What fork seal fits a Yamaha YZ450F?

The Yamaha YZ450F uses a front fork that changed across model years: mm (2003–2005), 48 mm (2006–2009), 48 mm (2010–2013), 48 mm (2014–2017), 48 mm (2018–2022), 48 mm (2023–2026). We stock the manufacturer-verified seal and bushing kits for it; matching is done off the verified application list, not just the seal size.

What size is the Yamaha YZ450F fork?

The Yamaha YZ450F has a front fork that changed across model years: mm (2003–2005), 48 mm (2006–2009), 48 mm (2010–2013), 48 mm (2014–2017), 48 mm (2018–2022), 48 mm (2023–2026).

Can I use any seal with the same dimensions?

No. Fork seals can share a size and still not seat correctly in a different fork design, so use the seal verified for your bike. The kits listed here are confirmed by the manufacturer to fit the Yamaha YZ450F.

Yamaha YZ450F Fork Seals

Fork specs for the Yamaha YZ450F vary by year (see the table below).Every kit here is verified by the manufacturer to fit this exact bike. Fork seals can share a size and still not seat in a different fork, so we only list what is confirmed for your bike.

Fork typeUpside-down

Years	Fork tube	Fork
2003–2005	mm	Kayaba
2006–2009	48 mm	Kayaba
2010–2013	48 mm	Kayaba
2014–2017	48 mm	Kayaba
2018–2022	48 mm	Kayaba
2023–2026	48 mm	Kayaba

Kit	Years	Seal size	Replaces OEM
55-126	2003	46x58x9.5	n/a
55-132	2004–2025	48x58x8.5	Honda 51490-MEN-A31, Honda 51490-MEN-003, Kawasaki 92049-0074, Yamaha 1C3-23145-L0-00
57-103	2003	n/a	n/a
57-105	2004–2025	n/a	n/a
56-141	2003	n/a	n/a
56-147	2004–2025	n/a	n/a
38-6010 (bushings)	2003	n/a	n/a
38-6050 (bushings)	2004	n/a	n/a