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Home » BMW Motorcycle, motorcycle

BMW R1200GS and GS Adventure 2010

Submitted by on March 30, 2012 – 12:13 amNo Comment

Although this year’s updates to the GS aren’t specifically tied to its 30th year in production, BMW bestowed a racy update, so-to-speak, upon the GS’s Boxer-Twin.

New cylinder heads that borrow heavily from the HP2 Sport are the key upgrade for the 2010 GS.

The new heads sport dual overhead cams (the previous GS used a single cam-in-head design) along with a radial valve arrangement that includes larger intake and exhaust valves. Furthermore, the exhaust valves are sodium-filled to better control all the heat exhaust valves experience.

Other updates are new intake manifolds, larger throttle manifolds and new pistons to complement the updated and improved combustion chamber created by the new cylinder heads.

Additional improvements related to the Boxer-Twin include a new muffler with revised internals, and a new electronically controlled exhaust flapper valve that, according to BMW, helps the new GS currently meet upcoming Euro emissions standards for 2012.

The switch to the HP2 Sport’s cylinder heads and other updates listed above are good for 110 peak hp at 7750 rpm, an increase of 5 ponies, and a gain of 3 ft-lbs for 88 ft-lbs at 6000 rpm. Redline has also increased from 8000 to 8500 rpm.

But the slight power gain, says BMW, is only part of the story. More significant than the boost in peak power is a large improvement in low- and mid-range power the new flat-Twin provides.

From roughly 2500 to 5500 rpm the 2010 engine is said to open a sizeable gap in torque compared to the previous mill. According to a BMW-provided dyno chart, the gap appears largest in the 5000-rpm range, but prior to that point the new GS still makes considerably more torque.

The new bike’s power then trades places with the previous bike, dipping in the 5500 to 6000-rpm range where the other bike increased torque. However, the new model picks up again shortly thereafter, cleanly outpacing the old engine all the way to redline.

 

Lastly, subtle new graphics on the analog instrument gauges, an improved dial on the manually adjustable windscreen, and new clutch and brake master cylinders finish off the updates to the 2010 GS and GS Adventure.

Although the new GS looks virtually identical to the previous model, a keen eye will notice the new cylinder heads only employ two valve cover bolts whereas the 2008-09 generation has four bolts. If this doesn’t seem like a particularly splashy way to celebrate the globetrotting GS’s 30th birthday, fear not.

In the coming weeks BMW will unveil a special edition graphics package for all the GS models (F800 and R1200) in celebration of the GS heritage. Sorry, no sneak peeks from us.

otomaps.com source article: www.netcarshow.com www.motorcycle.com www.roushperformance.com

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