5 0 R ▁deb uted ▁in ▁ 1 9 8 4 ▁as ▁a ▁development ▁prototype , ▁racing ▁in ▁the ▁domestic ▁All ▁Japan ▁Road ▁Race ▁Championship ▁and ▁entering ▁some ▁r ounds ▁in ▁the ▁World ▁Championship . ▁It ▁was ▁put ▁on ▁sale ▁for ▁customer ▁teams ▁for ▁the ▁ ▁season ▁on wards . ▁ ▁The ▁H onda ▁R S 2 5 0 R ▁featured ▁a ▁V - t win ▁ 2 5 0   cc ▁two - stroke ▁engine ▁with ▁a ▁V - angle ▁of ▁ 9 0 ▁degrees . ▁A ▁new ▁ 7 5 ▁degrees ▁V - t win ▁was ▁introduced ▁in ▁ 1 9 9 3 . ▁ ▁Between ▁ 1 9 8 4 ▁and ▁ 2 0 0 9 ▁the ▁R S 2 5 0 R ▁has ▁been ▁produced ▁in ▁four ▁different ▁gener ations , ▁named : ▁N D 5 ▁( 1 9 8 4 ), ▁N F 5 ▁( 1 9 8 7 ), ▁N X 5 ▁( 1 9 9 3 ) ▁and ▁N X A ▁( 2 0 0 1 ). ▁ ▁The ▁bi ke ▁shouldn ' t ▁be ▁confused ▁with ▁the ▁R S 2 5 0 R W , ▁who ▁was ▁the ▁name ▁adopted ▁for ▁factory ▁b ikes ▁in ▁ 1 9 8 5 ▁and ▁from ▁ 2 0 0 3 ▁to ▁ 2 0 0 9 . ▁Between ▁ 1 9 8 6 ▁and ▁ 2 0 0 2 ▁the ▁factory ▁b ikes ▁were ▁named ▁NS R 2 5 0 . ▁ ▁External ▁links ▁▁▁ 1 9 9