n many ways, the 2004-2006 Yamaha YZF-R1 is a bit of a contradiction. Why? When it was unveiled in 2004, this generation of R1 was claimed to be the first motorcycle to boast a 1:1 power-to-weight ratio, with Yamaha boldly stating that it weighed 172kg and produced 172bhp. Obviously, both figures were more than a little optimistic with the dry weight measured (presumably…) with all fluids, battery, tyres and so on removed to minimise it as much as possible and the power tested at the sparkplug, not the rear wheel,
