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It's the sides of the pocket that the lobe sweeps through that needs machining.
Buckets are only changed when going to very high lift cams that need a smaller base circle on the lobe to achieve the lift.
From memory the standard and up to around 10.5mm lift are on 32mm base circle and beyond that 30mm base circle with corresponding thicker buckets.
Buckets are only changed when going to very high lift cams that need a smaller base circle on the lobe to achieve the lift.
From memory the standard and up to around 10.5mm lift are on 32mm base circle and beyond that 30mm base circle with corresponding thicker buckets.