Accossato radial brake master cylinder CY061⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
Part numberCY061-L-18-RST
TypeRadial brake master cylinder
Piston diameter14 mm
Pivot distance18 mm
LeverFolding, long, with relieving eyelet (RST)
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 14x18 is a radial brake master cylinder sized for smaller-displacement motorcycles and scooters that still deserve a precise, controllable front brake. CNC machined from aluminium in Italy, it pairs a compact 14 mm piston with a fixed 18 mm lever pivot distance, giving prompt, predictable braking without the heavier lever action a larger piston would demand. The long folding lever, fitted with a relieving eyelet, keeps the control neat on narrower handlebars.

Key Features

  • 14 mm piston diameter, a size suggested for scooters and smaller motorcycles
  • 18 mm lever pivot distance for track use, also recommended for street riding
  • Folding lever, long version, fitted with a relieving eyelet (RST)
  • CNC-machined aluminium body with natural anodising
  • Offset riser that limits master cylinder flex under hard braking
  • Passive lever stroke reduced by more than 50 percent versus a standard radial master cylinder
  • Stainless steel mounting screws and a zinc-plated bleed valve
  • Seals manufactured from Formula 1 compound material

Construction and Material Quality

This master cylinder is fully made in Italy from CNC-machined aluminium finished with natural anodising. The mounting screws are stainless steel, the bleed valve is zinc-plated steel, and the internal seals are formed from Formula 1 compound so they keep sealing reliably across repeated heat cycles and fluid contact. An off-set riser is built into the mounting clamp to reduce the bending of the unit while the brake is applied hard, and every internal passage is shaped to keep the passive travel of the lever as short as practical, so the gap between pulling the lever and the pads actually biting is noticeably shorter than with a conventional master cylinder of this size.

Piston Diameter and Lever Pivot Explained

The 14x18 designation tells a rider exactly what to expect from this unit. The 14 mm piston diameter is the smallest in the Accossato radial brake range and is the figure the manufacturer suggests for scooters and lighter-weight motorcycles, where a smaller piston keeps lever effort low while still moving enough fluid for a single-disc front brake. The fixed 18 mm pivot distance is described as suited to track use and is also recommended for everyday street riding, giving a lever feel that favours a more direct, positive bite over an especially light touch. Unlike the PRS versions in the range, this pivot distance is not rider-adjustable, which keeps the unit simpler and lighter for applications where one consistent setting is all that is needed.

Fitment and Compatibility

No specific vehicle list is published for this master cylinder, and no vehicles are listed against it in our fitment data; it is intended as a universal 14 mm radial brake master cylinder for a 22 mm handlebar clamp diameter. Before ordering, check that your handlebar is 22 mm in diameter, that your brake system is designed to work with a 14 mm master cylinder, and that the piston diameter matches the calliper and disc setup already fitted to your motorcycle.

Road Approval

This 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 14x18 radial brake master cylinder fitted with a long folding lever and relieving eyelet (RST), finished in natural anodised aluminium. Stainless steel mounting screws, the zinc-plated bleed valve and the Formula 1 compound seals are assembled on the unit. The stop light switch, available separately as ID001 or ID002, and the fluid reservoir are not included and must be purchased separately.

Specifications

  • Part number: CY061-L-18-RST
  • Type: Radial brake master cylinder
  • Piston diameter: 14 mm
  • Pivot distance: 18 mm
  • Lever: Folding, long, with relieving eyelet (RST)
  • 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
DownloadsData sheet▼
FitmentWhich bikes this fits▼
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