Fork Seals & Wipers
A weeping fork leg is one of the most common jobs on a dirt bike, dual-sport, or older street bike, and it is a job you can do yourself in an afternoon with the right seal kit and a little care. This page carries fork oil seals, dust seals (wipers), and combined kits from All Balls Racing, Pivot Works, ProX, and K&S, plus a few Emgo and Psychic sets.
Oil seal, dust seal, or both? The oil seal is the one that keeps fork oil in; the dust seal (wiper) sits above it and keeps grit out. If a leg is leaking, replace the oil seals — and since the dust seals are the reason most oil seals fail early, replace them at the same time. All Balls part numbers tell you what's in the box: 55-series kits are oil seals only, 57-series are dust seals only, and 56-series include both. Pivot Works "Fork Oil and Dust Seal" kits and ProX "Fork Seal and Wiper" sets are the same idea in one box — check the listing to confirm what each kit includes.
Getting the right size. Seals are sold by fork tube diameter and the seal's outer dimensions, and the same bike can use different forks across model years — filter by your make, model, and year, and if you are unsure, measure the inner fork tube with calipers and compare it to the first number in the seal size. While the fork is apart, check the slide bushings for worn-through coating and grab a fork bushing kit if needed; if the fork has never been serviced, a complete fork rebuild kit bundles the pieces for a full service in one order. Fork boots help the new seals last on bikes that see mud and gravel. Free shipping on orders $50+ (Lower 48).
Read our guide to finding the right fork seal size.
