Newbie with pictures - Combat?

Combat or not you have a nice project there. I see a few nice bits, like the deep finned rocker covers and points cover. Like 'em or not, they tend to sell for quite a bit on Ebay and they are not super easy to find unless your budget for that stuff is deep. It looks like a steel tank, which is another good thing to have.

Even with it being in storage for 30 years, it is nearly impossible to be sure what somebody might have done, even to a low mileage bike. Check for the 932 Amals, look for the "C" on the head, but until you measure the valve lift you won't be sure what cam you have. The Combat inlet valve has a lift of .441 inches compared to .375 for the standard. This is enough difference to make it fairly easy to tell even with a crude dial gauge set up. It can be a bugger to get one set up there but worth the effort if for no other reason because the tappet adjustment is different between the two and you would like to get it right. You could set up a degree wheel and try to measure the at which point in the rotation the inlet and exhaust valves open and close as the Combat cam is quite different from standard. I have not tried it but it would be a good exercise.

Proceed with caution, have fun, and welcome aboard!

Russ

Even his language is different ( I'm French but Ithought English was spoken in the area Hobot lives )

JimC said:

I thought the pistons with the large slot were from the Atlas. I do know the Hepolites with the large slot will separate the crown from the rest of the piston in a Combat. This I know from experience.

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The slotted pistons continued to be used until early 1972.

Interim "Combat" pistons with deeper valve pockets were introduced on Combat models from 200976 (supposedly the first Combat) and "solid" pistons but still with the side slots fitted from 204166.

http://www.norvilmotorcycle.co.uk/techtalk34.htm

Wow! What a warm welcome from everyone! Thank you all for your responses. This is a very active board! I look forward to learning a lot and perhaps someday be able to offer some useful information. Cheers!
Gatsby

Useful pictures are quite adequate for the meantime . :mrgreen: Wonderous contraption , this computor . :? :|

gatsby said:

Wow! What a warm welcome from everyone! Thank you all for your responses. This is a very active board!
Gatsby

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Bunch of old retired guys with nothing better to do that post on the interweb. :mrgreen:

Bunch of old retired guys with nothing better to do that post on the interweb.

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Is that a self-descripition, Dave?

Ddempsey said:

I am also new to the forum. Just bought a 70 commando. I found the bike by accident. A friend is a mechanic in a local bicycle shop and mentioned that one of his co workers might have a Norton. I made contact and the rest, as they say, is history.

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Welcome Dd

Tell us more about your bike and pictures are aways appreciated, especially if asking for advice.
Your location isn't shown so if you update your profile with that info you may find one of us nearby with suggestions for Nortoneering activities.

Bob

JimC said:

Bunch of old retired guys with nothing better to do that post on the interweb.

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Is that a self-descripition, Dave?

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If I were old and retired, then yes. :mrgreen: