Yamaha XJ650 Maxim: review, history, specs

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1980 Yamaha Maxim 650 profile.jpg
Yamaha XJ650
Also called Maxim
Production 1980 - 1986
Class Standard
653cc in-line four, four-stroke
Bore / Stroke 63.0mm x 52.4mm
Compression ratio 9.2:1
Top Speed 122 mph (196 km/h)
Horsepower 73 HP (54.4 KW) @ 9000RPM
Torque 42 lb-ft (57 Nm) @ 7500RPM
Ignition transistorized
Spark Plug NGK BP7ES '80-83
Battery YUASA 12N12A-4A-1 '80-83
Transmission Gear box: 5-speed

Final Drive: shaft drive (cardan)

Clutch: Wet multi-plate
Final Drive Shaft
Suspension Front: 36mm Showa 140mm Wheel Travel, Adjustments For Air Pressure
Rear: Dual Showa Dampers
Brakes Front: single disc
Rear: expanding brake
Front Tire 3.25-19
Rear Tire 120/90-18
Wheelbase 56.89 inches (1445 mm)
Seat Height 30.71 inches (780 mm)
Weight 262.0 kg (wet)
Oil Filter K&N KN-144[1]
Recommended Oil Yamalube 10w-40
Fuel Capacity 5.02 Gallon (19.00 Liters)
Related Yamaha XJ650L
Manuals Service Manual
1980 Yamaha Maxim 650

Introduced in 1980, the XJ650 better known as the Yamaha Maxim 650 was a inline-four, shaft drive that became extremely popular. It was a high performance cruiser that continued the street bike excitement created by the Yamaha Specials. It could reach a top speed of 122 mph (196 km/h). Max torque was 42 lb-ft (57 Nm) @ 7500 RPM. Claimed horsepower was 73 HP (54.4 KW) @ 9000 RPM. It also came in a Turbo variant in the Yamaha XJ650L.

Engine[edit | edit source]

The engine was a air cooled in-line four, four-stroke. A 63.0mm bore x 52.4mm stroke result in a displacement of just 653.0 cubic centimeters. Fuel was supplied via a double overhead cams/twin cam (dohc).

Drive[edit | edit source]

The bike has a 5-speed transmission. Power was moderated via the Wet multi-plate.

Chassis[edit | edit source]

It came with a 3.25-19 front tire and a 130/90-16 rear tire. Stopping was achieved via single disc in the front and a expanding brake in the rear. The front suspension was a 36mm Showa 140mm Wheel Travel, Adjustments For Air Pressure in the 1982 model while the rear was equipped with a Dual Showa Dampers. The XJ650 Turbo was fitted with a 5.02 Gallon (19.00 Liters) fuel tank. The wheelbase was 56.89 inches (1445 mm) long.

Police[edit | edit source]

This bike was very commonly kitted out as a police bike.

1980 - 1985 Yamaha XJ650[edit | edit source]

1980 - 1985 Yamaha XJ 650 1980 - 1985 Yamaha XJ 650 1980 - 1985 Yamaha XJ 650 1980 - 1985 Yamaha XJ 650

Announced for 1980, two versions of the 650 were produced: the sporting Seca for the European market and the Maxim for the U.S. The Maxim featured high bars, a stepped seat, a 17 rear wheel and breathing modifications including Yamaha’s swirl-inducing YICS Yamaha Induction Control System intakes designed to pacify the EP.

In Media[edit | edit source]

References[edit | edit source]

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