JS Motorsport
 
 
motorcycle
HIGH-PERFORMANCE
PARTS AND SERVICE
FOR NORTON TWINS
JS Motorsport
4480 North Academy Avenue
Sanger, CA 93657
Phone/Fax: 559 875 0659
Email: jim@jsmotorsport.com
JS Motorsport Videos

 

 

Lightweight pistons & lifters, longer rods, copper gaskets & street performance demo.

 

Flatslide carb installation and adjustment.

 

Magneto and flatslide startup demo.

 

Kenny Cummings wins at Gratten raceway with lightweight pistons & longer rods.

 

Norman test rides his 920cc Seeley on the street with lightweight pistons & longer rods.

 

Kenny Cummings takes on a 1000cc Moto Guzzi at Virginia international south raceway and wins using lightweight pistons and longer bushless rods,