Spark Exhaust Grid-O Racing Full System Titanium Pipe Yamaha MT-09 / XSR 900 (2021-2026) GYA8891T
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Spark builds five full systems for the current MT-09. Four of them are homologated. This is the one that is not — stainless manifolds into a hand-welded titanium pipe, and the Grid-O that took the 2020 Moto2 title hanging off the end of it.
Key Features
- Racing full system for the Yamaha MT-09 (2021-2026) and XSR 900 (2022-2025).
- AISI 304 stainless steel manifolds into a racing 3-into-1 pipe, TIG-welded in titanium.
- Grid-O silencer in full titanium with visible TIG welding, low mounting.
- 4,2 kg against 7,0 kg standard: 2,8 kg saved.
- No catalytic converter, no pre-silencer box, no road approval.
- Not compatible with a centre stand.
Where This Sits in Spark's Range
Spark's own page walks through the family in order. First the Euro5+ systems: the Triade with three outlets, the Grid-O with a silenced box, the twin-outlet version with a MotoGP-style mesh. Then, in Spark's words, the racing and extreme proposal — this one.
The difference is what has been taken out. The homologated systems carry a catalytic converter and a stainless pre-silencer box, and those two components are what make the decibel figure legal. Here both are gone, replaced by a single titanium pipe running from the manifolds to the silencer.
The Titanium Pipe
Spark describes it as a racing 3-into-1 TIG-welded pipe in titanium. Hand-welded titanium takes on heat colours across every seam as it is laid down, and Spark leaves them: no polish, no coating, nothing to hide how the joint was made.
The engineering behind it is the part Spark talks about more than the look. The company has been sizing manifolds for three-cylinder engines in Moto2 for years, and it applies the same approach here — diameters and lengths chosen for the CP3's torque delivery rather than for a peak number.
The Moto2 Silencer
The Grid-O on this system is the full titanium article with visible TIG welding — the same silencer Spark supplied to the machine that won the 2020 Moto2 World Championship. It mounts low, in the standard position.
Its mesh end cap is the recognisable part: a large open outlet area spread across many small holes rather than one wide pipe.
Two Restrictions to Settle First
Spark states both in capitals. This system is not recommended for road use and is intended for racing use only — there is no certificate and there will not be one. And it is not compatible with a centre stand: if your MT-09 or XSR 900 has one, it comes off and stays off.
The road-legal alternative on the same motorcycle is GYA8886TOM, which keeps the catalyst and the box and carries an EC certificate.
Almost Three Kilos
7,0 kg standard against 4,2 fitted. Most of that comes from deleting the box and the converter, which are heavy and sit low and central; the rest is the titanium silencer replacing steel at the far end of the motorcycle.
If weight is the objective, the full titanium version of this same system is GYA8893T — the manifolds change material and the price rises accordingly.
Fitment & Compatibility
Yamaha MT-09, 2021 to 2026, and XSR 900, 2022 to 2025. Spark does not list this system for the Tracer 9. The full titanium build is GYA8893T at 2.202 euro; the Euro5+ approved alternative is GYA8886TOM.
Road Approval
None. Spark states not recommended for road use, for racing use only. This system must not be fitted to a motorcycle ridden on public roads.
Specifications
- Part number: GYA8891T
- Type: Full system, racing, low standard mounting
- Silencer design: Grid-O, full titanium, visible TIG welds
- Manifolds: AISI 304 stainless steel
- Mid section: racing 3-into-1 TIG-welded titanium pipe
- Catalytic converter: none
- Weight: 4,2 kg (standard system 7,0 kg)
- Centre stand: not compatible
- Road approval: none — track use only
- Fitment: Yamaha MT-09 (2021-2026), XSR 900 (2022-2025)
- Manufacturer: Spark Exhaust Technology, Mantova, Italy
| Part number | GYA8891T |
|---|---|
| Type | Full system |
| Silencer design | Grid-O |
| Material | Titanium |
| Spark weight | 4.2 kg |
| Standard weight | 7 kg |
| Weight saving | 2.8 kg |
| Mid section | Racing 3-into-1 TIG-welded titanium pipe |
| Catalytic converter | None |
| Centre stand | Not compatible |
- Yamaha MT-09
- Yamaha XSR900
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// Spark Exhaust
Spark Exhaust Grid-O Racing Full System Titanium Pipe Yamaha MT-09 / XSR 900 (2021-2026) GYA8891T

Tech specs
- Part number
- GYA8891T
- Type
- Full system
- Silencer design
- Grid-O
- Material
- Titanium
- Spark weight
- 4.2 kg
- Standard weight
- 7 kg
- Weight saving
- 2.8 kg
- Mid section
- Racing 3-into-1 TIG-welded titanium pipe
- Catalytic converter
- None
- Centre stand
- Not compatible
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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