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My pair are a novelty item too!  But they are the short stroke Omega piston but machined from the blank with the smaller Commando gudgeon pin size.


Done to build 850 motors with RH7 heads for 501 to 1000 class racing which was popular in the UK at the time.


Dave Croxford has said it was the best configuration of works Norton he rode.


Having run one of these engines for 4 seasons, I know exactly what he meant.  Mid-range by the bucket load, and better top end than anything based on a long stroke head!


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