Newbie but oldie

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Jan 27, 2021
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Hello all,

First let me thank you for this forum! What a resource!!!

I have a 1975 MKIII that I haven't ridden since 1989 and would like to at least get it running. It was stored for many years in my airplane hanger which would get quite humid in the spring. It has always turned over OK.So far, I've cleaned it up a bit, pulled the plugs & fogged the cylinders and many other things with Sea Foam deep creep.
I've forgotten many things over the years:
-I can't get the seat lock to unlatch but don't remember, was it keyed the same as the ignition, or is there a separate key?

-I have some electrical skills, remember that the bike is positive earth, so just to check preliminary response I checked some basic things with my multimeter to rule out major short circuits. When there were none, I connected my battery charger properly just to see if the horn would work etc. There was basically zero current draw no matter what switches I tried. Any suggestions where I should start looking?

-Has anyone had any luck with new gas tank sold on ebay from India?

Thanks so much for any and all help!

Newbie Randy
 

grandpaul

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Battery is dead, more than likely.

You'll want to do an oil change, for sure (with filter). Engine, transmission, primary chaincase, and forks.

Carbs will need to come off and have a good soak in a gallon can of Berryman's Chem-Dip (leave the can in the sun a while to warm it up, AFTER cracking the lid open). Dismantle one at a time, don't mix up the parts.

Some tanks from India are good, some are NOT! If you can't find good enough answers in the SEARCH feature (top right), ask that question specifically (in a new thread) to get the most visibility and valid replies.

Worst case, use the leftover Berryman's sloshing around in the tank (after you do the carbs), then flush REALLY WELL with some cheap gas, let dry in the sun (again, if you have any of that)

Different key on the seat I THINK (don't remember either).

Welcome, and get with it!

P.S. What's in your hangar?
 

gortnipper

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Welcome Randy.

I left my bike in a big steel shed with concrete floor here in NZ for 10 years, unridden and unstarted. Pretty humid and about 15klicks to the sea. One of the cylinder walls had pitted in contact with the rings, and was lucky that a +.040 job on it worked ok. So, you may want to get one of those cheap USB driven boroscopes to put down the plug hole and look around.

Make sure you check this out - https://www.accessnorton.com/NortonCommando/technical-information.2265/

The book we all wish we had when we started has just been published.

Norton Spare Parts - Genuine Norton Parts - Norton Motor - Norton Motorcycle - Norton Commando

Also available on Amazon and ePay,
 

L.A.B.

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I can't get the seat lock to unlatch but don't remember, was it keyed the same as the ignition, or is there a separate key?

The seat lock key is different.

-I have some electrical skills, remember that the bike is positive earth, so just to check preliminary response I checked some basic things with my multimeter to rule out major short circuits. When there were none, I connected my battery charger properly just to see if the horn would work etc. There was basically zero current draw no matter what switches I tried. Any suggestions where I should start looking?

Difficult to say without more detailed information.

Power (brown/blue, NU) should be reaching the ignition switch (Terminal 1) from battery (-).

With the ignition key at 'Ignition only', the switch should connect NU-W.
At 'Ignition and Lights', NU-W-NG-UY.
At 'Parking with lights' NU-NG.






-Has anyone had any luck with new gas tank sold on ebay from India?

Roadster Hi-Rider or Interstate? If Roadster then the popular choice is Emgo (Taiwan).
 

YING

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Buying a tank from India is a crap shoot. I bought one and after much re-working it works and has stayed good for 3 years. I would not do it again but other people may have had a better experience. I went round and round with the vendor to no avail.The Emgo Roadster tank have received some positive reviews.Just my 2 cents
Mike
 
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