⟲ 360° — drag meThe facts.
| Part number | PK039 |
|---|---|
| Type | Radial brake master cylinder |
| Piston diameter | 19 mm |
| Pivot distance | 19 mm |
| Lever | Fixed, long, with relieving eyelet (RST), 7 colours |
| Body | Forged aluminium, CNC-worked cover and lever |
| Hose thread | M10x1 |
| Brake light switch | Not included (ID001 or ID002 separately) |
| Reservoir | Integrated, colour-matched to lever, with oil level marker |
| Road approval | No German approval documented |
DescriptionThe whole story▼
The Accossato PK039 radial brake master cylinder pairs a 19 mm piston with a fixed 19 mm lever pivot distance, a middle setting Accossato describes as suited to mixed track and street use, between the sharper 20 mm pivot and the more relaxed 18 mm version. The fixed lever, offered in seven colours with a relieving eyelet, and the integrated, colour-matched reservoir complete the unit.
Key Features
- 19 mm piston diameter, suitable for dual-disc braking systems
- Fixed 19 mm lever pivot distance, for mixed track and street use
- Fixed lever, long version, with relieving eyelet (RST), seven colours available
- Integrated fluid reservoir with a colour-matched cover, adjusting knob and oil level marker
- Forged aluminium body with a CNC-worked cover and lever
- Offset riser that reduces bending of the master cylinder while braking
- Stainless steel mounting screws and a zinc-plated bleed valve
- Seals manufactured from Formula 1 compound material
Construction and Material Quality
Body, cover and lever follow the same forged-and-CNC-worked construction used throughout the integrated-reservoir brake range, finished with stainless steel screws, a zinc-plated bleed valve and Formula 1 compound seals. The offset riser reduces flex of the unit under hard braking, and the passive lever stroke is shortened by more than half compared with a conventional radial master cylinder, the same baseline improvement Accossato builds into every pivot distance in the 19 mm family.
A Middle Setting Between 18 and 20 mm
The 19 mm pivot distance sits deliberately between the 18 mm version, recommended for street use, and the 20 mm version, reserved for track and competition riding, giving a lever feel Accossato rates for mixed track and street use rather than firmly recommending or ruling out either. For a rider who splits their time between road riding and the occasional trackday, this middle setting avoids the two compromises at either end of the range: the softer bite of the 18 mm pivot on track, and the firmer lever force the 20 mm pivot asks for on the road. The 19 mm piston itself remains sized for dual-disc front brakes, as on the rest of this part of the range.
Fitment and Compatibility
This master cylinder is listed against 65 motorcycles in our fitment data, including the BMW S1000R (2014-2020), Honda VFR1200F (2010-2016), Kawasaki Z1000SX (2011-2019) and Ducati MONSTER 1200 (2014-2021), across Aprilia, BMW, Ducati, Honda, Kawasaki and Suzuki ranges. Complete model-year coverage for this part number is shown in the Fitment tab on this page; please match it against your own vehicle documents 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 PK039 radial brake master cylinder with its integrated reservoir, fitted with a long fixed 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 brake light switch, available separately as ID001 or ID002, and the mirror holder, available separately as MH007 or MH008, are not included.
Specifications
- Part number: PK039
- Type: Radial brake master cylinder
- Piston diameter: 19 mm
- Pivot distance: 19 mm
- Lever: Fixed, long, with relieving eyelet (RST), 7 colours
- Body: Forged aluminium, CNC-worked cover and lever
- Hose thread: M10x1
- Brake light switch: Not included (ID001 or ID002 separately)
- Reservoir: Integrated, colour-matched to lever, with oil level marker
- 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 FACTORY (2017–2023)
- 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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