The Last Samurai: 1965 Kawasaki SG250

By Dain Gingerelli
Published on April 11, 2017
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by Dain Gingerelli
1965 Kawasaki SG250

1965 Kawasaki SG250

  • Engine: 248cc air-cooled OHV single, 66mm x 72.6mm bore and stroke, 8.7:1 compression ratio, 18hp @ 7,000rpm (claimed)
  • Top speed: 78mph (claimed)
  • Carburetion: Single Mikuni with tickler
  • Transmission: 4-speed w/rotary shift pattern, chain final drive
  • Electrics: 12v, coil and breaker points ignition
  • Frame/wheelbase: Single downtube steel cradle/53.5 inches (1,359mm)
  • Suspension: Telescopic forks front, dual shocks w/adjustable preload rear
  • Brakes: 7-3/4in (197mm) SLS drum front and rear
  • Tires: 2.75 x 18in front, 3 x 18in rear
  • Weight (dry): 364lb (164kg)
  • Seat height: 32in (813mm)
  • Fuel capacity: 3.2gal (14.6ltr)
  • Price then/now: NA/$4,500-$7,500

Try to pinpoint the greatest Kawasaki 4-stroke motorcycle to ever roll on American pavement, and you’d be hard pressed to name just one model. But you couldn’t blame diehards from the 1970s for suggesting that we give the nod to the fabled Z1, the inline four-banger that, in 1973, elevated the Superbike game to a whole new level.

Enthusiasts today might say “no way,” insisting that we leap-frog back to the present, touting the 2016 Ninja H2R with its rollicking 326-supercharged-horsepower engine as the top 4-stroker from the Big K. Calmer heads might point us back in time, say to 1966, so they could coolly explain that the W1 and its 624cc vertical-twin 4-stroke engine was the bike responsible for setting the company’s 4-cycle movement into motion in the first place here in America.

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