Akrapovic exhaust Yamaha XSR 125 S-Y125R13-HBFGT 360° — drag me
3.03 k g
02 · Data & docs

The facts.

Technical data
BrandAkrapovic
Part numberS-Y125R13-HBFGT
FitmentYamaha XSR 125 (2021–2026)
System typeRacing Line, complete system
MaterialsHigh-grade stainless steel with titanium muffler outer sleeve
Catalytic converter600 cpsi, integrated in the link pipe
Weight3.03 kg (stock 5.19 kg, saving 2.2 kg / 41.6 %)
Power14.1 PS — unchanged, as the A1 class requires
EmissionsEuro 5+
Road approvalEC type approval and ECE type approval
DescriptionThe whole story

A complete exhaust system for a 125, with a catalytic converter and full EC/ECE type approval to Euro 5+. That combination is rare, and it is the whole reason this part exists: an A1 rider can have a hand-built titanium system without putting their registration document at risk.

Key Features

  • 3.03 kg against the standard 5.19 kg: 2.2 kg and 41.6 per cent less
  • 600 cpsi catalytic converter integrated into the link pipe — this is what makes the approval possible
  • EC and ECE type approved and Euro 5+ compliant
  • High-grade stainless steel construction with a lightweight titanium muffler outer sleeve
  • Conical, compact muffler shape drawn to follow the XSR's heritage lines
  • Tuned for throttle response from the full-power 125 cc engine
  • Plug-and-play, no remapping needed

Why the Power Figure Does Not Change

Peak output stays at 14.1 PS, and that is not a shortcoming. The A1 licence class is capped at 15 PS (11 kW), and a 125 sold into that class is built to sit just under the limit. A road-legal exhaust for such a machine cannot lift it past the cap without taking the homologation with it.

What the system does instead is sharpen how the engine responds — Akrapovic names throttle response as the tuning target — while removing 2.2 kg. Anyone promising you a meaningful power increase on a type-approved A1 machine is promising something the law does not allow.

The Converter Is the Point

A 600 cpsi converter sits in the middle of the link pipe. Cell density that high treats the exhaust gas thoroughly enough to clear Euro 5+, which is why this system carries a certificate where most full systems for small bikes do not.

Compare it with a decatted part: the weight would drop further and the noise would rise, but the motorcycle would fail its next inspection. On a bike ridden to school or to work every day, that trade is not worth making.

2.2 Kilograms on a 140 kg Motorcycle

The XSR 125 weighs around 140 kg ready to ride. Removing 2.2 kg is more than one and a half per cent of the whole machine, taken from the high rear — the position where a light bike feels it most in slow manoeuvres and direction changes.

Fitment and Compatibility

S-Y125R13-HBFGT covers the Yamaha XSR 125 from model year 2021 through 2026. Installation is quoted at around 30 minutes.

Road Approval

EC type approval and ECE type approval to Euro 5+, with the certificates supplied and downloadable here. The system is a legal replacement for road use in the European Union and does not affect the A1 classification.

Specifications

  • Part number: S-Y125R13-HBFGT
  • EAN: 3831126442217
  • Fitment: Yamaha XSR 125 (2021–2026)
  • System type: Racing Line, complete system
  • Construction: high-grade stainless steel
  • Muffler outer sleeve: titanium
  • Catalytic converter: 600 cpsi, in the link pipe
  • System weight: 3.03 kg (stock 5.19 kg, saving 2.2 kg / 41.6 %)
  • Power: 14.1 PS, unchanged (gain 0.3 PS at 8,900 rpm within the range)
  • Torque: 11.1 Nm (gain 0.3 Nm at 9,000 rpm)
  • Emissions: Euro 5+
  • Remapping: not required
  • Installation time: approx. 30 minutes
  • Road approval: EC type approval and ECE type approval
  • Country of manufacture: Slovenia
FitmentWhich bikes this fits
  • Yamaha XSR 125 (2021–2026)
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08 · Paddock

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