Norton N15CS Hybrid restoration

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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Tue Dec 08, 2009 10:01 am

Timed breather disc & spring arrived yesterday-

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Installed cam & crank, nipped up case halves-

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Re: Norton N15CS Hybrid restoration

Postby Cookie » Wed Dec 09, 2009 4:14 pm

I happened to run into a piece on the hybrids that covers removing the head in the frame.




All these first machines went to Berliner, the main distributor in the USA. There must have been quite a hectic rush at the factory to get the scramblers built because there were a few 'oversights' on the first batches. One was that it was impossible to remove the cylinder head in situ because even when the exhaust rocker spindles were extracted there still was not enough clearance between the top frame tube, to tilt the head back and withdraw the push rods because the three cylinder head studs were about 1/8" too long, necessitating lowering of the engine. These studs were shortened on all subsequent Atlas engines.
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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Mon Dec 14, 2009 5:09 pm

Cylinders properly repainted in Silver-

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Re-installing the valves in the rebuilt head-

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Lovely, just lovely-

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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Mon Dec 14, 2009 5:11 pm

Rockers all re-installed, head is done.

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Re: Norton N15CS Hybrid restoration

Postby Cookie » Mon Dec 14, 2009 5:20 pm

Now comes the good part!
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Re: Norton N15CS Hybrid restoration

Postby Rob94010 » Mon Dec 14, 2009 10:16 pm

When assembling a Norton head, You leave it bare metal?
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Re: Norton N15CS Hybrid restoration

Postby Scruff » Mon Dec 14, 2009 10:53 pm

My 1969 Fastback head was unpainted from the factory.
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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Tue Dec 15, 2009 8:07 am

Yes, the aluminum head is always bare.
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Re: Norton N15CS Hybrid restoration

Postby ludwig » Tue Dec 15, 2009 8:37 am

and the barrels on N15s where always black .
Remember the rules ..
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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Tue Dec 15, 2009 9:13 am

HUH?

DOH!

It WAS Silver, but SHOULD BE Black, correct.

Oh well, keeps me busy while I wait for the CORRECT layshaft top gear to arrive (received another Commando spec bit which I already have one of.
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Re: Norton N15CS Hybrid restoration

Postby Cookie » Tue Dec 15, 2009 10:00 am

Not that an N15 CSR is anything to go by, but my head was unpainted and my barrels were black.
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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Tue Dec 15, 2009 10:33 am

Decided to go with a stud at the 9 o'clock position, and I'll secure the 2 other screws with locktite stud lock.

Also dabbed some JB Weld into the 2 bearing removal holes, will dress it all up after it cures.

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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Tue Dec 22, 2009 10:15 am

Round 2 of the new parts (cycle parts) started arriving last night...

Pipes, rubber bits, fork bushings, ammeter, fork top nuts, oil tank cap, oil level decal.

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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Thu Dec 24, 2009 2:23 pm

More new stuff-

Washers, o-rings, wiring harness, fork seals, start capacitor, tail lamp, and the CORRECT layshaft top gear. Now the trany and finally go back together.

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Handlebars, fork stanchion tubes, clutch lever assy, gas tank badges, speedo cable, cush rubber set, bulb, warming light, "Reserve" decal, "Oil recommendation" decal.

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Re: Norton N15CS Hybrid restoration

Postby grandpaul » Thu Dec 24, 2009 2:53 pm

Slipped my mind, but the pipes will be swapped for a set of P11 spec upswept headers...
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