Yamaha XJ650 Maxim: review, history, specs

**Yamaha XJ650**
Manufacturer	Yamaha
Also called	Maxim
Production	1980 - 1986
Class	Standard
Engine	653cc in-line four, four-stroke
Bore / Stroke	63.0mm x 52.4mm
Compression ratio	8.2:1
Top speed	126 mph (203 km/h)
Horse Power	88.11 HP (65.7 KW) @ 9000RPM
Torque	60.48 ft/lbs (82.0 Nm) @ 7000RPM
Ignition type	transistorized
Sparkplug	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 ;
Suspension	Front: 36mm Showa 140mm Wheel Travel, Adjustments For Air Pressure ; Rear: Dual Showa Dampers
Brakes	Front: dual 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	(dry), 262.0 kg (wet)
Fuel capacity	5.02 Gallon (19.00 Liters)
Manuals	Service Manual
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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 126 mph (203 km/h). Max torque was 60.48 ft/lbs (82.0 Nm) @ 7000 RPM. Claimed horsepower was 88.11 HP (65.7 KW) @ 9000 RPM.

Engine

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

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

Chassis

It came with a 3.25-19 front tire and a 120/90-18 rear tire. Stopping was achieved via dual 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 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

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

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.

1981 - 1983 Yamaha XJ 650 Turbo

My XJ 650 Turbo draw attention at Tokyo Motor Show in 1981. The XJ 650 Turbo, the flashiest of the group, was the simplest, with pressurized carburetors instead of the fuel injection and without the single shock rear suspension the others boasted.

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