▁single ▁model ▁called ▁the ▁V - R od . ▁The ▁V - R od ▁was ▁developed ▁to ▁comp ete ▁against ▁Japanese ▁and ▁American ▁mus cle ▁b ikes . ▁The ▁" V - R od " ▁made ▁use ▁of ▁the ▁Revolution ▁engine , ▁developed ▁joint ly ▁with ▁Por sche ▁that , ▁for ▁the ▁first ▁time ▁used ▁overhead ▁c ams ▁and ▁liquid ▁cool ing . ▁Un like ▁other ▁Har ley ▁production ▁motor cy cles , ▁a ▁ 6 0 - deg ree ▁V - t win ▁engine , ▁the ▁radi ator ▁and ▁the ▁hydro formed ▁frame ▁members ▁support ▁the ▁round - to pped ▁air ▁cleaner ▁cover . ▁The ▁fuel ▁tank ▁on ▁the ▁V - R od ▁is ▁located ▁under ne ath ▁the ▁seat , ▁placing ▁the ▁r ider ▁on ▁top ▁of ▁it , ▁rather ▁than ▁the ▁usual ▁front al ▁pla cement . ▁The ▁" t ank " ▁in ▁this ▁case ▁is ▁actually ▁the ▁cover ▁for ▁the ▁air ▁box ▁and ▁cool ant ▁fill ▁port . ▁Lo os ely ▁based ▁on ▁the ▁V R - 1 0 0 0 ▁Super bi ke , ▁Har ley - David son ▁builds ▁it ▁as ▁a ▁platform ▁for ▁drag - rac ing ▁competition ▁machines . ▁All ▁V R SC ▁models ▁are ▁produced ▁at ▁Har ley - David son ' s ▁Ve h icle ▁and ▁Pow ert rain ▁Oper ations ▁facility ▁in ▁Kansas ▁City , ▁Missouri . ▁ ▁The ▁V - R od ' s ▁engine , ▁called ▁Revolution , ▁while ▁based ▁on ▁the ▁V R - 1 0 0 0 ▁Super