1250cc Boxer

Enjin Boxer BMW R 1250 GS dengan “ShiftCam” – Sumber imej:
  • Desas desus mengatakan bahawa model R 1250 GS yang baharu akan dijana oleh sebuah enjin Boxer baharu dengan pemasaan injap boleh laras.
  • Satu video promosi telah muncul di atas talian mengesahkan khabar angin tersebut.
  • Video itu juga telah menunjukkan bagaimana teknologi “Shift Cam” berfungsi serta rupa GS yang baharu.


  • It has been rumoured that the new R 1250 GS will be powered by a new Boxer engine with variable valve timing.

  • A promotional video has surfaced online confirming the rumors.

  • The video also illustrates how the “Shift Cam” technology works besides the look of the new GS.

It was hotly rumoured that the new 1254cc Boxer engine in the new 2019 BMW R 1250 GS will feature variable valve and cam timing but there was no concrete proof. But now, a promotional video has surfaced online which illustrates the new Boxer engine with “Shift Cam” technology, courtesy of

The system aims to provide the best acceleration along with high power gains, while maintaining smooth power delivery, and lower fuel consumption as well as exhaust emissions to meet the tough Euro 5 standard.

To achieve those targets, the BMW Shift Cam system is simple, utilizing an intake camshaft with two cam profiles and a mechanical shift gate at one end.

At low engine loads (lower RPMs), the shift gate engages the camshaft and locks the low lift and short duration cam lobes over the finger followers. That way, both intake and exhaust vavles shut quickly for less overlap, promoting low-end torque.

Conversely, at high engine loads (higher RPMs), the shift gate… er… shifts the camshaft to present the high lift and longer duration cam lobes. Consequently, the intake valves shut later for more valve overlap timing, raising the engine’s power output.

It is the best of both worlds. (You may read more about valve overlap in this article.)

The new Boxer is claimed to produce 136 bhp and 143 Nm of torque, up from 125 bhp and 125 Nm of the present 1176cc engine.

Valve cover of the new engine – Courtesy of

Besides seeing how the new engine works, the video also revealed how the 2019 BMW R 1250 GS will look like.

As we have reported earlier, the new engine may also power the entire Boxer-engined line-up. The R 1250 GS and new models should make their first official appearance at the Intermot show in a few weeks’ time.

  • The 1200cc Boxer engine and bikes that it powers have been revised through each generation.

  • With stiff competition from all corners, it is rumoured that BMW will debut the R 1250 GS in 2019.

  • A new R 1250 RT has been spotted undergoing road trials.

BMW’s venerable boxer engine has come a long, long way and there’s no end in sight for it. the German giant may produce the superb S 1000 RR inline-Four superbike, but what is BMW Motorrad if not for the flat-Twin or Boxer, as it’s affectionately known.

It is likewise the scenario for the Boxer-engine GS, since the first R80GS.

2018 BMW R 1200 GS Rallye

But the competition has been aggressive in the large-capacity adventure segment. KTM, Ducati and now Triumph are carving out large pieces of the pie and BMW has been updating the R 1200 GS with each generation.

And now we have received news via that BMW may be working on a 1250cc Boxer.


You see, the current wasser-Boxer produces 125 bhp of power and 125 Nm of torque but the competition has gone 160 bhp and 140 Nm thereabouts. While BMW owners will tell you that 125 bhp is enough, that is not going to cut it on the spec sheets.

It is also rumoured that the “new” Boxer will include variable valve timing. Along with other changes, it should be good for 140 to 150 bhp.

All this talk started when photos of a new R 1250 RT undergoing road trails surfaced in MCN. Looking at the photo below, you could see that it’s a new bodywork, but what is more telling is the appearance of a new engine.


However, as BMW owners know, if there is a new RT, there is a large likelihood that a GS is also in store. Plus, since the GS is the flagship BMW Motorrad, it will be launched first than the RT.

2019 is just a few months away. Who is waiting with baited breath?


Follow us on Facebook

Follow us on YouTube