Some of that weight loss comes from simplified bodywork, reduced from 40 to 32 pieces for a savings of 7.5 lbs. Frame geometry is unchanged, but fewer frame sections that are thinner in places cut another 3 lbs. Smaller axles, an improved shock with more aluminum and fewer steel parts, and other small hardware upgrades slash even more weight. The engine architecture is likewise unchanged, but lighter pistons and rods shave precious grams, as does a new exhaust system said to drop 3.75 lbs. Claimed output remains the same at 123 horsepower for the 600cc and 140 bhp for the 750cc, with improved fuel economy and reduced emissions, too. A simplified S-DMS interface, now with two drive modes instead of three, allows the ECU to be downsized and relocated in front of the airbox.