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text HD Road King Timeline from PeterPanPlanet motopedia, with graphic of the world map with text, and in the bottom a serie of different models of Harley Davidson road king motorcycles

Road King's Timeline! Harley Davidson Road King is one of the iconic motorcycles in the world! Its story started from HD's FL series in 1941 with a 1210cc (74 cu in) Knucklehead engine! Harley Davidson factory has always loved these FL, EL, UL, ULH, FLT, FLH, FLHR, and so on for one reason or the other. I believe that the most hardcore Harley fans understand them but for most of us, they are just Klingon.
 However, before (FL) Road King was called Road King it was Hydra Glide from 1949 to 1958. From -58 to -65 it was Duo-Glide. From -65 to -79 a Tour Glide and then Electra Glide from 1979 to 1994 when it finally came Road King! Confused? Read from here more... HD FL in Wikipedia

black motorcycle Harley Davidson FL model 1941
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Harley Davidson FL

1210cc ° 53hp

white motorcycle Harley Davidson FLH model 1971
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Harley Davidson Tour Glide

1210cc ° 58hp

red motorcycle Harley Davidson FLH Road King model 2001
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Harley Davidson Road King

1450cc ° 67hp

black motorcycle Harley Davidson FL model 1951
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Harley Davidson Hydra Glide

1210cc ° 55hp

dark grey motorcycle Harley Davidson FLH model 1981
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Harley Davidson Electra Glide

1340cc ° 64hp

blue motorcycle Harley Davidson FLHR Road King model 2011
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Harley Davidson Road King

1580cc ° 75hp

white and blue motorcycle Harley Davidson FL model 1961
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Harley Davidson Duo Glide

1210cc ° 55hp

red motorcycle Harley Davidson FLH Road King model 1991
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Harley Davidson Electra Glide

1340cc ° 64hp

red motorcycle Harley Davidson FLHR Road King model 2021
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Harley Davidson Road King

1759cc ° 89hp

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