JS Motorsport
 
 
motorcycle
HIGH-PERFORMANCE
PARTS
FOR NORTON TWINS
JS Motorsport
4480 North Academy Avenue
Sanger, CA 93657
Phone/Fax: 559 875 0659
Email: jim@jsmotorsport.com
JS Motorsport Technical
TECHNICAL LINKS
Lightweight pistons and longer rods Ultra-lightweight pistons & rods Cutting pistons for squish band
Camshafts, lifters & pushrods JS Smoothramp cams XR750, Full Auto, Axtell ports
modifing your own valves for Beehive springs Reed valve breather Fork damping sleeves
Norton fork upgrades Compression Balance specs
Weight/Vibration savings Piston weights, lifters & valve spring comparisons The oil tight Norton
BIKES AND BUILDERS
The Ultimate Norton Motor Most successful Norton racers Fastest 750 production bike at Bonniville
Monoshock & Twinshock chassis Engine builders
VIDEOS
Piston demo street run Piston leak down test Doug MacRae/Herb Becker roadrace
Keihin Carb demo Reed valve breather Norton race engine build, lower end
Norton race engine build, cylinders and lifters Timesert installation for head studs Re-angling for big valves
Porting a Full Auto head