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Yamaha  XJ 650 Midnight Maxim  Standard Engine Specifications

Make Yamaha Model XJ 650 Midnight Maxim
Year 1982 Engine Air-cooled four stroke, transverse four cylinder, DOHC, 2 valves per cylinder,
Displacement Cubic Inches 39.8485048973 Displacement CC 653
Bore x Stroke 63 x 52.4 mm Compression Ratio 9.2:1
1982 Yamaha XJ 650 Midnight Maxim



Motorcycle Engines - Definations Explained

Displacement: Displacement is the volume displaced in the cylinders of an engine as the pistons move from their bottom position (BDC) to their highest position in the cylinders (TDC). Displacement is measured in either cubic centimeters or cubic inches.

Bore and Stroke: Bore is the diameter of the cylinder inwhich the piston moves up and down. Stroke is the total distance that the piston moves up and down inside the cylinder.


1982 Yamaha XJ 650 Midnight Maxim Standard Specifications


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