We first broke the story back in August that BMW was preparing a new M 1000 RS model. At the time, we only had evidence of the mystery bike via U.S. emissions certifications confirming the model name. Assuming BMW was sticking to its usual nomenclature, we believed the M 1000 RS was going to be a sport-touring model ("Reise und Sport" in German.)

Motorcycle.com can now confirm our initial assumption was wrong, and the 2027 BMW M 1000 RS will actually be a higher-performance version of the M 1000 R. We have obtained homologation data for the M 1000 RS from Switzerland indicating the new model will be based on the M-R, but have the M 1000 RR's more powerful engine and a few other changes.

So, instead of following in the vein of the R 1300 RS or the 1976 R 100 RS, the new RS will be more of a "Rennsport" or "motorsport" model, adopting the same definition other manufacturers like Ducati or Triumph use.

BMW has already teased a new naked model on Instagram and set up a YouTube launch video (embedded below) that will premiere on November 3. While the bike is not named, we're all but certain it will be the new M 1000 RS.

The Swiss homologation filing identifies the M 1000 RS with the type code "SN99," which is the same code used for the M-R. This tells us that the M-RS will be a variant of the streetfighter. The filing also confirms the M 1000 RS will use the M 1000 RR's version of the 999cc inline-Four ShiftCam engine, certified with the same peak performance figures of 215 hp at 11,000 rpm and 83.3 lb-ft. at 11,000 rpm. This presents a performance upgrade over the M 1000 R which is certified with 207 hp at 13,750 rpm, and the same peak torque.

Despite having the same engine as the M 1000 RR, the M-RS's certified top speed of 175.8 mph is closer to the M 1000 R's certified 174.0 mph than the M 1000 RR, which is listed at 195 mph.

The data confirms the M 1000 RS will have the same height and width as the M 1000 R, but its 82.5-inch length is 0.4 inches longer. Some of that increased length comes from a longer wheelbase, with the Swiss data listing the M 1000 RS at 57.9 inches versus 57.7 inches for the M 1000 R, and 57.4 inches for the M 1000 RR.

The homologation data also lists the M 1000 RS's tare weight as 597.5 pounds, which translates to a curb weight of 432 pounds, making it lighter than the M 1000 R (430 pounds). The data doesn't tell us where the weight difference comes from, but we suspect the M 1000 RS will use the new frame introduced on the 2027 M 1000 RR, which is about 2.9 pounds lighter than the previous frame.

While BMW's teaser and the homologation data gives us some data on the M 1000 RS, we still don't know what else BMW has done to "redefine naked performance." For that, we'll have to wait for the official announcement Nov. 3 at EICMA.