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It is finally official. BMW Motorrad has updated its sole boxer-twin engine, in the process revealing the R1250 GS and R1250 RT.

Laying months and months’ worth of speculation to rest, BMW Motorrad has finally revealed the new updated Boxer-powered twins. The new R1250 GS and R1250 RT feature an increase in displacement, new paint schemes, and most significantly the new variable cam technology.

BMW Motorrad got the formula of the GS right the first time, so it made no sense to tamper with it for fear of losing the bike’s present capability and appeal. After all, the GS is the father of the adventure bike segment. The new R1250 GS is not hugely different from the outgoing R1200. The difference can be seen inscribed on the engine, which reads ShiftCam.

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The new R1250 GS HP in action.

BMW explains that “the ShiftCam enables variation of the valve timings and valve stroke on the intake side. In addition, the intake camshafts are designed for asynchronous opening of the two intake valves, resulting in enhanced swirl of the fresh, incoming mixture and therefore more effective combustion. Other technical changes to the engine relate to the camshaft drive – now taken care of by a toothed chain (previously a roller chain) – an optimised oil supply, twin-jet injection valves, and a new exhaust system”.

The ShiftCam technology bestows the new R1250 GS and R1250 RT with increased power and torque: 136hp at 7,750rpm and 143Nm at 7,750rpm. You have 125Nm torque at your disposal at 6,500rpm, 110Nm from 2,000rpm, and 120Nm from 3,500rpm thanks to ShiftCam.

BMW Motorrad also increased the displacement of the boxer-twin engine from 1170cc in the R1200 GS to 1254cc. This is where the mechanical updates end. The GS gets a new HP color theme that includes golden rims with spokes, white frame, rallye seat, short windscreen, and optional longer-travel suspension for hardcore off-road performance. People who prefer tarmac touring to dirt bashing can go for the Exclusive version which gets cast alloy wheels in place of the spoked rims of the GS HP. The R1250 RT gets a Spezial color scheme which was initially available on the K1600 GTL.

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Both the GS and RT get the new ShiftCam variable valve technology.

BMW has given the two bikes an exhaustive suite of electronics, with an additional Dynamic Pro mode thrown in. There is also a new feature called Dynamic Brake Control which basically improves braking by eliminating unintentional throttle activation during braking. Hill hold assist is now standard. The GS also gets an all-LED headlamp as standard. The new BMW R1250 GS weighs 249kg fully fueled, while the R1250 RT weighs in at 279kg.