Of course, this new FI is only a fraction of the new platform. The completely redesigned 449cc liquid-cooled Single has been "compacted," to say the least. Height, width and weight have all been reduced. To achieve this, many items were changed, among them the connecting rod, which was shortened 3.5mm, which in turn allowed a shorter cylinder. There are even little flat spots on the bottom of the crank counterweights so when the lighter, redesigned piston reaches Bottom Dead Center, its skirt clears. Similar shrinking treatment was given to the cylinder head, with the cam running in the head directly rather than on a bolt-in mount. Also, the valvetrain is altered to mimic that of the CRF150R, with a four-lobe cam and split twin rockers on the exhaust for a more compact layout. Even the transmission was narrowed (but maintains the same ratios).