What technical specifications are included in the WowShopper Motorcycle Directory?

The WowShopper Motorcycle Factory Specifications Directory provides verified OEM-grade workshop data including engine oil capacities with filter, recommended oil viscosities (e.g., 10W-40, 20W-50), OEM spark plug part numbers and electrode gap tolerances, drive chain pitch and slack, cold tire inflation pressures (front and rear PSI), primary and transmission fluid capacities, valve clearances, and factory fastener torque specifications.

Why should motorcycle maintenance specifications be verified against OEM data?

Motorcycle engines and chassis operate under high mechanical loads and RPM ranges. Using improper oil viscosities can cause premature valvetrain wear or clutch slippage in wet-clutch systems. Incorrect tire pressures alter contact patches and handling dynamics, while improper drive chain slack risks binding and damaging transmission countershaft bearings.

Are the tire pressure specifications listed for cold or hot tires?

All tire pressures listed in our workshop directory are cold inflation pressures, measured before riding when tires are at ambient outdoor temperature. Riding generates internal tire friction that increases air pressure by 3 to 6 PSI.

How do I look up factory specifications for my specific motorcycle?

Select your motorcycle manufacturer from the directory list (e.g., Harley-Davidson, Yamaha, Honda, Suzuki, Kawasaki, BMW, Ducati, KTM, Triumph, Aprilia, Indian, Husqvarna), or enter your model name into the search bar. You can also view dedicated subsystem manuals including ignition, braking, and drivetrain.

How does applying threadlocker or anti-seize affect motorcycle fastener torque?

Factory motorcycle torque specifications assume clean, dry threads unless explicitly stated. Lubricating threads with anti-seize, threadlocker (Loctite), or motor oil lowers the friction coefficient (K-factor) by 15% to 25%. Tightening a lubricated fastener to the published dry torque generates excessive bolt tension (preload) that can stretch the bolt past its yield limit or strip soft aluminum crankcase threads.

Why do motorcycle valve clearances get tighter instead of looser over time?

As motorcycle engines accumulate operating hours, repeated valve seat impacts cause microscopic valve face recession into the cylinder head. This recession draws the valve stem upward toward the camshaft, shrinking the cold clearance gap. If neglected, the clearance gap reduces to zero, preventing the valve from fully seating to dissipate heat, leading to burned exhaust valves and lost cylinder compression.

Mechanic-Grade Workshop Manuals

Motorcycle Factory Specifications & Maintenance Directory

Verified OEM workshop manual reference: fluid capacities, spark plug tolerances, drive chain slack, cold tire inflation pressures, and service intervals for modern motorcycles.

Diagnostic Trouble Codes (DTC)Factory Service Bulletins (TSB)Safety Recalls Torque Specs Tire & PSI Finder Battery Finder ECU Procedures All 14 Tools →

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Showing 17 motorcycle models in harley-davidson

Harley Davidson2009–2022

Iron 883 (Sportster)

883cc•45° Evolution V-Twin

Engine Oil

2.65 L

20W-50

Spark Plug

HD 6R12 / NGK DCPR7E

0.9 - 1.0 mm

Front Tire

100/90-19

30 PSI

Rear Tire

150/80B16

36 PSI

Workshop Specs Shop Parts

Harley Davidson2020–2024

Low Rider S (FXLRS Milwaukee-Eight)

1868cc•Milwaukee-Eight 114 / 117 (45° V-Twin)

Engine Oil

4.70 L

20W-50

Spark Plug

Harley 6R10 / NGK CPR7EA-9

0.8 - 0.9 mm

Front Tire

110/90B19

36 PSI

Rear Tire

180/70B16

40 PSI

Workshop Specs Shop Parts

Harley Davidson2017–2026

Road Glide (Milwaukee-Eight)

1746cc•45° V-Twin Milwaukee-Eight 107 / 114

Engine Oil

3.80 L

20W-50

Spark Plug

HD 6R12 / NGK DCPR7E

0.8 - 0.9 mm

Front Tire

130/60B19

36 PSI

Rear Tire

180/55B18

40 PSI

Workshop Specs Shop Parts

Harley Davidson2007–2022

Sportster 1200 (Forty-Eight / Iron 1200)

1202cc•Evolution V-Twin (45°)

Engine Oil

2.65 L

20W-50

Spark Plug

Harley 6R12 / NGK DCPR7E

0.9 - 1.0 mm

Front Tire

100/90-19

30 PSI

Rear Tire

150/80B16

36 PSI

Workshop Specs Shop Parts

Harley Davidson2017–2026

Street Glide (Milwaukee-Eight)

