Öhlins Piston holder 2.5/M8x0.75/54.5
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number01654-15
CategoryPiston Holders
Dimension A0.75 mm
Dimension B54.5 mm
ThreadM8x0.75
Country of OriginSweden
DescriptionThe whole story▼

Piston holder 2.5/M8x0.75/54.5, Öhlins part number 01654-15. Öhlins machines its pistons rather than sintering them, which is why the port edges stay sharp.

Key Features

  • Dimension A 0.75 mm
  • Thread M8x0.75
  • Original Öhlins service part
  • Öhlins part number 01654-15
  • Dimension B 54.5 mm

What It Is

Dimensionally this is 0.75 mm, 54.5 mm, which is how it is told apart from the rest of the range. The piston carries the shim stacks and meters the oil; its port layout is what makes an Öhlins damper behave the way it does. Replacing a piston is a workshop job because the shim stack has to be rebuilt in the correct order. Valves and needles set the adjustable part of the damping; the piston sets the rest.

Genuine Service Part

A damper that can be rebuilt is a damper that stays on the bike; that is the whole argument for original service parts. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. Order by part number. The dimensions below are the ones Öhlins publishes for it. Service parts are ordered per piece unless stated otherwise.

How to Be Sure It Fits

The reliable route is the exploded drawing: find the position, read the number, order it — 01654-15 in this case. Öhlins states dimension a 0.75 mm, dimension b 54.5 mm for this number, and those figures are the deciding ones. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. Öhlins machines the ports rather than casting them, so the edges stay sharp and the flow predictable.

Fitting and Setup Service

We are an authorised Öhlins service centre, so you do not have to source the tools and the nitrogen: send us the damper and we rebuild it with the correct parts and the correct setting.

Specifications

  • Brand: Öhlins
  • Part Number: 01654-15
  • Category: Piston Holders
  • Dimension A: 0.75 mm
  • Dimension B: 54.5 mm
  • Thread: M8x0.75
  • Country of Origin: Sweden
07 · Support

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