JS Motorsport Videos

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

 

Doug MacRae on the Herb Becker built 1972 Norton 750 Commando short stroke with JS lightweight pistons and longer rods at Mosport in Canada Aug 12, 2017 in Superbike P3 middleweight. Watch Doug start from the back row and pass about 20 riders on his way towards the front.

 

Doug MacRae on the Herb Becker built 1972 Norton 750 Commando short stroke with JS lightweight pistons and longer rods in the BEARS race at Barber Motorsports Park, Oct. 2015. “I led the good part of the race but blew my primary belt on the last lap”.

 

Leak down test with JS pistons and total seal rings.

 

Norton race engine build – lower end.

 

Norton race engine build – cylinders.

 

Norton head building.

 

Norton camshaft timing.