2004 YAMAHA YZF-R1, With the competition advancing, Yamaha took to a major development. This included style updates like an underseat twin exhaust, and performance upgrades including radial brakes and for the first time on an R1 Ram-air intake. Furthermore, the wheelie-tendency known from earlier productions is drastically reduced by changing frame geometry and weight properties. The all new engine (no longer used as a stressed member of the chassis) featured a separate top crankcase and cylinder block. The 2004 R1 produces a stated 172 hp (128 kW) at the crankshaft (excluding ram air,180 hp (130 kW) with ram air) and also weighs 172 kilograms (dry). The conventional front brake calipers were replaced by radially-mounted calipers, activated by a radial master cylinder. *Do Not Call*Demo Bike*Demo Account*Do Not Call*Bike Not For Sale*Not a Dealer*