What fork seal fits a KTM 50 SX?

The KTM 50 SX uses a 35 mm conventional fork with 32x42x9 oil seals. 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 50 SX fork?

The KTM 50 SX has a 35 mm conventional fork with 32x42x9 oil seals.

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 50 SX.

KTM 50 SX Fork Seals

Q: What fork oil does the KTM 50 SX use?

The KTM 50 SX uses 4wt fork oil (factory fill WP/KTM Fork Oil SAE 4 (48601166S1)).

The KTM 50 SX runs a 35 mm conventional front fork, oil seal 32x42x9 (Marzocchi 32mm conventional (KTM 50 SX 2001-2012)).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 tube35 mm
Oil seal size32x42x9
Fork typeConventional
ForkMarzocchi 32mm conventional (KTM 50 SX 2001-2012)

Kit	Years	Seal size	Replaces OEM
55-115	2006–2011	32x42x9	n/a
57-142	2006–2011	n/a	n/a
55-141	2012–2016	n/a	n/a
57-146	2012–2026	n/a	n/a
56-159	2012–2016	n/a	n/a
56-197	2017–2026	n/a	n/a
55-163	2017–2026	n/a	n/a
56-154	2006–2011	n/a	n/a

Verified fork kits we stock for your KTM 50 SX

Fork Seal Kit

Fork Dust Seal Kit — Gas-Gas MC 50 (2021-2026) +

$22.20

Fork Seal Kit

Fork Oil & Dust Seal Kit — KTM JR ADV 50

$40.57

Fork oil for your KTM 50 SX

A fork-oil change on the KTM 50 SX 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.