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⁾

• 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:

• 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.)

¹⁴⁾

• 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

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⁾

What is the Current KBB Value? ¹⁷⁾

What is the Current KBB Value? ¹⁸⁾

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