Harley-Davidson OEM number 31723-71

keeping your gas tank looking very clean

These give 1/2" of rise

it’s a practical and stylish upgrade for your ride

or Norton motorcycle with the Wassell/Vape electronic ignition

N-Grind Camshaft - 1937-1947 Harley-Davidson Knucklehead Subcategory_Sissy Bar & Tail Bags Harley-Davidson OEM number 31723-71As amazing as it sounds, there are lots of Knuckle engines still going strong. Knuckles have been around for almost 80 years! How many other motorcycles can make this kind of a claim for long life and durability? Old Knuckles Run Forever! When purchasing camshafts be sure to make sure they are correct for your model, refer to your manual for cam replacement procedures, and be aware you will need to change intake and exhaust components to achieve