Akrapovic exhaust BMW R1250GS S-B12SO23-HAATBL 360° — drag me
4.8 k g
02 · Data & docs

The facts.

Technical data
BrandAkrapovic
Part numberS-B12SO23-HAATBL
FitmentBMW R 1250 GS (2019–2023)
System typeSlip-on silencer, black finish
MaterialsTitanium outer sleeve, carbon fibre parts
Weight4.8 kg (stock 5.2 kg, saving 0.4 kg / 7.7 %)
Power126.6 PS (stock 123.3 PS, gain 3.5 PS at 7,400 rpm)
Torque136.6 Nm (stock 132.2 Nm, gain 5.0 Nm at 5,900 rpm)
NoteNo removable noise insert supplied
Road approvalEC type approval and ECE type approval
DescriptionThe whole story

Five newton metres at 5,900 rpm and three and a half horsepower at 7,400. On a ShiftCam boxer those are large numbers for a silencer swap, and they land in the band a loaded GS holds on a long day.

Key Features

  • 5.0 Nm more at 5,900 rpm, with peak torque rising from 132.2 to 136.6 Nm
  • 3.5 PS more at 7,400 rpm, peak output rising to 126.6 PS
  • 4.8 kg against the standard 5.2 kg: 0.4 kg and 7.7 per cent less
  • Titanium outer sleeve with carbon fibre parts, black finish
  • Twenty minutes to fit
  • EC and ECE type approved
  • No removable noise insert is supplied

Black or Natural — the Same Silencer

Akrapovic offers this system in two finishes for the same motorcycle. S-B12SO23-HAAT is the natural titanium version; this one, with BL in the part number, is black-coated. Dimensions, weight and measured figures are identical.

The choice is what suits your GS. On a Triple Black or a Rallye in dark paint the coated version disappears into the machine; on a lighter colour scheme the natural titanium reads better. The coating also hides the heat tint that bare titanium develops within a season.

Where the Torque Actually Helps

An R 1250 GS is geared long and usually ridden loaded. 5,900 rpm in fifth or sixth is overtaking on a country road with panniers and a passenger, and 5 Nm there is felt without a downshift.

The 7.7 per cent weight saving is the smaller half of the story and this page does not pretend otherwise. BMW's standard silencer is already a reasonably light unit; the reason to fit this one is the torque, the sound and the finish.

One Thing to Know

No removable noise insert is supplied. The sound level is what the silencer produces as built — type approved at that level, but not adjustable for an early start.

Five Newton Metres Is a Lot for a Slip-On

Most silencers in this catalogue add between one and three newton metres. This one adds five, and 3.5 PS with it — figures that usually come from a full system rather than a silencer swap.

The reason is the part it replaces. BMW's standard R 1250 GS silencer is heavily baffled to meet noise limits on a 136 Nm boxer, and opening that path releases more than it would on a bike with a less restrictive original.

What Stays Standard

The header, the catalytic converter and the engine management are untouched, and no remapping is required. The original silencer refits in twenty minutes if the GS is sold in factory condition — worth knowing on a motorcycle with this strong a used market.

Fitment and Compatibility

S-B12SO23-HAATBL covers the BMW R 1250 GS from model year 2019 through 2023. For the R 1300 GS from 2024 the corresponding parts are S-B13SO4-HJGT and S-B13SO4-HJGTBL — different systems that do not carry over.

Road Approval

EC type approval and ECE type approval, with the certificates supplied and downloadable here. The silencer is a legal replacement part for road use in the European Union.

Specifications

  • Part number: S-B12SO23-HAATBL
  • EAN: 3831113566841
  • Fitment: BMW R 1250 GS (2019–2023)
  • System type: slip-on silencer, black finish
  • Outer sleeve: titanium, with carbon fibre parts
  • System weight: 4.8 kg (stock 5.2 kg, saving 0.4 kg / 7.7 %)
  • Power: 126.6 PS (stock 123.3 PS, gain 3.5 PS at 7,400 rpm)
  • Torque: 136.6 Nm (stock 132.2 Nm, gain 5.0 Nm at 5,900 rpm)
  • Noise insert: not supplied
  • Installation time: approx. 20 minutes
  • Road approval: EC type approval and ECE type approval
  • Country of manufacture: Slovenia
FitmentWhich bikes this fits
  • BMW R 1250 GS (2019–2023)
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08 · Paddock

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