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Ducati Corse
Posts: 3,134
Join Date: Jan 2002
Location: notts
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With you mentioning E, I guess you're talking 748??
The R heads have 36mm/30mm valves and the pulleys are wider (thicker belts).
The valve lift will also be about 1mm higher on both inlet/exhaust.
After that, you need to pull the cams and check those.