midgy Posted September 30, 2022 Report Share Posted September 30, 2022 Hi Guys, Having now fully cleaned up my 198B barrel and cylinder head, the top of the barrel and the underside of the head are stamped 137. It has been over-bored to 73.75 giving 256cc. Do the Bultaco Sherpa gurus suggest my head and barrel came off an older 250 Alpina 137 from 1974/1976? The bike was apparently supplied directly by Comerfords in early 1982 as one of about 110 bikes supplied and sold by them, and was allegedly billed as a 'Vesty Replica' Or perhaps just put together by Bultaco factory using what was just lying around? And presumably over-bored to the max early in its life? Ideas appreciated. Thanks Quote Link to comment Share on other sites More sharing options...
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