1746cc•45° V-Twin Milwaukee-Eight 107 / 114

Engine Oil

3.80 L

20W-50

Spark Plug

HD 6R12 / NGK DCPR7E

0.8 - 0.9 mm

Front Tire

130/60B19

36 PSI

Rear Tire

180/55B18

40 PSI

Workshop Specs Shop Parts

Harley Davidson1999–2006

Twin Cam 88 (Dyna / Softail / Touring)

1450cc•45° Twin Cam V-Twin

Engine Oil

3.30 L

20W-50

Spark Plug

HD 6R12 / Champion RA8HC / NGK DCPR7E

0.97 - 1.09 mm

Front Tire

MT90B16 (Touring) / 100/90-19 (Dyna)

36 PSI

Rear Tire

MU85B16 (Touring) / 130/90-16 or 150/80B16 (Dyna/Softail)

40 PSI

Workshop Specs Shop Parts

Harley Davidson2007–2016

Twin Cam 96 / 103 (Dyna / Softail / Touring)

1690cc•45° Twin Cam V-Twin

Engine Oil

3.80 L

20W-50

Spark Plug

HD 6R12 / Champion RA8HC / NGK DCPR7E

0.97 - 1.09 mm

Front Tire

130/80B17 (Touring) / 100/90-19 (Dyna) / 130/90B16 (Softail)

36 PSI

Rear Tire

180/65B16 (Touring) / 160/70B17 (Dyna) / 200/55R17 (Fat Boy)

40 PSI

Workshop Specs Shop Parts

Harley Davidson1984–1999

Evolution 80ci (Dyna / Softail / FXR / Touring)

1340cc•45° Evolution V-Twin

Engine Oil

2.84 L

20W-50

Spark Plug

HD 5R6A / Champion RN12YC / NGK BPR5ES

0.97 - 1.09 mm

Front Tire

MT90B16 (Touring) / 100/90-19 (Dyna) / MH90-21 (FXST Softail)

36 PSI

Rear Tire

MT90B16 or 130/90B16

40 PSI

Workshop Specs Shop Parts

Harley Davidson2021–2026

Revolution Max 1250 / 1250T (Pan America / Sportster S)

1252cc•60° V-Twin

Engine Oil

4.50 L

15W-50

Spark Plug

HD 6R10 / NGK LMAR9D-J

0.80 - 0.90 mm

Front Tire

120/70R19 (Pan America) / 160/70R17 (Sportster S)

36 PSI

Rear Tire

170/60R17 (Pan America) / 180/70R16 (Sportster S)

42 PSI

Workshop Specs Shop Parts

Harley-Davidson1990–2026

Fat Boy / Fat Boy 114 (FLSTF / FLFB / FLFBS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103B / 96B / 88B

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

160/60R18 70V

N/A

Rear Tire

240/40R18 79V

N/A

Workshop Specs Shop Parts

Harley-Davidson1986–2026

Heritage Classic / 114 (FLSTC / FLHC / FLHCS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103B / 96B / 88B V-Twin

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

130/90B16 73H

N/A

Rear Tire

150/80B16 77H

N/A

Workshop Specs Shop Parts

Harley-Davidson2002–2017

V-Rod / Night Rod Special / Muscle (VRSC / VRSCA / VRSCDX / VRSCF)

1247cc•Porsche Co-Developed 60° V-Twin Revolution

Engine Oil

4.30 L

H-D

Spark Plug

NGK DCPR9E

0.8–0.9 mm

Front Tire

120/70ZR19 60W

N/A

Rear Tire

240/40R18 79V (Early 2002-2006 Models: 180/55ZR18)

N/A

Workshop Specs Shop Parts

Harley-Davidson2013–2026

Breakout / Breakout 114 / 117 (FXSB / FXBR / FXBRS)

1923cc•Milwaukee-Eight 117ci (1923cc) / 114ci (1868cc) & Twin Cam 103B (1690cc) Counterbalanced V-Twin

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

130/60B21 63H

N/A

Rear Tire

240/40R18 79V

N/A

Workshop Specs Shop Parts

Harley-Davidson1994–2026

Road King / Road King Special (FLHR / FLHRC / FLHRXS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103 / 96 / 88 Touring V-Twin

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

130/60B19 61H (Special) / 130/80B17 65H (Standard)

