These are the known mechanical and performance specifications for your 1986 Yamaha XJ700XS.
Basic Specs

Engine
Displacement697.30 ccm (42.55 cubic inches)
Type
DetailsIn-line four, four-stroke
Max RPM10000
Compression11.2:1
Bore/Stroke68.0 x 48.0 mm (2.7 x 1.9 inches)
Valves/Cylinder5
FuelingCarburettor. (4) Standard side-draft 33 mm Mikuni CV
IgnitionTCI
Exhaust
LubricationWet Sump
CoolingLiquid
Drivetrain
Gearbox5-speed
Final DriveShaft drive (cardan)
ClutchWet/multi-disc
Driveline
Performance
Horespower86.00 HP (62.8 kW)
Torque67.66 Nm (6.9 kgf-m or 49.9 ft.lbs)
Top Speed
Fuel Economy & Polution
Fuel Consumption5.70 litres/100 km (17.5 km/l or 41.27 mpg)
Fuel Capacity13.00 litres (3.43 gallons)
Emissions132.2 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeDouble Cradle
Rake31.5°
Trail120 mm (4.7 inches)
Front SuspensionTelescopic fork
Front Travel150 mm (5.9 inches)
Rear SuspensionSwing arm w/ coil springs
Rear Travel99 mm (3.9 inches)
Seat
Seat Height760 mm (29.9 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,160 mm (45.7 inches)
Total Length2,235 mm (88.0 inches)
Total Width775 mm (30.5 inches)
Ground Clearance145 mm (5.7 inches)
Wheelbase1,520 mm (59.8 inches)
Dry Weight215.0 kg (474.0 pounds)
Wet Weight232.0 kg (511.5 pounds)
Wheels & Brakes
Front Tire/Tyre100/90-19
Rear Tire/Tyre130/90-16
Front BrakesDouble disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
Wheels
Comments