What fork seal fits a Honda CRF 450 R?

The Honda CRF 450 R uses a front fork that changed across model years: 47 mm (2002–2004), 47 mm (2005–2008), 48 mm (2009–2012), 48 mm (2013–2016), 49 mm (2017–2020), 49 mm (2021–2024), 49 mm (2025–2026). 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 Honda CRF 450 R fork?

The Honda CRF 450 R has a front fork that changed across model years: 47 mm (2002–2004), 47 mm (2005–2008), 48 mm (2009–2012), 48 mm (2013–2016), 49 mm (2017–2020), 49 mm (2021–2024), 49 mm (2025–2026).

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 Honda CRF 450 R.

Honda CRF 450 R Fork Seals

Fork specs for the Honda CRF 450 R 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.

Years	Fork tube	Fork
2002–2004	47 mm	showa
2005–2008	47 mm	showa
2009–2012	48 mm	showa
2013–2016	48 mm	showa
2017–2020	49 mm	showa
2021–2024	49 mm	showa
2025–2026	49 mm	showa

Kit	Years	Seal size	Replaces OEM
55-129	2017–2025	49x60x11	Harley-Davidson 91700025A, Honda 51490-KRN-A91
55-132	2009–2012	48x58x8.5	Honda 51490-MEN-A31, Honda 51490-MEN-003, Kawasaki 92049-0074, Yamaha 1C3-23145-L0-00
57-104	2017–2025	n/a	n/a
57-105	2009–2016	n/a	n/a
56-167	2013–2016	n/a	n/a
55-149	2013–2016	n/a	n/a
56-144	2017–2025	n/a	n/a
56-147	2009–2012	n/a	n/a