1970 Sportster

  • Starting with the 1970 season, Vehicle Identification Number (VIN) is stamped on the right side of the engine crankcase and on the frame. In addition to these numbers, an identification label is located on the frame giving the VIN and date of manufacture. This label was required by law for identification.1)
  • 4A13675H0 is a 1970 XLCH.
  • The serial number is the 3rd through the 7th digit. All serial numbers run consecutively regardless of model year. 2)
Model CodeModel NumberSerial NumberManufacturer IDModel Year
XLH3A10,000 and up (5 digits)H (for Harley Davidson)0 (1970)
XLCH4A10,000 and up (5 digits)H (for Harley Davidson)0 (1970)
XR-7501C10,000 and up (5 digits)H (for Harley Davidson)0 (1970)
XLRTT9B10,000 and up (5 digits)H (for Harley Davidson)0 (1970)

Engine- 883

  • Engine type: Air Cooled, Overhead Valve, V-twin 3)Iron Head
  • Displacement: 54 ci / 883 cc
  • Hemi-spherical style heads
  • Bore: 3 in / 7.62 cm 4)
  • Stroke: 3.8125 in / 9.68 cm 5)
  • Piston Displacement: 53.9 cu. in. / 883 cc 6)
  • 90 Degree Valve Angle
  • Compression: 9.0:1 7)
  • Horsepower: 58 @ 6800 rpm 8)
  • Torque: 52 ft-lb / 2.191 Nm @ 3800 rpm 9)
  • Fuel System: Tillotson Carburetor 10)
  • Carburetor Main Jets:
  • Carburetor Slow Jet:
  • Engine Idle Slow Speed:
  • Engine speed for setting ignition timing:
  • Fuel Tank Capacity:
  • Oil Tank Capacity w/Filter:

Capacities

  • Fuel capacity: 4 gal / 15.14 l or 2.2 gal / 8.328 l 11)
  • Oil Capacity: 3 qts. / 2.83 l 12)
  • Transmission Capacity: 1.5 pints / .71 l 13)
  • MPG: 50mpg (est.)

Dimensions

XL, XLHXLCH
Wheelbase 58 1/2 in / 148.59 cm58 1/2 in / 148.59 cm
Overall Length87 1/4 in / 221.61 cm87 1/4 in / 221.61 cm
Overall Width 33 in / 83.82 cm33 in / 83.82 cm
Overall Height40 1/2 in / 103 cm42 in / 106.7 cm
Road Clearance6 3/4 in / 17.145 cm6 1/2 in / 16.51 cm

14)

Drivetrain

  • Constant Mesh - Foot shift
  • Speeds - 4 Forward
  • Number of Sprocket Teeth
    • Engine: 34
    • Clutch: 59
    • Transmission: 20 (XLCH 19)
    • Rear Wheel: 51
  • Gear Ratios (XL,XLH)
    • 1st: 11.16 to 1
    • 2nd: 8.08 to 1
    • 3rd: 6.11 to 1
    • 4th: 4.42 to 1
  • Gear Ratios (XLCH)
    • 1st: 11.74:1
    • 2nd: 8.50:1
    • 3rd: 6.43:1
    • 4th: 4.66:1

Tires

GoodyearYokohama
FrontMM90-19 (3.75×19) Sport RibY-980 (3.75x19T) High Speed
Rear4.25×18 All TractionY-622 (4.25x18T) High Speed

15)

  • Tire pressure
    • Front: 24 psi / 1.655 bar
    • Rear: 30 psi / 2.068 bar

Tire pressure based on 150 lb rider. When weight is exceeded by 50 lbs or more, increase the rear by 2 lbs and front by 1 lb. Repeat for each additional 50 lbs of weight. 16)

Models

XLH 883

What is the Current KBB Value? 17)

XLCH 883

What is the Current KBB Value? 18)


Back to Sportster History Index

1) , 2)
HD Service School service bulletin #596 dated September 16, 1969
3) , 4) , 5) , 6) , 7) , 8) , 9) , 11) , 12) , 13) , 14) , 15) , 16)
Harley-Davidson 1970 - 1977 Service Manual
10)
1970-2010 Haynes Sportster Service and Repair Manual
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