Accossato radial brake master cylinder CL077 with black lever⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
Part numberCL077
TypeRadial brake master cylinder
Piston diameter17 mm
Pivot distance19 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▼

This folding-lever 17x19 pairs the mixed track and street 19 mm pivot distance with the same 17 mm piston, suited to callipers with mounting bolts 32 mm apart or closer, found on the fixed-lever version. The folding lever hinges back under an impact rather than breaking, which some riders prefer regardless of pivot setting, while the relieving eyelet, lever colour range and matching adjusting knob stay the same as the rest of the 17 mm family.

Key Features

  • 17 mm piston diameter, suggested for motorcycles with calliper mounting bolts 32 mm apart or less
  • 19 mm fixed lever pivot distance for mixed track and street use
  • Folding lever, long version, with a relieving eyelet (RST)
  • Lever supplied in a choice of colours, with a matching adjusting knob
  • CNC-machined aluminium body with a natural anodised finish
  • 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, zinced bleed valve and Formula 1 compound seals

Construction and Material Quality

This master cylinder is forged and CNC machined from aluminium in Italy, with a natural anodised finish applied to the body. Stainless steel mounting screws, a zinced bleed valve and Formula 1 compound seals are fitted to resist heat cycling and ongoing brake fluid contact. An offset riser is built into the clamp to reduce how far the body flexes under hard braking, and the internal passages are shaped to keep the passive stroke well under half the length of a standard radial unit. The hose connection uses the usual M10x1 thread.

Folding Lever Tuned for Mixed Track and Road Use

The 17 mm piston and 19 mm pivot distance here match the fixed-lever version exactly, giving the same mixed track and street character, pitched between the balanced 18 mm setting and the firmer 20 mm option in this bore size. The folding lever changes only how the control reacts to an impact, hinging back rather than snapping, which matters most to riders who regularly drop their bike at low speed or knock the lever while manoeuvring in tight spaces. For anyone who has already chosen the 19 mm pivot for its blend of road comfort and occasional sharper response, the folding lever is simply the more resilient option.

Fitment and Compatibility

There is no manufacturer vehicle list for this master cylinder; as a universal 17 mm radial unit, it suits handlebars with a 22 mm clamp rather than a confirmed set of motorcycles. Check your own clamp diameter, verify your brake system is built around a 17 mm piston, and measure your calliper's mounting bolt spacing 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 17x19 radial brake master cylinder fitted with the folding, long lever with relieving eyelet, in the colour selected, together with the matching mounting nut. Stainless steel mounting screws, the zinced 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: CL077
  • Type: Radial brake master cylinder
  • Piston diameter: 17 mm
  • Pivot distance: 19 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▼
    07 · Support

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