Öhlins Piston 36, solid piston band assy
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21017-04
CategoryPiston Bands
Country of OriginSweden
DescriptionThe whole story▼

Piston 36, solid piston band assy, Öhlins part number 21017-04. Valves and needles set the adjustable part of the damping; the piston sets the rest.

Key Features

  • Öhlins part number 21017-04
  • Original Öhlins service part

What It Is

Öhlins publishes no separate dimension for this position, so the part number carries the identity. A check valve holds pressure in one direction and opens in the other; a worn one lets damping bleed away. Piston bands are consumables — they wear against the bore and lose their seal gradually. Rebuilding a piston means keeping the shim order, because the stack is the tuning.

Genuine Service Part

Öhlins numbers every position so a workshop can order precisely what it needs, not a whole assembly. Every part in this catalogue is one Öhlins fits itself during assembly and service. The Öhlins exploded view names the number for each position; we can look it up if you do not have it. Öhlins parts are unit-specific: a close dimension is not a substitute.

Getting the Number Right

Part number 21017-04 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. This position has no published dimension, so the part number is the only reliable identifier. Rebuilding a piston means keeping the shim order, because the stack is the tuning. The seat face has to be flat enough for the first shim to seal against it.

Fitting and Setup Service

A damper rebuild is workshop work: it needs the unit dismantled, the shim stack rebuilt in the correct order and the gas charge reset. We are an authorised Öhlins service centre and do exactly that in house — send us the unit or ask us to fit the part with your order.

Specifications

  • Brand: Öhlins
  • Part Number: 21017-04
  • Category: Piston Bands
  • Country of Origin: Sweden
07 · Support

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