The facts.
| Part number | CY045 |
|---|---|
| Type | Radial brake master cylinder |
| Piston diameter | 16 mm |
| Pivot distance | 18 mm |
| Lever | Revolution, black, adjustable reach |
| Body finish | Coated blue, forged aluminium |
| Hose thread | M10x1 |
| Brake light switch | Not included (ID001 or ID002 separately) |
| Reservoir | Not included |
| Road approval | No German approval documented |
DescriptionThe whole story▼
Accossato offers this 16x18 radial brake master cylinder with its body painted coated blue, a colour aimed at riders who want a splash of contrast on the bars rather than a plain finish. It keeps the same 16 mm piston and 18 mm pivot distance as the rest of the 16x18 line, a combination Accossato recommends for track riding and also considers suitable for the street, and it comes fitted with the black Revolution lever as standard. The target use is single-disc front brakes on roadsters, adventure machines and tourers that call for a firmer, more direct lever feel.
Key Features
- 16 mm piston diameter, suitable for single-disc braking systems
- Fixed 18 mm lever pivot distance, for track use and also suited to the road
- Forged aluminium body finished in coated blue paint
- Black Revolution lever, reach adjusted by adding or removing inserts
- Offset riser that limits master cylinder flex under braking
- Passive lever stroke cut by more than 50 percent versus a standard radial unit
- Stainless steel mounting screws and a zinc-plated bleed valve
- Seals manufactured from Formula 1 compound material
Construction and Material Quality
The body of this unit begins as a forged aluminium casting, then takes the coated blue paint that sets it apart visually from its siblings in the same 16x18 line. The internal specification does not change with the colour: stainless steel screws hold the unit to its mount, the bleed valve is zinc-plated steel, and the seals are manufactured from Formula 1 compound to resist repeated heat cycling and prolonged exposure to brake fluid. A riser built into the mounting clamp is offset to reduce flex in the body when the brake is applied hard, and the bore inside is shaped to cut the passive stroke, the lever movement before the pads start to bite, by more than half compared with a standard radial unit.
What the 18 mm Pivot Distance Changes at the Lever
This coated blue master cylinder uses the 16 mm piston Accossato specifies for single-disc braking together with an 18 mm pivot distance, described by the manufacturer as the track setting that is also suitable for street use. Compared with the softer 16 mm pivot elsewhere in the 16x16 line, the 18 mm distance needs a touch more hand pressure at the lever but delivers a shorter stroke and a sharper, more immediate bite once the pads engage. The pivot is fixed on this model, so there is no PRS adjustment to make; a rider chooses this version precisely because they want that one firmer, more direct feel every time, with the blue paint offering a visual way to pick it out from a black or silver sibling on the shelf.
Fitment and Compatibility
BMW, Honda, Kawasaki, Suzuki, Aprilia and Ducati machines make up the 54 entries in our fitment data for this master cylinder; the BMW S1000 XR, Honda CB1100RS, Kawasaki VULCAN S, Suzuki SV650 and BMW F850GS ADVENTURE are a handful of examples. Open the Fitment tab on this page for every model year and weigh it against your own V5 before buying. In black, green, red, silver or fluorescent yellow, the same body is sold separately too.
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 16x18 radial brake master cylinder finished in coated blue, fitted with the black Revolution lever, stainless steel mounting screws, the zinc-plated bleed valve and the Formula 1 compound seals already assembled. 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: CY045
- Type: Radial brake master cylinder
- Piston diameter: 16 mm
- Pivot distance: 18 mm
- Lever: Revolution, black, adjustable reach
- Body finish: Coated blue, forged aluminium
- 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▼
- Aprilia DORSODURO 1200 (2011–2016)
- BMW F750GS (2020–2023)
- BMW F800GS (2008–2023)
- BMW F800GS Adventure (2013–2016)
- BMW F800GT (2012–2020)
- BMW F800R (2009–2017)
- BMW F850GS (2019–2023)
- BMW F850GS ADVENTURE (2019–2023)
- BMW F900R (2019–2023)
- BMW F900XR (2019–2023)
- BMW G310GS (2017–2020)
- BMW G310R (2016–2020)
- BMW R NINET (2016–2023)
- BMW R NINET PURE (2016–2023)
- BMW R NINET RACER (2016–2023)
- BMW R NINET SCRAMBLER (2016–2023)
- BMW R NINET URBAN G (2020–2023)
- BMW R1200GS (2016–2018)
- BMW R1200GS ADVENTURE (2013–2018)
- BMW R1200R (2015–2023)
- BMW R1200RS (2015–2018)
- BMW R1200RT (2016–2018)
- BMW R1250GS (2019–2023)
- BMW R1250GS ADVENTURE (2018–2023)
- BMW R1250R (2019–2023)
- BMW R1250RS (2019–2023)
- BMW R1250RT (2019–2023)
- BMW S1000 XR (2015–2023)
- Ducati SCRAMBLER 400 (2016–2021)
- Honda CB1100 (2017–2021)
- Honda CB1100RS (2017–2020)
- Honda NT1100 (2022–2023)
- Kawasaki ER-6 F (2012–2016)
- Kawasaki ER-6N (2012–2016)
- Kawasaki NINJA 650 (2017–2018)
- Kawasaki VERSYS 1000 (2012–2023)
- Kawasaki VERSYS 650 (2007–2020)
- Kawasaki VERSYS-X 300 (2017–2023)
- Kawasaki VULCAN S (2017–2020)
- Kawasaki W800 (2011–2018)
- Kawasaki Z300 (2015–2018)
- Kawasaki Z650 (2017–2023)
- Kawasaki Z800 (2013–2016)
- Kawasaki Z800E (2013–2016)
- Kawasaki Z900 (2017–2023)
- Suzuki DL1000 V-STROM (2014–2019)
- Suzuki DL1050 V-STROM (2020–2023)
- Suzuki DL650 V-STROM (2012–2020)
- Suzuki GSF1250 BANDIT (2007–2016)
- Suzuki GSR750 (2011–2016)
- Suzuki GSX-S750 (2017–2023)
- Suzuki SFV650 GLADIUS (2009–2015)
- Suzuki SV650 (2016–2023)
- Suzuki SV650X (2018–2023)
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