bro RX125 (1v1) that model was imported in Pak, it has point engine, 56x50 boreXstroke, without Y.I.E.S
not much popular becuase it had less acceleration n top then rx115, RX125(1V1) was intro in mid 70,s and till 1980 it was considering a good road bike of its class, but after arrival of RX115 in 1981, The popularity came into 115 side,
in mid 80,s YEIS equipted RX125 came into market, but not in PAK, and those bikes engine were made same like rx115,s specs but with 56mm bore,as like (3M5,1TT,1UU)
In last point model rx125 cant compete as stock bike with rx115 stock bike,
just tell you the drag kind of thing coz lot of drag word was being used here in the thread
you can easily do 0 to 100 in almost 5.5 seconds@rx115........and one bigger thing is about to come and that is its big bro RXK(135) having 58x50 BoreXstroke.....and that is a hell of a power.....and one more is also available or only rx junkys and that is RXZ135, having 56x54 BoreXstroke and that the last and having extreme power(22ps) of RX series
i hope it will be enough for you regarding word of RX, and Dear ALL thanks for being with me by RX