The facts.
| Part number | CY042 |
|---|---|
| Type | Radial brake master cylinder |
| Piston diameter | 19 mm |
| Pivot distance | 18 mm |
| Lever | Revolution, black, length adjustable with inserts |
| Body finish | Green painted |
| Hose thread | M10x1 |
| Brake light switch | Not included (ID001 or ID002 separately) |
| Reservoir | Not included |
| Road approval | No German approval documented |
DescriptionThe whole story▼
This CY042 is finished with a green painted body over the same forged aluminium casting used across Accossato's painted range, carrying a 19 mm piston for dual-disc front brakes and an 18 mm pivot that suits both track days and ordinary road use. A black Revolution lever is fitted, with its reach adjustable by adding or removing inserts rather than by choosing a separate long or short part.
Key Features
- 19 mm piston diameter for dual-disc front brake systems
- 18 mm lever pivot, for track use and also suited to the road
- Revolution lever in black, length adjustable with inserts
- Forged and painted body in green
- CNC-machined, fully made in Italy
- Offset riser that limits body flex under hard braking
- Stainless steel mounting screws and a zinc-plated bleed valve
- Seals in Formula 1 compound material
Construction and Material Quality
The CY042 body is forged in aluminium, CNC-machined and then painted green, with the mounting hardware fitted afterwards exactly as on the other painted colours: stainless steel screws, a zinc-plated bleed valve and Formula 1 compound seals. An offset riser in the clamp resists flexing as the lever is pulled hard, and the internal bore is shaped so the lever's passive stroke is reduced by more than 50 per cent against an ordinary radial unit.
Offset Riser and Passive Stroke
The offset riser built into this mount is there specifically to stop the body twisting or flexing as braking force comes on, which would otherwise soften the lever feel at the bar. Combined with the internal bore shape, Accossato states that pulling the lever closes more than half of the usual passive travel found on an ordinary radial unit before the pads actually engage, regardless of which colour the body is painted. The offset riser and the shortened passive stroke apply to this green body in exactly the same way as to every other colour in the CY042 range.
Fitment and Compatibility
This green CY042 fits the same 65 motorcycles confirmed for the rest of the line, including the Suzuki GSX-R600, Honda CB1000R, BMW R NineT, Kawasaki Ninja H2 SX and Ducati X Diavel; the Fitment tab has the full list with model years. The 19x18 cylinder with the Revolution lever is also available with black, blue, red, silver and fluorescent yellow painted bodies. Because the lever's reach is set with inserts rather than by a choice of parts, there is nothing extra to specify at checkout beyond the body colour.
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 19x18 radial brake master cylinder with the black Revolution lever, in the green painted body finish. Stainless steel mounting screws, the zinc-plated bleed valve and the Formula 1 compound seals are assembled on the unit. The brake light switch (ID001 or ID002) and the fluid reservoir are not included.
Specifications
- Part number: CY042
- Type: Radial brake master cylinder
- Piston diameter: 19 mm
- Pivot distance: 18 mm
- Lever: Revolution, black, length adjustable with inserts
- Body finish: Green painted
- 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 900 (2017–2019)
- Aprilia RS 660 (2021–2023)
- Aprilia RSV4 (2013–2015)
- Aprilia RSV4 1100 (2019–2023)
- Aprilia RSV4 R (2009–2023)
- Aprilia RSV4 RF (2015–2023)
- Aprilia RSV4 RR (2015–2019)
- Aprilia SHIVER 900 (2017–2020)
- Aprilia TUONO 660 (2021–2023)
- Aprilia TUONO V4 1100 (2015–2016)
- Aprilia TUONO V4 1100 FACTORY (2015–2020)
- Aprilia TUONO V4 1100 RR (2015–2018)
- BMW HP4 (2012–2014)
- BMW K 1300 R (2009–2016)
- BMW K 1300 S (2009–2015)
- BMW K1600 GT (2011–2023)
- BMW K1600 GTL (2011–2023)
- BMW M1000RR (2021–2023)
- BMW R NINET (2014–2016)
- BMW R1200R (2006–2015)
- BMW R18 (2020–2023)
- BMW S1000R (2014–2020)
- BMW S1000RR (2009–2023)
- Ducati DIAVEL (2011–2019)
- Ducati HYPERMOTARD 821 (2013–2016)
- Ducati Hyperstrada 821 (2013–2016)
- Ducati MONSTER 1200 (2014–2021)
- Ducati MONSTER 796 (2011–2016)
- Ducati MONSTER 797 (2017–2021)
- Ducati MULTISTRADA 1200 (2015–2020)
- Ducati MULTISTRADA 1260 (2018–2020)
- Ducati MULTISTRADA 950 (2017–2021)
- Ducati Panigale 1199 (2012–2017)
- Ducati Panigale 1299 (2015–2018)
- Ducati Panigale 899 (2014–2015)
- Ducati Panigale V4 (2018–2023)
- Ducati SCRAMBLER 1100 (2018–2023)
- Ducati STREETFIGHTER V4 (2020–2023)
- Ducati X DIAVEL (2016–2023)
- Honda CB1000R (2018–2023)
- Honda CBR 1000 RR (2008–2019)
- Honda GL1800 GOLD WING (2018–2023)
- Honda RC213V-S (2016–2018)
- Honda VFR1200F (2010–2016)
- Honda VFR800X Crossrunner (2015–2019)
- Kawasaki GTR 1400 (2014–2017)
- Kawasaki NINJA 1000 SX (2020–2023)
- Kawasaki NINJA H2 (2017–2023)
- Kawasaki NINJA H2 SX (2018–2023)
- Kawasaki NINJA H2R (2015–2023)
- Kawasaki Z1000 (2010–2023)
- Kawasaki Z1000R EDITION (2017–2020)
- Kawasaki Z1000SX (2011–2019)
- Kawasaki Z900RS (2018–2020)
- Kawasaki ZX-10 R (2006–2023)
- Kawasaki ZX-10 RR (2016–2023)
- Kawasaki ZX-6R (2003–2016)
- Kawasaki ZZR1400 (2006–2023)
- Suzuki GSX-R 1000 (2003–2023)
- Suzuki GSX-R 600 (2003–2023)
- Suzuki GSX-R 750 (2003–2023)
- Suzuki GSX-R1000R (2017–2023)
- Suzuki GSX-S1000 (2015–2023)
- Suzuki GSX-S1000F (2015–2023)
- Suzuki GSX-S1000GT (2022–2023)
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