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 Yamaha - XJ S / N Diversion
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Yamaha D2-492-06-04
Photo ou archives : F-M. Dumas

Capacity : 600
Model : XJ S / N Diversion
Production : 1991 - 1998
Category : (R) Street Bike


XJ600S  Seca II (US), Diversion (EU) - 1991

A safe choice


Having struggled against each other in a bizarre quest for ultra sophistication, the Japanese manufacturers have rediscovered the importance of making bikes that are both simple and affordable. Among the latest on the scene is the Yamaha Seca, which went on the market at the end of 1991 at a seemingly unbeatable price.


Omitting the Frills

About 30 percent less expensive than rival 600cc four-cylinder "Super Sport" bikes, the Seca II (named Diversion for Europe) is still not a cheapskate machine. It just omits unnecessary features and complex technology. There is no integral fairing, no cast- aluminum frame, no liquid cooling, no multivalve head. That doesn't prevent the Seca from being up-to-date with an entirely new power unit, forward- inclined in a modem tubular frame to improve the weight distribution.


A Multipurpose Road Bike

Even though its maximum speed is a perfectly respectable 120 mph or so, the Seca is not predominantly an out-and-out performance machine. It is basically a highly practical bike that calls for a minimum of maintenance, is light and easy to handle, and just as comfortable two-up as solo. It happily meets its design parameters in being that rare animal - a multi-purpose road machine. Its styling is just right for its function, sporting without being aggressive, modern without aping racing bikes or copying the classics of the past.



Engine: 598cc (58.5x55.7mm) four-cylinder four-stroke

Power output: 61 hp @ 8500 rpm

Valves: twin overhead camshafts, 2 valves per cylinder

Fuel system quadruple carburetors

Transmission: 6-speed gearbox: chain final drive

Suspension: (front) telescopic fork; (rear) swinging fork with single damper

Brakes: (front) disc; (rear) disc

Wheels: cast alloy; (front) 110/80x17 in; (rear) 130/70x18 in

Weight: 400 lb.

Maximum speed 118 mph


Reasonably priced and endowed with outstanding qualities, the Yamaha Seca represents a new beginning for simple, all-purpose motorbikes.”


Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

  • Original cards on paper (in french)
  • High resolution scans or original documents presented and signed with my name.

Please contact me at for conditions and copyright.

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François-Marie Dumas

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