Complete set of two Norton Ultra Hi CR domed pistons 750 to 850cc. For JSM longer rods.


These JE domed pistons to give you approx 11.3:1 C.R. for 750cc long strokes and 750 shortstrokes (more info). 73mm = 185 grams. 77mm = 210 grams. FOR RACING FUEL ONLY.  A drop in kit compatible with all types of cylinders.  No modifications necessary except that bores greater than 78.5mm will need larger diameter combustion chambers. Includes rings, clips and .708″ DLC pins. Must be combined with our longer rods. Not recommended for 850s and up unless using alcohol (approx 12.5 to 13:1 C.R.). Will work for gasoline 850s with combustion chambers larger than 51cc (approx 12:1 C.R.). Crank rebalancing is not required (balancing info).  Domed short stroke pistons for factory fully hemisphered big valve heads available on special order.  These are the lightest, highest quality domed pistons you can buy for your Norton.

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