BMW's four-cylinder K-bikes all receive a new larger 1293cc engine (from the previous 1157cc), with the 136cc displacement boost achieved via a 1mm bore increase and additional 5.3mm stroke. Connecting rods that are nine grams lighter work with 12-gram-lighter pistons and revised cam timing to give an extra 8.0 horsepower (for a claimed total of 175 at the crank) at 9250 rpm-1000 rpm lower than the 1200-and 7.4 ft-lb more torque (now 103 ft-lb) over the old engine. Also assisting in this area is a redesigned exhaust system utilizing a significantly shorter muffler and an exhaust valve in the collector; weight for the stainless steel unit has dropped from 22.9 pounds to 20.7 pounds, complete with catalytic converter.
Interesting options include the same power-shifter and 2D instrument cluster setup found on the HP2 boxer twin, and an "anti-spin control" system integrated into the standard ABS setup.
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