Fork Seal Fitment Chart

Fork Seal Fitment Chart

Use this dirt bike fork seal reference chart to help identify common fork tube sizes by make, model, year range, fork brand, and fork type. Fork seal sizing is commonly based on the lower chrome fork tube diameter, such as 35mm, 43mm, 48mm, or 49mm.

Fitment note: This chart is for reference only. Always verify your exact year, model, sub-model, fork type, and OEM service manual before ordering fork seals, dust seals, bushings, or fork service parts. Mid-year production changes and previous owner fork swaps can affect fitment.

Step 1: Match Your Bike

Find your make, model, and exact year range before selecting seals.

Step 2: Check Fork Size

The listed size is the common fork tube diameter used for seal identification.

Step 3: Confirm Before Ordering

Use your service manual or OEM parts fiche for final confirmation.

TC: Twin Chamber / closed cartridge SFF: Separate Function Fork Air: Air spring fork USD: Upside-down / inverted fork
Common Dirt Bike Fork Seal Size Reference
Make Model Fork Brand Fork Size Year Range Fork Type / Notes
KTM 50 SX WP 35mm 2012–2026 WP XACT / USD
KTM 65 SX WP 35mm 2017–2026 WP XACT / USD
KTM 85 SX WP 43mm 2010–2026 WP XACT / USD
KTM 125 SX WP 48mm 2015–2026 WP XACT / USD
KTM 250 SX WP 48mm 2010–2026 WP XACT / USD
KTM 250 SX-F WP 48mm 2010–2026 WP XACT / USD
KTM 450 SX-F WP 48mm 2010–2026 WP XACT / USD
Honda CRF150R / CRF150R Expert Showa 37mm 2007–2026 USD cartridge fork
Honda CRF250R Showa 48mm 2010–2014 TC / coil spring
Honda CRF250R Showa 49mm 2015–2017 SFF-Air TAC
Honda CRF250R Showa 49mm 2018–2026 TC / coil spring
Honda CRF450R KYB 48mm 2009–2012 TC / closed cartridge
Honda CRF450R KYB 48mm 2013–2016 PSF air fork
Honda CRF450R Showa 49mm 2017–2026 TC / coil spring
Kawasaki KX85 KYB 36mm 2010–2025 USD cartridge fork
Kawasaki KX85 KYB 43mm 2026–Current Updated 43mm inverted fork
Kawasaki KX250F Showa 47mm 2010 TC / coil spring
Kawasaki KX250F Showa 47mm 2011–2012 SFF
Kawasaki KX250F Showa 48mm 2013–2019 SFF
Kawasaki KX250 / KX250F KYB 48mm 2020–2024 TC / coil spring
Kawasaki KX250 Showa 49mm 2025–2026 TC / coil spring
Kawasaki KX450F KYB 48mm 2010–2012 TC / coil spring
Kawasaki KX450F KYB 48mm 2013–2014 PSF air fork
Kawasaki KX450F Showa 49mm 2015–2018 SFF-Air TAC
Kawasaki KX450 Showa 49mm 2019–2026 TC / coil spring
Suzuki RM85 Showa 37mm 2010–2026 USD cartridge fork
Suzuki RM125 Showa 47mm 2003–2008 TC / coil spring
Suzuki RM250 Showa 47mm 2004–2008 TC / coil spring
Suzuki RM-Z250 Showa 47mm 2010–2012 TC / coil spring
Suzuki RM-Z250 Showa 48mm 2013–2015 SFF
Suzuki RM-Z250 KYB 48mm 2016–2018 PSF2 air fork
Suzuki RM-Z250 KYB 48mm 2019–2026 TC / coil spring
Suzuki RM-Z450 Showa 47mm 2010–2012 TC / coil spring
Suzuki RM-Z450 Showa 48mm 2013–2014 SFF
Suzuki RM-Z450 Showa 49mm 2015–2017 SFF-Air TAC
Suzuki RM-Z450 Showa 49mm 2018–2026 TC / coil spring
Yamaha YZ65 KYB 36mm 2019–2026 USD cartridge fork
Yamaha YZ85 KYB 36mm 2010–2026 USD cartridge fork
Yamaha YZ125 KYB 48mm 2010–2026 SSS / TC / coil spring
Yamaha YZ250 KYB 48mm 2010–2026 SSS / TC / coil spring
Yamaha YZ250F KYB 48mm 2010–2026 SSS / TC / coil spring
Yamaha YZ450F KYB 48mm 2010–2026 SSS / TC / coil spring

Need fork seals or help confirming fitment?

Match your bike by year, model, and fork size, then verify before ordering. When in doubt, check your service manual or contact us with your exact bike information.

Shop Fork Seals

Reference updated for common motocross models through 2026 where current specifications were available. This guide is intended to help customers narrow down fork seal size, but it does not replace OEM fitment lookup.