1973 EXT 650 Specifications

 
  • Engine

    • Model: T8A650RX-1 Kawasaki
    Cylinders: 3
    Displacement: 644 cc
    Bore: 67.5 mm
    Stroke: 60 mm
    Horsepower: 100 +
    Compression Ratio: 7.4:1 Effective
    Peak HP R.P.M.: 8500
    Piston Clearance: 0.0048 inch max
    Ring End Gap: 0.008 - 0.014 inch
    Timing: Timing Mark on Crankcase
    Ignition Type: CD
    Lighting Coil Voltage/Wattage: 12 Volt/35 Watt
    Spark Plug: NGK B10EV
    Plug Gap: 0.012 - 0.016 inch
    Carburetor: Mikuni VM40
    Fuel Mixture Ratio: 20:1
    Cylinder Head Torque: 16 ft. lbs.
    Crankcase Torque: 16 ft. lbs.
    Flywheel Torque: 60 ft. lbs.
    Maximum Engine Operating Temp: 425 degrees
     
  • Drive Pulley

    • Model: Kawasaki & Arctic
    Kawasaki Spring Tension: 45 lbs. per inch
    Arctic Spring Temsion: 64 lbs. per inch
    Engagement Speed: 5500 R.P.M.
    Drive Belt Width: 1 1/4 inch
    Outside Drive Belt Circumference: 46 7/8 inches (+/- 3/16 inch)
     
  • Driven Pulley

    • Model: Comet
    Spring Color: Red
     
  • Drive/Driven Pulley

    • Center to Center Distance: 11 3/8 inches
    Offset: .320 inch
     
  • Gearing

    • With Arctic Drive Pulley: 22T/35T
    With Kawasaki Drive Pulley: 35T/20T
    Chain: 68 Pitch
     
  • Chassis

    • Chassis Material: Aluminum
    Belly Pan Material: Fiberglass
    Hood Material: Fiberglass
    Length W/Skis: 94 inches
    Height: 33 inches
    Overall Width: 33 1/2 inches
    Track Width: 15 inches
    Track Length on Ground: 30 inches
    Fuel Capacity: 4 1/2 gallons
    Chaincase Capacity: 8 ounces
    Weight: 315 pounds
     
  • Carburetor Specifications

    • Main Jet: 380
    Air Jet: -
    Jet Needle: 7DH2-3
    Needle Jet: AA-5
    Slide: 1.5
    Pilot Jet: 30
    Bypass Hole: 1.4
    Pilot Outlet: 0.8
    Air Screw: 1.0
    Inlet Seat: 1.5
    Starter Jet: 1.5
    Fuel Level: 37.0
    Bypass Pitch: 4.5
    Pump: DF52

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