Yamaha XJ650 Maxim

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Yamaha XJ650 Maxim
1982 XJ 650 Maxim left side view sport tourer
1982 Yamaha XJ650 Maxim,XJ650RJ Seca (Made only in 1982)
ManufacturerYamaha Motor Company
Also calledMaxim 650
Parent companyYamaha Corporation
Production1980-1983
PredecessorYamaha XS 650 Special
ClassSport/Cruiser
Engine653 cc air-cooled four-stroke inline-4, DOHC, 2 valves per cylinder
Bore / stroke63 х 52.4 mm
Compression ratio9.2:1
Top speed128 mp/h
Power71 hp (51.8 KW) @ 9400 rpm
Torque42 ft. lbs (57 MN) @ 7200 rpm
Ignition typetransistorized
Transmission5-speed
Frame typetubular steel
SuspensionFront: 36 mm Air assisted telescopic forks, 147 mm wheel travel
Rear:5-way adjustable spring preload, 97 mm wheel travel
BrakesFront: Single 300 mm disc
Rear: drum
TiresFront: 325-H19
Rear:130/90-H16
Seat height29.3 inches
Weight453 lb (205 kg) (dry)
Fuel capacity13 liters/3.4 gal
RelatedYamaha XJ750 Maxim
 
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Yamaha XJ650 Maxim
1982 XJ 650 Maxim left side view sport tourer
1982 Yamaha XJ650 Maxim,XJ650RJ Seca (Made only in 1982)
ManufacturerYamaha Motor Company
Also calledMaxim 650
Parent companyYamaha Corporation
Production1980-1983
PredecessorYamaha XS 650 Special
ClassSport/Cruiser
Engine653 cc air-cooled four-stroke inline-4, DOHC, 2 valves per cylinder
Bore / stroke63 х 52.4 mm
Compression ratio9.2:1
Top speed128 mp/h
Power71 hp (51.8 KW) @ 9400 rpm
Torque42 ft. lbs (57 MN) @ 7200 rpm
Ignition typetransistorized
Transmission5-speed
Frame typetubular steel
SuspensionFront: 36 mm Air assisted telescopic forks, 147 mm wheel travel
Rear:5-way adjustable spring preload, 97 mm wheel travel
BrakesFront: Single 300 mm disc
Rear: drum
TiresFront: 325-H19
Rear:130/90-H16
Seat height29.3 inches
Weight453 lb (205 kg) (dry)
Fuel capacity13 liters/3.4 gal
RelatedYamaha XJ750 Maxim

The Yamaha XJ650 Maxim is a mid-size motorcycle by the Yamaha Motor Company introduced in 1980 as the Maxim I and produced thru 1983. Yamaha designed the high-performance XJ650 as a brand-new four-cylinder with shaft drive, and built it specifically as a special cruiser. The XJ Maxim was the successor of the XS Special introduced in 1978.

History[edit]

Overview[edit]

1980 Yamaha XJ650 Maxim I

The 4 cylinder, air-cooled, twin-cam 650cc engine is housed in a cross-braced duplex steel tube frame. Yamaha made the engine narrower by locating the alternator behind the cylinder block and above the gearbox rather than on the end of the crankshaft. The Maxim had shaft drive.[1] Contemporary reports praised the Maxim's performance and braking. Criticism was aimed at engine vibration and under-damped suspension. Succeeding Maxim models were refinements; the 1982 Maxim 650 had a more comfortable handlebar, an air-adjustable fork, and a more luxurious seat. A turbocharged variant, the XJ650 Seca Turbo, was featured in the 1983 James Bond film Never Say Never Again.

Cycle magazine said in 1982 "Three years later, after the wide proliferation of special styling, it's easy to forget what a landmark bike the Maxim was...The 650 was striking, controversial, sensational, and wildly successful in showrooms. Other companies have produced bodacious knock-offs of the 650 Maxim, imitations that suffer from excess. It's too bad the Maxim was obscured when manufacturers blanketed the market with cruisers. A decade down the road, the Maxim may well be a genuine classic of the 1980s — a bright idea that stood the test of time."[2]

Engine/Drivetrain[edit]

Yamaha 653 cc DOHC-8 valves, inline-4
Yamaha shaft drive

The 1980 to 1983 XJ650 Maxim combined an air-cooled, 653 cc DOHC two valves per cylinder transverse inline-four engine and shaft drive. The engine employed a one-piece crankshaft with plain bearings and placed the alternator and starter behind the engine to minimize width. A chain drives the two overhead camshafts, which used shim-and-bucket adjustment. A second chain drives the oil pump located in the crankcase, while a third (Hy-Vo) chain spins the alternator. The power unit is fed by four Hitachi constant velocity carburetors and lit by electronic ignition. Four-into-two headers extracts the waste gases, which exit through two shortened mufflers. Hypoid gears and a shaft turns the rear wheel, with the shaft housing forming the left side swingarm.

See also[edit]

References[edit]

  1. ^ Cycle, 1982
  2. ^ Quote-Cycle, 1982

External links[edit]