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I have them on two 1973 MkV 750, one I have owned since new. And another RH6 head on the shelf for a possible future build. More compression than the standard 750 head (or RH5) but a little less than the Combat head. 32mm intake ports. My favorite 750 head for street use.

[QUOTE="Ron L, post: 684339, member: 77"] I have them on two 1973 MkV 750, one I have owned since new. And another RH6 head on the shelf for a possible future build. More compression than the standard 750 head (or RH5) but a little less than the Combat head. 32mm intake ports. My favorite 750 head for street use. [/QUOTE]

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