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 49–60 of 111 results
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3/8″ – 16 TPI x .620″ lengthTime-Sert Kit for the 3 head studs with extra tap for bottoming
$199.00 Add to cart -
3/8″ – 16 TPI x 1.2″ length Time-Sert Kit for JSM kit #1 Molnar head bolts with US thread.
$199.00 Add to cart -
Norton pushrod set to be used with JSM lightweight radiused lifters and radiused cam only
$149.00 Select options This product has multiple variants. The options may be chosen on the product page -
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Beehive valve spring set only
$79.00 Add to cart -
Beehive valve spring set without valves (fits JSM valves only)
$199.00 Select options This product has multiple variants. The options may be chosen on the product page -
High performance stock size Black Diamond valve & Beehive spring kit. Smaller Domni valves available on special order.
$339.00 Select options This product has multiple variants. The options may be chosen on the product page -
High performance Big valve & Beehive spring kit
$389.00 Select options This product has multiple variants. The options may be chosen on the product page -
Valve spring shims (4) for balancing, 2 different thicknesses available, fits all
$5.00 Select options This product has multiple variants. The options may be chosen on the product page -
Valve spring bottom washers (4) for Beehive springs only, 3 different thicknesses available
$29.00 Select options This product has multiple variants. The options may be chosen on the product page -
Black diamond stock size valve set for JS Beehive valve springs only. Smaller Domni valves available on special order.
$149.00 Add to cart -
Big valve set. Black diamond or Tuftrided for JS Beehive valve springs only
$219.00 Select options This product has multiple variants. The options may be chosen on the product page
