Yamaha XJ600 Seca II

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Yamaha XJ600 Seca II
Manufacturer
Production 1992 - 98
Class Standard
Engine
Four stroke, inline 4 cylinder, DOHC, 8 valve
Compression ratio 10.0:1
Top Speed 182 km/h / 113 mph
Air Filter K&N YA-6092 `92-99[1]
Ignition Electronic
Transmission 6 Speed
Frame Tubular cradle
Suspension Front: Telescopic fork
Rear: Monoshock
Brakes Front: Single disc
Rear: Single disc
Front Tire 100/80-17, Yokohama F-209
Rear Tire 130/70-18, Yokohama R-209
Wheelbase 1460 mm / 57.5 in
Seat Height 777 mm / 30.6 in
Weight 191 kg / 422 lbs (dry), 204 kg / 450 lbs (wet)
Recommended Oil Yamalube 10w-40
Fuel Capacity 17.4 Liters / 4.6 US gal
Manuals Service Manual


It could reach a top speed of 182 km/h / 113 mph.

Engine[edit | edit source]

The engine was a Air cooled cooled Four stroke, inline 4 cylinder, DOHC, 8 valve. The engine featured a 10.0:1 compression ratio.

Drive[edit | edit source]

Power was moderated via the Wet, Multiple discs.

Chassis[edit | edit source]

It came with a 100/80-17, Yokohama F-209 front tire and a 130/70-18, Yokohama R-209 rear tire. Stopping was achieved via Single disc in the front and a Single disc in the rear. The front suspension was a Telescopic fork while the rear was equipped with a Monoshock. The XJ600 Seca II was fitted with a 17.4 Liters / 4.6 US gal fuel tank. The bike weighed just 191 kg / 422 lbs. The wheelbase was 1460 mm / 57.5 in long.

Photos[edit | edit source]

Yamaha XJ600 Seca II Yamaha XJ600 Seca II Yamaha XJ600 Seca II

Overview[edit | edit source]

Yamaha XJ 600 Seca II











The Seca II combines some of the best features of its rivals: a half-fairing like the Kawasaki EX500's. styling resembling the Suzuki Bandit's, and an air-cooled, two-valve-per-cylinder motor that is easy to work on like the Suzuki GSSOOE's.

But Yamaha went one step better. Where its competition uses 400cc inline-Four or 500cc parallel-Twin engines, the Seca boasts a 600cc inline-Four. That displacement advantage becomes apparent the moment you thumb the starter button. At low rpm, its twin mufflers emit a throaty growl that sounds like that of a literbike or a small sportcar. Our production test bike liked a lot of choke in the morning, but once it was warm it ran fine: there was not a hint of carburetion glitches.

Power delivery is linear all the way to its 9500-rpm redline. with the strongest midrange and top end of these four. The engine is a tad buzzy at low and high rpm. but calms down at highway cruising speeds - 65 mph translates to 5000 rpm in sixth gear. That vibration mav have contributed to the one minor problem we had with our Seca: The ignition switch came adrift. Buyers would do well to make sure the two bolts securing it are light.

Cruising is made comfortable by the riding position, roomy even for six-footers, with a broad, softly padded seat and a wide tubular handlebar. The stylish half-fairing with slotted windscreen deflects wind off the rider's torso, with little buffeting at helmet level. Footpegs are low offering plenty of leg-room yet only slightly compromising cornering clearance.

The Seca's motor is rubber-isolated at two of its four mounting points, providing a compromise of vibration control and rigidity. Exhaust headers crisscross to match the engine's firing order for optimal gas-flow. Cam and crankcase covers are "streamlined" for better cooling.

Suspension at both ends is compliant, but the rear shock spring could be stiffer - even our lightest tester liked the spring-preload cranked all the way up. Heavier riders or those who carry a passenger—something you'll be tempted to do with the Seca's expansive passenger perch and padded grabrails—may desire a stiffer shock spring.

Single disc brakes at both ends offer plenty of stopping power, provided you give the span-adjustable front brake lever a healthy tug. The 110/80-17 front and 130/70-18 rear Yokohama bias-ply tires provide good traction, though we felt the front tire's profile contributed toward making the Seca the heaviest-steering bike of the bunch. Still, its Superbike-style handlebar gives the rider lots of leverage, and at 422 pounds dry the Seca is easily flicked from side to side.

Owners won't outgrow it in a year. It's also arguably the best looking, combining modern bodywork with an elemental tubular chassis and an attractive, exposed engine.


Make Model Yamaha XJ 600 Seca II
Year 1992 - 98
Engine Type Four stroke, inline 4 cylinder, DOHC, 8 valve
Displacement 599 cc / 36.6 cub in.
Bore X Stroke 58.5 x 55.7 mm
Compression 10.0:1
Cooling System Air cooled
Lubrication Wet sump
Exhaust 4-into-2
Induction 4 x 28mm Mikuni BDST (BDS26) down-draft carburetors
Ignition Electronic
Starting Electric
Max Power 45.4 hp/ kW / 61 hp @ 8500 rpm
Max Torque 53 Nm / 39.1 lb-ft @ 6300 rpm
Clutch Wet, Multiple discs
Transmission 6 Speed
Final Drive Chain
Frame Tubular cradle
Front Suspension Telescopic fork
Front Wheel Travel 140 mm / 5.5 in.
Rear Suspension Monoshock
Rear Wheel Travel 109 mm / 4.3 in.
Front Brakes Single disc
Rear Brakes Single disc
Front Tire 100/80-17, Yokohama F-209
Rear Tire 130/70-18, Yokohama R-209
Rake 25°
Trail 96.5 mm / 3.8 in.
Dimensions Length 2095.5 mm / 82.5 in Width 749 mm / 29.5 in Height 1171 mm / 46.1 in
Wheelbase 1460 mm / 57.5 in
Seat Height 777 mm / 30.6 in
Dry Weight 191 kg / 422 lbs
Wet Weight 204 kg / 450 lbs
Gvwr 397 kg / 875 lbs
Load Capacity (full Tank) 193 kg / 425 lbs
Fuel Capacity 17.4 Liters / 4.6 US gal
Consumption Average 5.0 L/100 km / 20 km/l / 47 mpg
Braking: 48 Km/h / 30 Mph - 0 9.1 m / 30 ft
Braking: 97 Km/h / 60 Mph - 0 37.8 m / 124 ft
Standing ¼ Mile 13.07 sec / 161.5 km/h / 100.33 mph
Acc: 0 - 97 Km/h / 60 Mph 4.2 sec
Acc: 64 - 97 Km/h / 40 - 60 Mph 4.7 sec
Acc: 97 - 129 Km/h / 60 - 80 Mph 5.4 sec
Top Speed 182 km/h / 113 mph

References[edit | edit source]

  1. 2019 K&L Supply Co Catalog. K&L Supply Co. 2019.