
The facts.
| Part number | Z-S001-EX (EAN 4950545750129) |
|---|---|
| Pad code | ZRM-S001C |
| Compound | ZCOO EX Race - ceramic-sintered |
| Pad dimensions | 69.5 x 50.5 x 8.8 mm (L x H x thickness) |
| Caliper family | Sumitomo (Yamaha) |
| Position | Front axle only |
| Fitment | Yamaha XSR900, 2017-2022 |
| Contents per pack | 1 set = 2 pads for one caliper; a machine with twin front discs needs two packs |
| Road approval | No ECE R90 type approval documented - track and competition use |
| Manufacturer | Okada Corporation, Japan |
DescriptionThe whole story▼
Weight transfer is the whole story on a machine like the Yamaha XSR900. On this machine the reference is the S001, 69.5 mm of friction face in the Sumitomo caliper. In EX Race form it is the compound an XSR900 rider can use from the first cold stop of the day.
Key Features
- Wear indicator geometry unchanged from the standard Sumitomo pad, so the usual inspection still applies on the XSR900
- Progressive rather than digital: on the Yamaha XSR900 the first millimetre of lever travel produces the first millimetre of deceleration
- Consistent friction from the first lap to the wear limit, so the braking marker set on a cold XSR900 still means the same thing when it is hot
- Developed on the same ceramic platform ZCOO supplies to endurance teams at Suzuka and the Bol d'Or
- No ECE R90 type approval is documented for this compound - treat the S001 as a track and competition part
- The S001 is dimensionally stable under the clamping load a Sumitomo caliper generates
Construction and Material Quality
Construction on the S001 follows ZCOO's racing practice throughout. Expansion gaps between the friction blocks let the S001 material grow into the gaps when hot instead of building stress against itself. Both details exist so the S001 keeps its pressure distribution honest as it wears down.
Performance and Feel
The useful measure of an XSR900 pad is not one hard stop but a hundred ordinary ones. Across 6 model years of the XSR900 the behaviour is the same, because the compound is. With no fairing to lean into, the XSR900 rider needs the S001 to be predictable above all.
Fitment and Compatibility
This reference is catalogued for the Sumitomo-equipped Yamaha XSR900, 2017 to 2022. The same S001 shape covers 27 further machines in the 2026 catalogue. Nothing in the ZCOO range fits the rear axle of the XSR900. Before ordering, check that your caliper takes a pad of 69.5 mm length and 50.5 mm height.
Road Approval
No ECE R90 type approval is documented for this pad. It appears neither in ZCOO's own catalogue nor on the European distributor's site, and no approval number is printed on the packaging data available to us. ZCOO itself describes the compound as suited to competition machines and road machines alike, but that is a description of the mixture, not a type approval. Until the distributor confirms an approval in writing, treat this as a track and competition part: in Germany a replacement brake pad without ECE R90 approval may not be fitted to a motorcycle used on public roads. Ask us before ordering if you need this clarified for your machine.
Specifications
- Part number: Z-S001-EX (EAN 4950545750129)
- Pad code: ZRM-S001C
- Compound: ZCOO EX Race - ceramic-sintered
- Pad dimensions: 69.5 x 50.5 x 8.8 mm (L x H x thickness)
- Caliper family: Sumitomo (Yamaha)
- Position: Front axle only
- Fitment: Yamaha XSR900, 2017-2022
- Contents per pack: 1 set = 2 pads for one caliper; a machine with twin front discs needs two packs
- Road approval: No ECE R90 type approval documented - track and competition use
- Manufacturer: Okada Corporation, Japan
What's includedEverything in the box▼
- 1 set = 2 ZCOO S001 EX brake pads for one caliper
FitmentWhich bikes this fits▼
- Yamaha XSR900 (2017–2022)
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