What fork seal fits a KTM 300 MXC?

The KTM 300 MXC uses a front fork that changed across model years: 45 mm (1995–1996), 50 mm (1997), 50 mm (1998–1999), 43 mm (2000–2002), 48 mm (2003–2005). 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 KTM 300 MXC fork?

The KTM 300 MXC has a front fork that changed across model years: 45 mm (1995–1996), 50 mm (1997), 50 mm (1998–1999), 43 mm (2000–2002), 48 mm (2003–2005).

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 KTM 300 MXC.

KTM 300 MXC Fork Seals

Q: What fork oil does the KTM 300 MXC use?

The KTM 300 MXC uses 4wt fork oil (factory fill WP/KTM Fork Oil SAE 4 (48601166S1)).

Fork specs for the KTM 300 MXC 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
1995–1996	45 mm	wp
1997	50 mm	wp
1998–1999	50 mm	wp
2000–2002	43 mm	wp
2003–2005	48 mm	wp

Kit	Years	Seal size	Replaces OEM
55-114	2000–2001	43x53x9.5	KTM 43570623, KTM R14049
55-130	1997	50x63x11	n/a
55-131	2003–2005	48x58x9.5	Yamaha 1C3-23145-L0-00
55-134	1998–1999	50x60x10.5	n/a
55-135	1995–1996	45x58x11	n/a
57-105	2003–2005	n/a	n/a
57-106	1998–1999	n/a	n/a
57-137	2000–2001	n/a	n/a

Verified fork kits we stock for your KTM 300 MXC

Fork Seal Kit

Fork Oil Seal Kit — Aprilia EVT Caponord

$19.12

Fork Seal Kit

Fork Oil Seal Kit — Gas-Gas EC250 (2012) + 174

$19.12

Fork Seal Kit

Fork Oil Seal Kit — KTM Adventure 640

$19.12

Fork Seal Kit

Fork Oil Seal Kit — Beta RR 4T 250 (2005-2007) +

$19.12

Fork Seal Kit

Fork Dust Seal Kit — Beta RR 2T 125 (2019-2023)

$19.50

Fork Seal Kit

Fork Dust Seal Kit — BMW F800GS (2013-2017) +

$21.01

Fork oil for your KTM 300 MXC

A fork-oil change on the KTM 300 MXC uses 4wt fork oil. Factory fill: WP/KTM Fork Oil SAE 4 (48601166S1). We don't stock 4wt yet, so the closest weight we carry (5wt) is shown below.