Accossato radial brake master cylinder CY108 with black lever⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
Part numberCY108
TypeRadial brake master cylinder (Ready To Brake)
Piston diameter17 mm
Pivot distance20 mm
LeverFolding, long, with relieving eyelet (RST), 7 colours
BodyCNC-machined aluminium, shark design
Hose threadM10x1
Brake light switchIntegrated micro-switch, included
ReservoirNot included
Road approvalNo German approval documented
DescriptionThe whole story▼

This Ready To Brake master cylinder pairs the same 17 mm piston as the 17x18 version with the longest, promptest pivot distance Accossato offers on this bore, 20 mm, a setting the manufacturer does not recommend for street use because of the extra lever force it requires. It carries the shark-shaped body, integrated micro-switch and seven-colour folding lever common to the Ready To Brake range, and is sold as a universal fit rather than against a specific vehicle list.

Key Features

  • 17 mm piston diameter, for calipers with a mounting distance of 32 mm or less
  • 20 mm lever pivot distance, the promptest setting, not recommended for street use
  • Folding lever, long version, with relieving eyelet (RST), available in seven colours
  • Integrated micro-switch for the brake light, built into the unit
  • Offset fixing riser with a quick-release jumper to speed up servicing
  • Shark-shaped body that gives the master cylinder its distinct profile
  • Stainless steel mounting screws and a zinc-plated bleed valve
  • Seals manufactured from Formula 1 compound material

Construction and Material Quality

The body here is also a CNC-machined aluminium part produced in Italy, carrying the stainless steel screws, zinc-plated bleed valve and Formula 1 compound seals used throughout the Ready To Brake line, hardware picked to survive heat cycling and long-term brake fluid exposure. A quick-release jumper built into the offset fixing riser allows the pump to be unbolted from its clamp for servicing without cracking the hose joint, and the same offset limits how much the body can bend when the lever is pulled under hard braking.

Trading Street Comfort for the Shortest Stroke

A 20 mm pivot distance is the longest Accossato fits to the 17 mm Ready To Brake piston, and the extra distance between the pivot point and the pumping axis shortens the lever travel needed to reach full braking force, at the cost of requiring more hand force for the same result; that is why this setting is not recommended for street use, where the 18 mm version in this piston size is the better everyday choice. On a track day, where a rider is already braking hard and wants the shortest possible lever movement before the pads bite, this 20 mm pivot delivers exactly that, while the Ready To Brake body still keeps the brake light wired in through its integrated micro-switch.

Fitment and Compatibility

There is no vehicle-specific listing for this master cylinder, and our fitment records show no matched motorcycles; it goes out as a universal 17 mm radial unit for a handlebar with a 22 mm clamp. Confirm that clamp size on your own bars, check that your front brake is built around a 17 mm master cylinder, and keep the caliper mounting distance within 32 mm before ordering.

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 Ready To Brake 17x20 radial brake master cylinder with the integrated micro-switch, fitted with a long folding lever and relieving eyelet (RST) in the colour selected, plus the matching mounting nut. Stainless steel mounting screws, the zinc-plated bleed valve and the Formula 1 compound seals are assembled on the unit. The fluid reservoir is not included and must be purchased separately.

Specifications

  • Part number: CY108
  • Type: Radial brake master cylinder (Ready To Brake)
  • Piston diameter: 17 mm
  • Pivot distance: 20 mm
  • Lever: Folding, long, with relieving eyelet (RST), 7 colours
  • Body: CNC-machined aluminium, shark design
  • Hose thread: M10x1
  • Brake light switch: Integrated micro-switch, included
  • Reservoir: Not included
  • Road approval: No German approval documented
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
    07 · Support

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