Content Source: 2021 Indian Heavyweight Owner’s Manual (9931551 R01) > Specifications Chapter

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Engine

Thunder Stroke 111

  Thunder Stroke 111
Engine Type Thunder Stroke 111, Air Cooled
Configuration V-Twin
Displacement 111 cu. in. (1811 cc)
Cooling System Air Cooled (Cruiser Models) Air/Oil Cooler (Bagger/Tour Models)
Compression Ratio 9.5:1
Valve Train 2 Valves Per Cylinder, Hydraulic Lifters
Bore and Stroke 3.976" x 4.449" (101mm x 113mm)
Fuel System/Throttle Body Bore Closed Loop Fuel Injection/54 mm
Exhaust System 1 into 2 with Catalytic Converter
Split Dual Exhaust with Cross-over
Rev Limit 5400 RPM
Idle RPM 800 +/- 50 RPM Fully Warm
Lubrication System Semi-Dry Sump
Spark Plug/Gap NGK DCPR8E/.034 inch (0.90 mm)

Thunder Stroke 116

  Thunder Stroke 116
Engine Type Thunder Stroke 116, Air Cooled
Configuration V-Twin
Displacement 115 cu. in. (1890 cc)
Cooling System Air Cooled (Cruiser Models) Air/Oil Cooler (Bagger/Tour Models)
Compression Ratio 11.0:1
Valve Train 2 Valves Per Cylinder, Hydraulic Lifters
Bore and Stroke 4.063" x 4.449" (103.2 mm x 113 mm)
Fuel System/Throttle Body Bore Closed Loop Fuel Injection/54 mm
Exhaust System 1 into 2 with Catalytic Converter
Split Dual Exhaust with Cross-over
Rev Limit 5400 RPM
Idle RPM 900 +/- 50 RPM Fully Warm
Lubrication System Semi-Dry Sump
Spark Plug/Gap NGK DCPR8E/.034 inch (0.90 mm)

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