N/A

Rear Tire

180/55B18 80H (Special) / 180/65B16 81H (Standard)

N/A

Workshop Specs Shop Parts

Harley-Davidson2006–2026

Street Bob / Street Bob 114 (FXDB / FXBB / FXBBS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103 / 96 V-Twin (Dyna & Softail Eras)

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

100/90B19 57H

N/A

Rear Tire

150/80B16 77H

N/A

Workshop Specs Shop Parts

Harley-Davidson2021–2025

Pan America 1250 Special (RA1250S)

1252cc•Revolution Max 1250 60° V-Twin

Engine Oil

4.50 qt

Screamin'

Spark Plug

OEM H-D 31600085

0.8 - 0.9 mm

Front Tire

120/70R19 (60V)

N/A

Rear Tire

170/60R17 (72V)

N/A

Workshop Specs Shop Parts

Harley-Davidson2017–2024

Road Glide / Street Glide M8 (107/114/117)

1868cc•Milwaukee-Eight 45-Degree V-Twin

Engine Oil

4.0 qt

SAE

Spark Plug

Harley-Davidson 6R12 / NGK DCPR7E

0.97 mm

Front Tire

130/60B19 61H

N/A

Rear Tire

180/55B18 80H

N/A

Workshop Specs Shop Parts

Showing 17 motorcycle models in harley-davidson

Harley Davidson2009–2022

Iron 883 (Sportster)

883cc•45° Evolution V-Twin

Engine Oil

2.65 L

20W-50

Spark Plug

HD 6R12 / NGK DCPR7E

0.9 - 1.0 mm

Front Tire

100/90-19

30 PSI

Rear Tire

150/80B16

36 PSI

Workshop Specs Shop Parts

Harley Davidson2020–2024

Low Rider S (FXLRS Milwaukee-Eight)

1868cc•Milwaukee-Eight 114 / 117 (45° V-Twin)

Engine Oil

4.70 L

20W-50

Spark Plug

Harley 6R10 / NGK CPR7EA-9

0.8 - 0.9 mm

Front Tire

110/90B19

36 PSI

Rear Tire

180/70B16

40 PSI

Workshop Specs Shop Parts

Harley Davidson2017–2026

Road Glide (Milwaukee-Eight)

1746cc•45° V-Twin Milwaukee-Eight 107 / 114

Engine Oil

3.80 L

20W-50

Spark Plug

HD 6R12 / NGK DCPR7E

0.8 - 0.9 mm

Front Tire

130/60B19

36 PSI

Rear Tire

180/55B18

40 PSI

Workshop Specs Shop Parts

Harley Davidson2007–2022

Sportster 1200 (Forty-Eight / Iron 1200)

1202cc•Evolution V-Twin (45°)

Engine Oil

2.65 L

20W-50

Spark Plug

Harley 6R12 / NGK DCPR7E

0.9 - 1.0 mm

Front Tire

100/90-19

30 PSI

Rear Tire

150/80B16

36 PSI

Workshop Specs Shop Parts

Harley Davidson2017–2026

Street Glide (Milwaukee-Eight)

1746cc•45° V-Twin Milwaukee-Eight 107 / 114

Engine Oil

3.80 L

20W-50

Spark Plug

HD 6R12 / NGK DCPR7E

0.8 - 0.9 mm

Front Tire

130/60B19

36 PSI

Rear Tire

180/55B18

40 PSI

Workshop Specs Shop Parts

Harley Davidson1999–2006

Twin Cam 88 (Dyna / Softail / Touring)

1450cc•45° Twin Cam V-Twin

Engine Oil

3.30 L

20W-50

Spark Plug

HD 6R12 / Champion RA8HC / NGK DCPR7E

0.97 - 1.09 mm

Front Tire

MT90B16 (Touring) / 100/90-19 (Dyna)

36 PSI

Rear Tire

MU85B16 (Touring) / 130/90-16 or 150/80B16 (Dyna/Softail)

40 PSI

Workshop Specs Shop Parts

Harley Davidson2007–2016

Twin Cam 96 / 103 (Dyna / Softail / Touring)

1690cc•45° Twin Cam V-Twin

Engine Oil

3.80 L

20W-50

Spark Plug

HD 6R12 / Champion RA8HC / NGK DCPR7E

0.97 - 1.09 mm

Front Tire

130/80B17 (Touring) / 100/90-19 (Dyna) / 130/90B16 (Softail)

