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Fork Service Basics

Suspension is a wear item. Here's what regular service does, how to know yours is due, and what "tired" really feels like.

Why suspension needs service

Fork and shock oil breaks down, seals wear, and bushings get sloppy — gradually, so you adapt to it without noticing. Fresh service restores consistent, predictable damping. Skipping it costs you traction, comfort, and eventually expensive parts.

Signs yours is due

  • Oil weeping past the fork or shock seals (a greasy ring on the tube)
  • Harsh, notchy, or "dead" feel that wasn't there when it was fresh
  • Damping that fades as a moto/ride goes on (gets mushy when hot)
  • Clunks, top-out noise, or a gritty feel through the stroke
  • It just doesn't hold a setting like it used to

Rough service intervals

Hours, not calendar — and it depends on conditions (sand, mud, and heat are hard on oil):

Rider Fork/shock oil & seals Full rebuild / inspection
Racer / hard use Every 15–25 hrs Each season or ~50 hrs
Trail / weekend Every 30–40 hrs Every 1–2 seasons
💡 A quick fork oil-and-seal service is cheap insurance. Waiting until it's leaking usually means a scored tube or worn bushing — a much bigger bill.

What a service includes

  • Full disassembly, clean, and inspection of tubes, bushings, and seals
  • New seals and wipers; fresh, correct-grade oil
  • Correct oil height / volume set (this affects how progressive the fork feels — too much oil = harsh near bottom, too little = easy bottoming)
  • Reassembly to spec, bled of air, and function-checked

Service vs. revalve — what's the difference?

A service restores your suspension to how it was designed to feel. A revalve changes how it's designed to feel — new shim stacks tuned to your weight, speed, and terrain. If your bike is fresh but still doesn't do what you want, you need a revalve, not another service.

Not sure which you need? That's a two-minute conversation — tell us how it feels and what you ride, and we'll point you the right way.

Want it done right — or done for you? Bring it to TBT and we'll dial it in.

Book a Service More Guides

General guidance from TBT Racing. Every bike, spring rate, and rider is different — when in doubt, or for a fully dialed setup, have TBT do it. Work on suspension at your own risk; components are under pressure.