MSR (engine drag torque control)

Engine Drag Torque Control (MSR) is an electronic safety feature available on many modern BMW Motorrad bikes, typically as part of the optional "Riding Modes Pro" package. MSR prevents the rear wheel from skidding during aggressive downshifts or when rolling off the throttle quickly, especially on low-friction surfaces. Instead of a mechanical slipper clutch, MSR electronically manages engine torque by momentarily opening the throttle butterflies slightly to reduce the engine's braking effect and prevent rear wheel hop. 

The retrofit of MSR is almost always a software-only procedure, provided the motorcycle is already equipped with the necessary hardware to enable it. This is similar to the ABS Pro retrofit, which also relies on existing sensors. 

Preconditions for MSR retrofit

The ability to retrofit MSR depends entirely on whether the bike has the required sensors and control units already installed.

• Existing hardware: The MSR system relies on existing sensors used for other dynamic functions, such as the Inertial Measurement Unit (IMU), wheel speed sensors for ABS, and throttle position sensors. Bikes that come from the factory with Dynamic Traction Control (DTC) or Riding Modes Pro usually have the required hardware.

• Model compatibility: MSR is available on many modern BMW motorcycles, including the R 1250 and S 1000 series. Compatibility varies by model and model year, so it's essential to confirm that your specific bike can support the feature. 

Retrofit procedure

Unlike a hardware retrofit like the Shift Assistant Pro, there is no physical installation for MSR. The procedure is purely electronic and must be performed by a professional with the correct diagnostic equipment. 

Step 1: Pre-procedure checks

• A technician first verifies the bike's compatibility and ensures all required hardware is present.

• The Vehicle Identification Number (VIN) is used to generate a Feature Enabling Code (FSC), which is required to unlock the feature in the bike's software. 

Step 2: Electronic coding and activation

1. Connect diagnostic tool: A technician connects a BMW-specific diagnostic tool (like ISTA) to the bike's diagnostic port.

2. Update Vehicle Order (VO): The MSR option is added to the bike's vehicle order. This is a list of all the features and equipment the bike was built with.

3. Code the ECU: The engine control unit (ECU) is then recoded to activate the MSR software. The FSC code is used to authenticate and allow this process. 

Step 3: Final steps

• After the coding is complete, the motorcycle is tested to ensure all systems function correctly.

• The instrument cluster will confirm that the new feature is enabled, and the MSR function can typically be adjusted within the bike's settings menu, often linked to the different riding modes. 

Key considerations for MSR retrofit

• Professional installation is required: Due to the complex nature of ECU coding and the need for a specific enablement code, this is not a DIY procedure. A BMW Motorrad dealer or specialist is required to perform the work.

• Part of a larger package: MSR is often part of a larger "Riding Modes Pro" software package that includes other features like ABS Pro and Dynamic Brake Control (DBC). Retrofitting MSR may also require enabling these other features if the bike has the hardware for them.

• Integrated function: MSR works in concert with other systems on the bike, such as the throttle-by-wire and IMU, to achieve its effect. A proper retrofit ensures this integration is seamless and reliable. 

Engine Drag Torque Control (MSR) is generally available as a retrofit for many modern BMW Motorrad models that are already equipped with the necessary electronic hardware, such as an Inertial Measurement Unit (IMU). This typically includes bikes that came with optional features like Dynamic Traction Control (DTC) or Riding Modes Pro from the factory. Since the retrofit is a software upgrade, it is most common on models with ride-by-wire throttles. 

Here is a list of common BMW Motorrad model series where MSR retrofit is often possible:

GS/Adventure Series

• R 1250 GS and GSA: Models equipped with "Riding Modes Pro" from the factory can often be updated via software.

• R 1300 GS and GSA: Later models may support the retrofit if not included from the factory.

• F 900 GS and GSA: Many of these models were built with the necessary electronics for an MSR software retrofit. 

Sport Series

• S 1000 RR (2020 onwards): For the 2023 model year, MSR was made available on the S 1000 RR and can be retrofitted on compatible bikes.

• S 1000 R and XR: These models, particularly later generations, can often have MSR added via a software update. The F 900 R and XR were also released with MSR as an option. 

Roadster/Heritage Series

• R 1250 R and RS: Models with the necessary electronics for DTC or Riding Modes Pro are generally compatible.

• R 12 and R 12 nineT (newer models): These bikes may have MSR as a factory option, and if they have the necessary hardware (like the IMU for cornering ABS), they might be able to get MSR enabled. 

Touring Series

• R 1250 RT: As part of the "Riding Modes Pro" option, MSR can often be activated via software on compatible models.

• K 1600 Series (GT, GTL, Bagger): Many later-model K1600s with existing advanced rider electronics packages can have MSR enabled. 

How to check for compatibility

To determine if your specific motorcycle can be retrofitted with MSR, the most reliable method is to:

1. Check factory options: Review your bike's original factory build sheet. If it already has Dynamic Traction Control (DTC) or Riding Modes Pro, a retrofit is very likely.

2. Consult a dealer: The most definitive way is to have an authorized BMW Motorrad dealer check your Vehicle Identification Number (VIN). Their diagnostic software can determine if your bike's hardware and electronics are compatible with the MSR software update.

3. Use a diagnostic tool: Some advanced third-party diagnostic tools, like Motoscan Ultimate, might be able to confirm compatibility, but an official FSC code from BMW will still be required for activation. 

Important note

MSR is a complex, software-dependent feature. Unlike a mechanical component, it relies on seamless integration with the bike's IMU, throttle-by-wire, and ABS system. Because of this, it is not a "bolt-on" part and requires professional coding to enable.