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650ss alloy barrels

Norton Models (not Commando or P11)

Re: 650ss alloy barrels

Postby wilkey113 » Sun Mar 26, 2017 7:25 am

Maybe this photo will help.
I shot a photo of the Norman White cylinder, next to my stock 650 cylinder, and put numbers next to all the holes.
The numbers in Pink, are the standard holes for all 650 cylinders. The numbers in Green, are shown on the Norman White cylinder only, and those are the recessed thru bolt holes for the Commando style thru bolts.

Photo here (sorry, I don't know how to post the photo in this thread):

http://i1228.photobucket.com/albums/ee4 ... gnpr08.png

On the photos, the Pink numbers 2, 5, 9 are thru holes for the studs that come out of the head.
All other Pink numbers, are the threaded holes. (Total of 10 holes which are standard Norton pattern - either threaded holes or thru holes)

Any hole that's not number is either the oil drain hole, a pushrod tunnel, or the holes for the pistons.

Hope this helps.

wilkey113
Posts: 446
Joined: Thu May 06, 2010 9:46 pm

Re: 650ss alloy barrels

Postby Rohan » Sun Mar 26, 2017 10:13 am

So those 4 additional through-bolts (holes) all pick up the locations for the studs into the crankcases
directly underneath, in the same way the 850 cylinders do....
Comprendez.

Rohan
Posts: 8068
Joined: Thu Aug 26, 2010 5:30 pm

Re: 650ss alloy barrels

Postby wilkey113 » Sun Mar 26, 2017 2:15 pm

That's correct.

It's a nice piece of kit, and the weight savings is quite drastic. With the thru bolts, it should be very nice. I read an old article about a Norman White prepared 650ss, and it apparently went like a scalded ape.

wilkey113
Posts: 446
Joined: Thu May 06, 2010 9:46 pm

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