Through years of extensive testing on both road and track, JS Motorsport has developed high-end products in a modern format that will increase a Norton’s performance, reliability and rideability. JSM lightweight pistons & rods give you the smooth running Norton of your dreams.
Showing 25–36 of 111 results
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Kit #2 – Reduced shank British ARP 3/8″ x 26 tpi SS head bolts for STOCK CYLINDERS
$129.00 Add to cart -
Longer lasting JS radiused cam – a drop in kit. We regrind your original flat lifters to a 1-1/8″ radius, use your original pushrods for Commando, Atlas/Domni
$649.00 Select options This product has multiple variants. The options may be chosen on the product page -
Oil junction block gasket
$3.00 Add to cart -
Longer lasting radius cam kit complete with lightweight lifters, bronze blocks and pushrods for Commando, Atlas/Domni
$999.00 Select options This product has multiple variants. The options may be chosen on the product page -
Timing cover gasket for Commando or Atlas
$24.00 Add to cart -
Kit #3 – Reduced shank British ARP 3/8″ x 20 tpi SS head bolts for MOLNAR cylinders
$129.00 Add to cart -
Offset stepped key for re-timing camshaft 2 deg
$6.00 Add to cart -
Tachometer drive gasket for Commando
$3.00 Add to cart -
Lightweight BSA A65 lifters (4) for JSM radiused Norton cams (and BSAs)
$249.00 Select options This product has multiple variants. The options may be chosen on the product page -
Tranny cover gasket
$19.00 Add to cart -
Ampco 15 Bronze lifter blocks (2) for lightweight radiused BSA lifters and JSM radiused cams, (lifters not included). Oil holes drain directly onto cam lobes for increased life
$149.00 Add to cart -
Tranny intermediate gasket
$19.00 Add to cart
