What fork seal fits a KTM 300 EXC Hardenduro?

The KTM 300 EXC Hardenduro uses a 48 mm fork. 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 EXC Hardenduro fork?

The KTM 300 EXC Hardenduro has a 48 mm fork.

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 EXC Hardenduro.

KTM 300 EXC Hardenduro Fork Seals

Q: What fork oil does the KTM 300 EXC Hardenduro use?

The KTM 300 EXC Hardenduro uses 4wt fork oil, about 625 ml per leg (factory fill WP/KTM Fork Oil SAE 4 (48601166S1)).

The KTM 300 EXC Hardenduro runs a 48 mm front fork.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 tube48 mm

Kit	Years	Seal size	Replaces OEM
55-159	2024–2026	n/a	n/a
56-192	2024–2026	n/a	n/a
38-6157 (bushings)	2024–2026	n/a	n/a

Verified fork kits we stock for your KTM 300 EXC Hardenduro

We're restocking fork kits for the KTM 300 EXC Hardenduro. Browse all suspension.

Fork oil for your KTM 300 EXC Hardenduro

A fork-oil change on the KTM 300 EXC Hardenduro uses 4wt fork oil, about 625 ml per leg. 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.