CS1
... that Alec Bennett, riding the CS1 on its first race, won the Isle of Man Senior TT in 1927?
... that <a href="./Alec_Bennett" id="mwG6A" rel="mw:WikiLink" title="Alec Bennett">Alec Bennett</a>, riding the <b id="mwG6E"><a href="./Norton_CS1" id="mwG6I" rel="mw:WikiLink" title="Norton CS1">CS1</a></b> on its first race, won the <a href="./Isle_of_Man_TT" id="mwG6M" rel="mw:WikiLink" title="Isle of Man TT">Isle of Man Senior TT</a> in 1927?