Complete set of two Norton Ultra Hi CR domed pistons 750 to 1007cc. For JSM longer rods.

These JE domed pistons to give you approx 11.3:1 C.R. for 750s (more info). 73mm = 185 grams. 77mm = 210 grams. FOR RACING FUEL ONLY.  Not recommended for 850s and up unless using alcohol (approx 12.5 to 13:1 C.R.). 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. Crank rebalancing is not required (balancing info).  Domed short stroke pistons for factory fully hemisphered big valve heads available on special order.  These J.E. uncoated pistons are the lightest, highest quality domed pistons you can buy for your Norton. Add TiN (titanium nitride) top ring coating to avoid vertical stripes on Nikasil coated alum wall cylinders (order ring coating here).  Dyno tests ave shown approx 7HP increase just by changing to the longer rods and JS lightweight pistons.