Accossato radial clutch master cylinder CL083 with black lever⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
Part numberCL083
TypeRadial clutch master cylinder
Piston diameter17 mm
Lever ratio15-16-17 mm (adjustable)
LeverFolding, long, with relieving eyelet (RST), 7 colours
BodyCNC-machined aluminium, natural anodised
Hose threadM10x1
Brake light switchNot included (ID001 or ID002 separately)
ReservoirNot included
Road approvalNo German approval documented
DescriptionThe whole story▼

The Accossato PRS 17x15-16-17 is the largest piston option in this adjustable radial clutch line, built for motorcycles where a bigger piston is wanted to move more fluid per stroke, paired with a lever pivot that can be set to 15, 16 or 17 mm. It suits riders who prefer a firmer, more direct clutch action and still want the freedom to adjust the pivot rather than accept one fixed setting. The long folding lever has a relieving eyelet and is available in seven colours, with the adjusting knob matched to the lever colour.

Key Features

  • 17 mm piston diameter, the largest in the PRS clutch range
  • Adjustable lever pivot distance: 15, 16 or 17 mm, suitable for all uses
  • Long folding lever with relieving eyelet (RST), available in seven colours
  • Adjusting knob finished in the same colour as the lever
  • CNC-machined aluminium body with natural anodising
  • Offset riser that reduces master cylinder deflection during gear changes
  • Stainless steel mounting screws and a zinc-plated bleed valve
  • Seals manufactured from Formula 1 compound material

Construction and Material Quality

This clutch master cylinder is machined from solid aluminium billet in Italy, with a natural anodised finish rather than paint. Stainless steel screws hold the unit to its clamp, the bleed valve is zinc-plated steel, and the seals are produced from Formula 1 compound so they continue sealing properly after repeated contact with hydraulic fluid and the heat that builds up around the engine and gearbox. An offset riser within the clamp reduces bending of the body when the lever is worked hard, and the fluid passages are shaped to minimise the passive stroke, the small amount of lever movement before the clutch plates actually begin to separate.

Why a 17 mm Piston Suits Firmer Clutch Feel

Being the largest piston offered in this PRS clutch line, the 17 mm size displaces more fluid for each millimetre the lever travels, which shortens the stroke needed to fully disengage the clutch but asks for more hand force to do it. That trade-off suits riders who find a smaller piston too soft at the lever, or who simply prefer a shorter, more positive action when changing gear under load. The three position pivot, adjustable between 15, 16 and 17 mm, still allows the hand effort to be eased off a little by selecting the shorter pivot setting, without having to move to a smaller piston altogether.

Fitment and Compatibility

Neither Accossato nor our own fitment data lists specific motorcycles for this clutch master cylinder; it is supplied as a universal 17 mm radial clutch pump for a 22 mm handlebar clamp. Before ordering, verify that your handlebar clamp is 22 mm and that your clutch hydraulics suit a 17 mm piston.

Road Approval

This clutch master cylinder is not supplied with German road-approval documentation; it is intended for track and competition use.

Scope of Delivery

The package includes the Accossato PRS 17x15-16-17 radial clutch master cylinder with the long folding lever and relieving eyelet (RST) and the matching adjusting knob, both in the colour selected, finished in natural anodised aluminium. Stainless steel mounting screws, the zinc-plated bleed valve and the Formula 1 compound seals are fitted to the unit. The brake light switch, available separately as ID001 or ID002, and the fluid reservoir are not included and must be purchased separately.

Specifications

  • Part number: CL083
  • Type: Radial clutch master cylinder
  • Piston diameter: 17 mm
  • Lever ratio: 15-16-17 mm (adjustable)
  • Lever: Folding, long, with relieving eyelet (RST), 7 colours
  • Body: CNC-machined aluminium, natural anodised
  • Hose thread: M10x1
  • Brake light switch: Not included (ID001 or ID002 separately)
  • Reservoir: Not included
  • Road approval: No German approval documented
FitmentWhich bikes this fits▼
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