Description A pair of used Alpina 250cc model 137 crankcases Engine number stamped as a 137 model* 5 speed These cases will fit these models of Bultaco- Alpina 250cc model 137 – from engine number 13700571 onwards Sherpa 250cc models 158 , 182 , 190 Cases in good condition overall , just need a good clean hence the lower price….. Bultaco part numbers 137.10.036(2) LEFT / 137.10.037(3) RIGHT
