Spark Exhaust Force Evo Silencer & Cover Group D.65 EWC Yamaha R1 (2015-2025) G00SI39T
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Endurance specification, complete. The 400 mm titanium Force Evo with its cover group, built for the D.65 EWC collector — the configuration Spark introduced in 2023 and runs in the Endurance World Championship.
Key Features
- Force Evo silencer, titanium, 400 mm, with cover group.
- For Spark's D.65 EWC collector on the Yamaha R1 and R1M.
- Within the 102 dB limit of the French championship and the Endurance World Championship.
- The EWC version is not compatible with the passenger footrests.
- The silencer alone, without the cover, is SGCM12400026T.
- Distinct from the STEP2 group G00SI40T — order by the collector you own.
Built to Be Taken Off
Endurance racing puts a peculiar demand on an exhaust: it has to survive twenty-four hours, and it has to come off fast if it is damaged in the middle of them. A silencer and its cover sold as one group is a service-friendly arrangement rather than a marketing bundle — one part number, one box, everything that hangs on the connecting pipe.
For a customer that translates into fewer questions during a rebuild. If the tail of the exhaust needs replacing after a long season, this number replaces all of it in one go.
What EWC Costs You
Spark states that the EWC version is not compatible with the passenger footrests, and that is the one thing worth checking before committing to this half of the range. The STEP2 systems keep them; the endurance configuration does not.
On a bike that has never carried a pillion it is not a cost at all. On a road-registered R1 it is the difference between a motorcycle two people can use and one that seats a rider only — and no amount of racing pedigree makes that decision for you.
Fitment & Compatibility
Yamaha R1 and R1M, 2015 through 2025, on Spark's D.65 EWC collector GYA8894R. The complete system is GYA8894T. The equivalent group for the STEP2 collectors is G00SI40T. The G9999 dB killer fits the Force Evo case.
Road Approval
None. No EC certificate, and the collector this belongs to removes the catalytic converter. Closed circuits only.
Specifications
- Part number: G00SI39T
- Type: Silencer group with cover, full system, EWC specification
- Design: Force Evo
- Material: Titanium with carbon end cap
- Length: 400 mm
- Collector diameter: 65 mm
- Passenger footrests: not compatible (Spark)
- Noise: within the 102 dB French championship and EWC limit
- Fitment: Yamaha R1 / R1M (2015-2025)
- Road approval: None — track use only
- Manufacturer: Spark Exhaust Technology, Mantova, Italy
| Part number | G00SI39T |
|---|---|
| Type | Silencer |
| Silencer design | Force Evo |
| Material | Titanium |
| Dimensions | Ø 65 mm, 400 mm long |
| Fitment | Yamaha R1 / R1M (2015-2025) |
| Road approval | None — track use only |
| Origin | Made in Italy |
- Yamaha R1
- Yamaha R1M
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// Spark Exhaust
Spark Exhaust Force Evo Silencer & Cover Group D.65 EWC Yamaha R1 (2015-2025) G00SI39T

Tech specs
- Part number
- G00SI39T
- Type
- Silencer
- Silencer design
- Force Evo
- Material
- Titanium
- Dimensions
- Ø 65 mm, 400 mm long
- Fitment
- Yamaha R1 / R1M (2015-2025)
- Road approval
- None — track use only
- Origin
- Made in Italy
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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