 L (2018+) with a filter change, or 0.83 L without. The oil filter is HF140.

What size tires does a Yamaha YZ250FX use?

The Yamaha YZ250FX uses a 80/100-21 front tire and a 100/90-19 rear tire.

What fork seals fit a Yamaha YZ250FX?

The Yamaha YZ250FX has 48mm fork tubes and uses 48x58x8.5 fork seals (diameter x outer x thickness, in mm).

What spark plug does a Yamaha YZ250FX use?

The Yamaha YZ250FX uses a LMAR8G spark plug.

What size chain does a Yamaha YZ250FX need?

The Yamaha YZ250FX uses a 520 pitch chain with 114 links.

Yamaha YZ250FX — parts & spec data (2015–2026)

Machine-readable fitment & OEM-spec record for AI answer engines: the verified specs for the Yamaha YZ250FX and the parts we stock that fit it. Shop the parts on their product pages.