The Yamaha YZF-R6 was completely redesigned for the 2003 model year, featuring a new engine, chassis, and bodywork. The second-generation R6 was powered by a completely new liquid-cooled, four-stroke, forward-inclined parallel four-cylinder, 599cc engine. This engine produced 120 horsepower at 14,500 RPM and 57.5 ft-lbs of torque at 12,000 RPM.
The new R6 featured a lightweight aluminum perimeter frame and swingarm, providing a dry weight of just 367 pounds. The suspension consisted of a 43mm inverted fork and a single rear shock, both fully adjustable for preload, compression and rebound damping. The R6 was also equipped with a fully-adjustable steering damper.
Yamaha YZF-R6 Commercial 2003-2005
Model: Yamaha YZF-R6
Engine and Transmission
Displacement: 599.00 ccm (36.55 cubic inches)
Engine type: In-line four, four-stroke
Power: 121.00 HP (88.3 kW)) @ 13000 RPM
Torque: 68.50 Nm (7.0 kgf-m or 50.5 ft.lbs) @ 12000 RPM
Fuel control: Fuel injection
Bore x stroke: 65.5 x 44.5 mm (2.6 x 1.8 inches)
Valves per cylinder: 4
Cooling system: Liquid
The R6 was equipped with a new instrument panel, featuring a digital speedometer, tachometer, coolant temperature, and fuel gauge. The R6 also featured a new LED taillight, and a new exhaust system with a catalytic converter.
In terms of braking, the R6 was equipped with dual 320mm front discs and a 220mm rear disc, with four-piston calipers in the front and a single-piston caliper in the rear. The R6 was also equipped with a new anti-lock braking system (ABS) as an option.
Chassis, Suspension, Brakes and Wheels
2003-2005 Yamaha R6
Front Suspension: 43 mm telescopic fork w/adjustable preload, compression and rebound damping; 120 mm (4.7 in) travel
Rear Suspension: Single shock w/piggyback reservoir and adjustable preload, compression and rebound damping; 4.7″ travel
Front tire: 120/60-ZR17 55W
Rear tire: 180/55-ZR17 73W
Front brakes: Dual disc
Front brakes diameter: Dual 298mm floating discs w/4-piston calipers
Rear brakes: 220mm disc w/ single-piston caliper
Rear brakes diameter: 220 mm (8.7 inches)
Physical measures and capacities
Dry weight: 388 lb (’03) 392 lb (’04)
Power/weight ratio: 0.7469 HP/kg
Seat height: 820 mm (32.3 in)
Overall height: 1,090 mm (42.9 in)
Overall length: 2,020 mm (79.7 in)
Overall width: 690 mm (27.2 inches)
Wheelbase: 1,380 mm (54.3 inches)
Fuel capacity: 17.00 liters (4.49 gallons)
Reserve fuel capacity: 3.50 liters (0.92 gallons)
0 to 60 mph: 2.8 sec.
0 to 1⁄4 mi: 10.80 sec. @ 206.49 km/h (128.31 mph)
Top speed: 157–160 mph
Fuel economy: 38.0–38.1 mpg
The R6 was also equipped with a new fuel injection system, featuring four 38mm throttle bodies, with a 12-hole injector for each cylinder. The R6 was also equipped with a new ignition system, featuring a digital TCI (Transistor Controlled Ignition) with 32-bit ECU (Engine Control Unit).
Overall, the Yamaha YZF-R6 2003-2005 (Second Generation) was a significant upgrade over the previous generation, featuring a new engine, chassis, and bodywork, providing improved performance, handling, and aerodynamics.
If you never let the YZF-R6’s tachometer needle roam into the second half of its arc, you might never know what’s lurking there waiting to be unleashed. And… there’s even more for 2004.
An ingenious suction-piston fuel injection system (re-mapped for ’04), among other things, endows it with amazingly good road manners at low and medium engine speeds. But we had a higher calling in mind for the little beast that won the AMA Supersport Class Championship** right out of the gate as well as Cycle World, Sport Rider and Motorcycle Online 600 comparisons.*
A 15,500 rpm redline. Redesigned exhaust canister providing improved exhaust flow for 2004. This one is pure sportbike, designed from the asphalt up to achieve a delicate, sublime blend of handling and horsepower, finesse and feel, hyperactive agility and laser-beam predictability.
Absolute leading-edge technology takes tangible form in the R6’s light and rigid DeltaBox III frame – an almost seamless piece of alloy artisanship that allowed the engineers to put strength – and the revvy 4-cylinder – exactly where they belong. From there, all sorts of good things flow.
We put all our experience into this one; the harder you ride it, the more you’ll extract.
Manufacturer’s Sugg. Retail Price…$8,099 ~ $8,199* .