36 PSI

Rear Tire

180/65B16 (Touring) / 160/70B17 (Dyna) / 200/55R17 (Fat Boy)

40 PSI

Workshop Specs Shop Parts

Harley Davidson1984–1999

Evolution 80ci (Dyna / Softail / FXR / Touring)

1340cc•45° Evolution V-Twin

Engine Oil

2.84 L

20W-50

Spark Plug

HD 5R6A / Champion RN12YC / NGK BPR5ES

0.97 - 1.09 mm

Front Tire

MT90B16 (Touring) / 100/90-19 (Dyna) / MH90-21 (FXST Softail)

36 PSI

Rear Tire

MT90B16 or 130/90B16

40 PSI

Workshop Specs Shop Parts

Harley Davidson2021–2026

Revolution Max 1250 / 1250T (Pan America / Sportster S)

1252cc•60° V-Twin

Engine Oil

4.50 L

15W-50

Spark Plug

HD 6R10 / NGK LMAR9D-J

0.80 - 0.90 mm

Front Tire

120/70R19 (Pan America) / 160/70R17 (Sportster S)

36 PSI

Rear Tire

170/60R17 (Pan America) / 180/70R16 (Sportster S)

42 PSI

Workshop Specs Shop Parts

Harley-Davidson1990–2026

Fat Boy / Fat Boy 114 (FLSTF / FLFB / FLFBS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103B / 96B / 88B

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

160/60R18 70V

N/A

Rear Tire

240/40R18 79V

N/A

Workshop Specs Shop Parts

Harley-Davidson1986–2026

Heritage Classic / 114 (FLSTC / FLHC / FLHCS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103B / 96B / 88B V-Twin

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

130/90B16 73H

N/A

Rear Tire

150/80B16 77H

N/A

Workshop Specs Shop Parts

Harley-Davidson2002–2017

V-Rod / Night Rod Special / Muscle (VRSC / VRSCA / VRSCDX / VRSCF)

1247cc•Porsche Co-Developed 60° V-Twin Revolution

Engine Oil

4.30 L

H-D

Spark Plug

NGK DCPR9E

0.8–0.9 mm

Front Tire

120/70ZR19 60W

N/A

Rear Tire

240/40R18 79V (Early 2002-2006 Models: 180/55ZR18)

N/A

Workshop Specs Shop Parts

Harley-Davidson2013–2026

Breakout / Breakout 114 / 117 (FXSB / FXBR / FXBRS)

1923cc•Milwaukee-Eight 117ci (1923cc) / 114ci (1868cc) & Twin Cam 103B (1690cc) Counterbalanced V-Twin

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

130/60B21 63H

N/A

Rear Tire

240/40R18 79V

N/A

Workshop Specs Shop Parts

Harley-Davidson1994–2026

Road King / Road King Special (FLHR / FLHRC / FLHRXS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103 / 96 / 88 Touring V-Twin

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

130/60B19 61H (Special) / 130/80B17 65H (Standard)

N/A

Rear Tire

180/55B18 80H (Special) / 180/65B16 81H (Standard)

N/A

Workshop Specs Shop Parts

Harley-Davidson2006–2026

Street Bob / Street Bob 114 (FXDB / FXBB / FXBBS)

1868cc•Milwaukee-Eight 114ci (1868cc) / 107ci (1746cc) & Twin Cam 103 / 96 V-Twin (Dyna & Softail Eras)

Engine Oil

4.70 L

H-D

Spark Plug

H-D 6R10 / 6R12

0.8–0.9 mm

Front Tire

100/90B19 57H

N/A

Rear Tire

150/80B16 77H

N/A

Workshop Specs Shop Parts

Harley-Davidson2021–2025

Pan America 1250 Special (RA1250S)

1252cc•Revolution Max 1250 60° V-Twin

Engine Oil

4.50 qt

Screamin'

Spark Plug

OEM H-D 31600085

0.8 - 0.9 mm

Front Tire

120/70R19 (60V)

N/A

Rear Tire

170/60R17 (72V)

N/A

Workshop Specs Shop Parts

Harley-Davidson2017–2024

Road Glide / Street Glide M8 (107/114/117)

1868cc•Milwaukee-Eight 45-Degree V-Twin

Engine Oil

4.0 qt

SAE

Spark Plug

Harley-Davidson 6R12 / NGK DCPR7E

0.97 mm

Front Tire

130/60B19 61H

N/A

Rear Tire

180/55B18 80H

N/A

Workshop Specs Shop Parts