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23) Whilst the 'new' cam had the same 5;45;45;5 timings of the YB, it was in fact a more modern profile with wider lobes to improve life. The shape of the lobe profile enabled the tappet clearance to be reduced to 0.012" from 0.019", hence it was a lot quieter. It is called the 230 degree cam, with 8.3mm lift. The plate on the rocker cover gave the new clearance, and this was SC2/18097 and the ... ................
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