1975 Norton Mk3, Primary chain case upgrade, Installing a CNW Sprocket, Sprag and gear set

In this video we work on a 1975 Norton Mk3 primary chain case and replace the worn out sprocket, sprag gear/clutch and drive gear and replace it with a new set from Colorado Norton Works.

[@norton794]

Good Morning I don't know if you've seen it but have a look at chris rooke utube channel he's had problems with a NORVIL built Commando and it would appear some of the problems are with the lubrication on the sprag bearings. Very informative and enjoyable build on the Commando, well done.

[@stephenbaron5681]

I just talked to Mat at CNW about the starter sprague upgrade, now that I know the problem I will check my parts to see if they are warn. Great video as always. I am in the fun parts ordering phase of my MK3 rebuild.

[@jessesvintagegarage765]

Awesome thanks for the great comment,

[@maaseyracer]

Now go get yourself a Dyno Dave starter motor and enjoy your new electric start daily driver. While you are at it reach out to Jim Schmidt for a reusable silicone fiberglass reinforced gasket.

[@p--n]

Did you consider fitting a belt primary drive at this point?

[@jessesvintagegarage765]

The Mk3 with a non adjustable transmission isn't a logical solution for a belt drive not to mention nobody makes a Mk3 front belt drive pulley with sprag capability and the reason for that is the sprag and bearings need oiling.