Spark Exhaust Force Evo Silencer & Cover Group D.65 STEP2 Yamaha R1 (2015-2025) G00SI40T
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The whole visible end of the exhaust, as one part number. Spark's 400 mm titanium Force Evo silencer together with the cover group — the carter, in Spark's own catalogue language — for the D.65 STEP2 full system on the R1.
Key Features
- Force Evo silencer, titanium, 400 mm, with the cover group.
- For Spark's D.65 STEP2 full system on the Yamaha R1 and R1M.
- Within the 102 dB limit of the French championship and the Endurance World Championship.
- Titanium case with a rib converging into the carbon end cap.
- The bare silencer without the cover is SGCM12400025T.
- Not interchangeable with the EWC specification group.
What the Cover Group Adds
Spark sells this assembly two ways: as the silencer alone, and as the silencer with its cover — the shroud that sits over the connection between the collector and the silencer. The difference between the two part numbers is a little over a hundred euros.
Take the group if you are building the system from parts, or if the previous cover went down with the bike. Take the bare silencer if the cover on your R1 is intact and only the case needs replacing. Both are the same 400 mm Force Evo; nothing about the sound or the flow changes between them.
Four Hundred Millimetres
The complete GYA8880T and GYA8881T systems ship with the shorter Force Evo. This group is the long one, and Spark is explicit that the longer Force Evo cases exist specifically to bring the sound level further down.
That makes this a sensible second silencer rather than only a repair part. One collector, two cases, and a bike that can be taken to a circuit with a strict limit on Saturday and one without on Sunday, with a ten-minute change in between.
Fitment & Compatibility
Yamaha R1 and R1M, 2015 through 2025, on Spark's D.65 STEP2 collectors GYA8880R in titanium or GYA8881R in stainless. The equivalent group for the EWC specification is G00SI39T. The G9999 dB killer fits the Force Evo case.
Road Approval
None. No EC certificate, and the D.65 collector this belongs to removes the catalytic converter. Closed circuits only.
Specifications
- Part number: G00SI40T
- Type: Silencer group with cover, full system
- Design: Force Evo
- Material: Titanium with carbon end cap
- Length: 400 mm
- Collector diameter: 65 mm (STEP2)
- Noise: within the 102 dB French championship and EWC limit
- dB killer: not included (G9999 optional)
- Fitment: Yamaha R1 / R1M (2015-2025)
- Road approval: None — track use only
- Manufacturer: Spark Exhaust Technology, Mantova, Italy
| Part number | G00SI40T |
|---|---|
| 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 STEP2 Yamaha R1 (2015-2025) G00SI40T

Tech specs
- Part number
- G00SI40T
- 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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