Yamaha XJ650 Maxim

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Yamaha XJ650 Maxim
1982 XJ 650 Maxim left side view sport tourer
1982 Yamaha XJ650 Maxim,XJ650RJ Seca (Made only in 1982)
Manufacturer Yamaha
Also called Maxim 650
Parent company Yamaha Corporation
Production 1980-1983
Predecessor Yamaha XS 650 Special
Class Sport/Cruiser
Engine 653 cc air-cooled four-stroke inline-4, DOHC, 2 valves per cylinder
Bore / stroke 63 х 52.4 mm
Compression ratio 9.2:1
Top speed 128 mp/h
Power 71 hp (51.8 KW) @ 9400 rpm
Torque 42 ft. lbs (57 NM) @ 7200 rpm
Ignition type transistorized
Transmission 5-speed
Frame type tubular steel
Suspension Front: 36 mm Air assisted telescopic forks, 147 mm wheel travel
Rear:5-way adjustable spring preload, 97 mm wheel travel
Brakes Front: Single 300 mm disc
Rear: drum
Tires Front: 3.25-H19
Seat height 29.3 inches
Weight 453 lb (205 kg) (dry)
Fuel capacity 13 liters/3.4 gal
Related Yamaha 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 through 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.



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]


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]


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

External links[edit]