Yamaha FZR600 (1991)

The Yamaha FZR 600 motorcycle was produced in 1991 and featured a four-stroke, transverse, four-cylinder engine capable of 91 horsepower at 10,500 RPM and 6.7 kgf-m or 48.4 lb-ft of torque at 8,500 RPM. Equipped with 4-valves per cylinder, a 599 cc or 36.6 cu. in engine capacity, and a compression ratio of 12.0:1, the bike could reach a top speed of 237.1 km/h or 147 mph.

A constant mesh six-speed transmission with a wet, multi-disc clutch and an o-ring chain final drive powered the FZR 600. The primary reduction ratio was 82/48 (1.708), and the secondary reduction ratio was 45/15 (3.000). The bike’s frame was a double cradle design, and the front suspension featured a 41mm telescopic fork that was preload adjustable. The rear suspension was a rising-rate monoshock that was preload and rebound adjustable.

Stopping power was provided by two 298mm discs with two-piston calipers on the front and a single 214mm disc with a one-piston caliper on the rear. The bike’s dimensions included a length of 2095mm, a width of 700mm, and a height of 1155mm. The wheelbase measured 1425mm, and the ground clearance was 135 mm or 5.3 in.

The Yamaha FZR 600 had a fuel capacity of 18 liters, and its fuel economy was 5.3 liters/100km, 18.7 km/l, or 43 mpg. Other features of the bike included a transistor-controlled digital ignition, 4 x 38mm Mikuni BDST32 induction, and a wet sump lubrication system. Reviewers at The FZR Archives praised the bike’s handling and top speed capabilities.

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Technical specifications:

Make Model: Yamaha FZR 600

Year: 1991

Engine: Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.

Capacity: 599 cc / 36.6 cub in

Bore x Stroke: 59 x 54.8 mm

Compression Ratio: 12.0:1

Cooling System: Liquid cooled

Lubrication: Wet sump

Induction: 4 x 38mm Mikuni BDST32

Ignition: Transistor controlled digital

Sparkplug: Type/manufacturer – CR9E or CR8E/NGK – U27ESR-N or U24ESR-N/NIPPONDENSO

Sparkplug Gap: 0.7 ~ 0.8 mm (0.028 ~ 0.031 in)

Generator: AC magneto generator

Battery: GM12AZ/12v 12AH

Electrics: Headlight type – Quartz bulbBulb wattage/quantity Headlight – 12V 35W/35W x 2 Tail/brake light – 12V 8W/27W x 2 Front flasher/running light – 12V 27W/8W x 2 Rear flasher light – 12V 27W x 2 Meter light – 12V 1.7 x 4 Neutral indicator light – 12V 3.4V x 1 High beam indicator light – 12V 3.4V x 1 Oil level indicator light – 12V 3.4V x 1 Turn indicator light – 12V 3.4V x 1

Starting: Electric

Max power: 66.3 kW / 91 hp @ 10500 rpm

Max Torque: 65.7 Nm / 6.7 kgf-m / 48.4 lb-ft @ 8500 rpm

Clutch: Wet, multi-disc

Transmission: 6 speed

Transmission Type: Constant mesh 6-speed

Final Drive: O-ring chain, 530 size, 106 links

Primary reduction system: Spur gear

Primary reduction ratio: 82/48 (1.708)

Secondary reduction ratio: 45/15 (3.000)

Gear Ratio: 1st – 37/13 (2.846) 2nd – 37/19 (1.947) 3rd – 31/20 (1.550) 4th – 28/21 (1.333) 5th -31/26 (1.192) 6th – 30/27 (1.111):1

Frame: Double cradle

Front Suspension: 41mm Telescopic fork preload adjustable, Coil spring, oil damper

Front Wheel Travel: 130 mm / 5.1 in

Rear Suspension: Rising-rate Monoshock preload and rebound adjustable, Gas, coil spring, oil damper

Rear Wheel Travel: 115 mm / 4.5 in

Front Brakes: 2 x 298mm discs, 2 piston calipers

Rear Brakes: Single 214mm disc, 1 piston caliper

Front Tyre: 110/70-17

Rear Tyre: 130/70-17

Rake: 25 degrees

Trail: 94 mm / 3.7 in

Dimensions: Length 2095 mm / 82.5 in Width 700 mm / 27.6 in Height 1155 mm / 45.5 in

Wheelbase: 1425 mm / 56.1 in

Ground Clearance: 135 mm / 5.3 in

Dry Weight: 195 kg / 430 lbs

Wet Weight: 208 kg / 458 lbs

Fuel Capacity: 18 Litres / 4.8 gal

Reserve: 3.4 Litres / 0.9 gal

Consumption Average: 5.3 L/100 km / 18.7 km/l / 43 mpg

Braking 60 km/h / 37 mph – 0: 13.3 m / 43.8 ft

Braking 100 km/h / 62 mph – 0: 36.88m / 121 ft

Standing 1/4 Mile: 11.4 sec / 189.0 km/h / 117 mph

Top Speed: 237.1 km/h / 147 mph

Reviews: The FZR Archives