Accossato radial brake master cylinder CY113 with black lever⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
Part numberCY113
TypeRadial brake master cylinder (Ready To Brake)
Piston diameter15 mm
Pivot distance18 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▼

The Accossato Ready To Brake 15x18 is a radial brake master cylinder sized for naked and motard machines, pairing a 15 mm piston with a fixed 18 mm lever pivot distance that Accossato rates for track use and also recommends for everyday street riding. Like the rest of the Ready To Brake range the passive stroke of the braking process is cut down across the board without any adjustment needed, and an integrated micro-switch takes care of the brake light function inside the shark-shaped body. The long folding lever, fitted with a relieving eyelet, is offered in seven colours.

Key Features

  • 15 mm piston diameter, suggested for naked and motard bikes
  • Fixed 18 mm lever pivot distance, for track use and also recommended on the road
  • Folding lever, long version, with relieving eyelet (RST), available in seven colours
  • Integrated micro-switch built into the shark-shaped body for the brake light
  • Offset fixing riser with a quick-release jumper for faster servicing
  • CNC-machined aluminium, fully made in Italy
  • 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 CNC machined from aluminium and assembled entirely in Italy, using the same hardware specification across the Ready To Brake line: stainless steel mounting screws, a zinc-plated bleed valve and seals made from Formula 1 compound that continue to seal through repeated heat cycles and fluid contact. The clamp is offset to reduce bending of the unit while the brake is applied hard, and the quick-release jumper built into the riser lets the master cylinder be lifted off the bar for servicing without disturbing the hose. Every internal passage is shaped to keep the lever's passive travel as short as practical, which is the idea behind the Ready To Brake name.

Piston Diameter and Fixed Lever Pivot Explained

Unlike the PRS versions in the Accossato range, the 15x18 uses one fixed pivot distance rather than a rider-adjustable one, which keeps the lever simpler and a little lighter for applications where a single, consistent setting is all that is needed. The 15 mm piston diameter sits between the smaller 14 mm size aimed at scooters and the larger bores used on full-size sport machines, and Accossato suggests it specifically for naked and motard bikes where the brake has to work well both on tight, technical roads and on the odd trackday. The 18 mm pivot distance is described as suited to track use and is also recommended for street riding, giving a lever feel that favours a direct, positive bite over an especially light touch.

Fitment and Compatibility

This master cylinder is not matched to specific models; it ships as a universal fit for naked and motard machines running a 15 mm radial system. Riders should confirm three things before buying: a 22 mm handlebar clamp, a brake system engineered around a 15 mm piston, and callipers plus discs already sized for that bore.

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 15x18 radial brake master cylinder with the integrated micro-switch, fitted with a long folding lever and relieving eyelet (RST) in the colour selected, together with the 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: CY113
  • Type: Radial brake master cylinder (Ready To Brake)
  • Piston diameter: 15 mm
  • Pivot distance: 18 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

    Questions, one topic at a time.

    Estimate your shipping

    Get the real shipping cost for this item to your address — the same rates as checkout.

    Pick your countrySame rates as checkout

    Choose a destination and hit Estimate — we fetch the live rates for this item.

    How long does delivery take?

    We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.

    How much does shipping cost?

    Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.

    Do you ship to my country?

    Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.

    Will I have to pay customs or import duties?

    Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.

    How can I track my order?

    As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.

    What if an item is out of stock?

    On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.

    Didn’t find your answer?

    Our team will personally help you choose the right gear or part — around 24h for a reply.