Yamaha's design team reshaped the Genesis inline-four engine for the R1 by elevating the gearbox input shaft and placing the output shaft beneath it — a stacked gearbox layout that made the engine significantly shorter front-to-back. This allowed the wheelbase to be reduced to 1,385 mm while still providing a long swingarm, optimising weight distribution. Four 40 mm Keihin CV carburetors fed the engine, and the exhaust used Yamaha's EXUP valve system to manage exhaust gas flow across the rev range. Independent tests recorded a 0–60 mph time of under 3 seconds and a quarter-mile pass of around 10.19 seconds at over 131 mph in 1998 specification.
The 2000 revision reduced dry weight and refined the engine management for a broader power distribution, while the bodywork received aerodynamic tweaks including a reshaped windscreen and sharpened headlight housing. For 2002, fuel injection replaced the carburetors and Yamaha introduced a new hydroformed Deltabox frame, improving rigidity by 30%. The 2004 model brought a fully new engine — no longer used as a stressed chassis member — along with radially mounted front brake calipers, a ram-air intake system, and a factory steering damper. Dry weight dropped to 172 kg.
A 2006 limited edition celebrating Yamaha's 50th anniversary featured Öhlins suspension developed alongside the YZR-M1 MotoGP machine and forged Marchesini wheels, with production capped at 500 units for the United States and 500 for Europe.
The 2007 redesign replaced the five-valve Genesis cylinder head with a more conventional four-valve layout and added fly-by-wire throttle through Yamaha Chip Control Throttle (YCC-T), electronic variable-length intake funnels via YCC-I, and an all-new Deltabox frame with six-piston radial front brake calipers.
The most technically distinctive R1 arrived for 2009, when Yamaha adapted crossplane crankshaft technology from the YZR-M1 MotoGP bike. This firing order — 270°, 180°, 90°, 180° — produces torque pulses similar to a 90-degree V4, eliminating the inertial torque surges inherent in conventional inline-four cranks and giving the rider more progressive, controllable rear traction. Yamaha marketed this as providing the feel of two engines: the low-end torque character of a twin with the top-end pace of an inline-four. The 2009 model also introduced a three-mode throttle mapping system (D-Mode) to suit varying road and track conditions, and an electronic steering damper.
Traction control was added in 2012, and a 50th Anniversary special edition was produced in MotoGP-inspired livery, limited to 2,000 units.
For 2015, Yamaha launched a comprehensively redesigned R1 drawing heavily on contemporary M1 MotoGP architecture. The electronics suite was the most extensive ever fitted to a production motorcycle at launch, encompassing traction control, slide control (a first for any production bike), anti-wheelie lift control, launch control, linked ABS, and a quick-shift system. Data from a six-axis inertial measurement unit was processed over 100 times per second to inform intervention strategies. A thin-film TFT instrument display was customisable by the rider.
Alongside the standard R1, Yamaha offered the R1M as a higher-specification variant with semi-active Öhlins electronic suspension, carbon fibre bodywork, a Communication Control Unit for data logging via the Y-TRAC system, and Bridgestone tires in a wider 200/55 rear size. From 2016, a lower-specification R1S variant was also available.
The R1 won the Macau Grand Prix five times between 1999 and 2013. In 2005, John McGuinness took victory in both the Senior TT and the inaugural Superbike TT at the Isle of Man aboard a Yamaha R1. Lorenzo Alfonsi won the 2004 FIM Superstock 1000 Cup, followed by Didier Van Keymeulen in 2005.
Ben Spies won the 2009 Superbike World Championship title on an R1, recording 14 victories and 11 pole positions in a single dominant season. Toprak Razgatlioglu claimed the 2021 World Superbike title on the same platform with 13 wins. In British Superbikes, Tommy Hill won the 2011 title and Josh Brookes took the 2015 championship on R1 machinery.
At the Suzuka 8 Hours, the Yamaha Factory Racing Team was victorious in 2015, 2016, 2017, and 2018, with Katsuyuki Nakasuga anchoring the squad across all four winning years alongside teammates including Pol Espargaro, Alex Lowes, Bradley Smith, and Michael van der Mark.