Spark Exhaust Force Evo Full Titanium System Yamaha R9 (2025-2026) GYA8801T

This is the exhaust Spark homologated for World Supersport: a complete titanium system for the Yamaha R9 that weighs 3.6 kg where the standard unit weighs 7.0 kg. The 3.4 kg it removes come off high and far back on the motorcycle, which is the worst place on a supersport chassis to carry mass — the R9 changes direction differently the first time you ride it.

Key Features

• Complete titanium system: collector, mid-section and Force Evo silencer, 3.6 kg against 7.0 kg for the standard exhaust — a saving of 3.4 kg.
• Approved for World Supersport competition and built to SSP600 specification.
• Measured by Spark at 102 dB at 5,000 rpm and 103 dB at 6,000 rpm, both without a dB killer fitted.
• Force Evo silencer: a titanium case with the rib that runs into the carbon end cap.
• Four carburation ports — one on each cylinder connector and one after the 3-into-1 section.
• Designed for a Supersport chassis; it is not compatible with passenger footpegs.
• Made by Spark in Mantova, Italy.

Build Quality & Materials

Everything from the cylinder connectors to the silencer sleeve is titanium. That is what makes the 3.4 kg possible: titanium carries the exhaust-gas temperature of a 890 cc triple without distorting or discolouring the way thin-wall steel eventually does, and it needs far less mass than stainless steel to reach the same wall strength. The pipe joints are CNC-machined from solid bar rather than pressed, so the system locates precisely and the springs pull the sections into a repeatable position every time the bodywork comes off.

The Force Evo silencer is Spark's quieter race muffler. A single rib runs the length of the titanium case and converges into the lines of the carbon end cap — the shape exists to add stiffness to a thin case, and the visual effect is a by-product. It is the silencer Spark reaches for when a series imposes a decibel ceiling, which is exactly the situation this system was drawn for.

Performance & Sound

Spark quotes two measurements for this configuration without a dB killer: 102 dB at 5,000 rpm and 103 dB at 6,000 rpm. Those are the numbers that matter at scrutineering, and they are why the system passes World Supersport noise control. The collector is 3-into-1 with diameters and tapers taken directly from Spark's championship programme rather than scaled from a road system.

Four carburation ports are built in — one on each cylinder connector and one after the 3-into-1 junction — so a tuner can read each cylinder individually on the dyno instead of inferring from a single downstream sensor. Plan a mapping session: an exhaust of this specification changes the gas flow enough that the standard fuelling is no longer the right answer.

Fitment & Compatibility

GYA8801T is built for the Yamaha R9 in Supersport configuration — that is, a bike running a Supersport chassis. It does not accept passenger footpegs, and it is not the version to buy if your R9 is otherwise standard. For a road-configuration R9 with the stock swingarm, radiator, footpegs and lambda sensor positions, Spark builds the GYA8802T instead, which keeps the same pipe lengths and diameters.

Road Approval

None. This is a competition part with no EC homologation, supplied for closed-circuit use. Fitting it to a motorcycle used on public roads is not permitted.

Specifications

• Part number: GYA8801T
• Type: Full exhaust system (collector + silencer)
• Silencer: Force Evo, titanium with carbon end cap
• Material: Titanium throughout
• Spark weight: 3.6 kg
• Standard weight: 7.0 kg
• Weight saving: 3.4 kg
• Sound level: 102 dB at 5,000 rpm / 103 dB at 6,000 rpm (no dB killer)
• Carburation ports: 4 (one per cylinder connector, one after the 3-in-1)
• Fitment: Yamaha R9 (2025-2026), Supersport chassis
• Passenger footpegs: not compatible
• Road approval: None — track use only
• Manufacturer: Spark Exhaust Technology, Mantova, Italy