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Author Topic: 1975 Norton Commando  (Read 6530 times)

Offline jsedacca

  • Posts: 148
1975 Norton Commando
« on: Oct 15, 2011, 12:52:22 »
Just recently acquired this beauty and plan on restoring it to showroom condition.  It is a MKIII which has the electric starter.  It starts up and rides fine. The previous owner replaced the dual Amals with a single Mikuni VM34, and fitted a Boyer electronic ignition.  The only part that has been restored is the tank.  It has been boiled out and repainted.  First plan of attack is to change all the fluids, clean out the oil tank, and fit the proper mufflers.  After I put some miles on the bike, I'll switch the single Mikuni to dual PWK flatslides from jsmotorsport.com

After a quick wash/polish:


Quick video of the bike running:
http://rides.webshots.com/video/3046175040089932451fzAFtM

Offline joea

  • DTT BOTM WINNER
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Re: 1975 Norton Commando
« Reply #1 on: Oct 15, 2011, 21:32:05 »
i see it has some aftermarket mufflers and low flat bars which look good...they are nice running machines and the single mikuni works really good.....but the pwk's from jrc (knock off keihen) are a great carb too i have sold and used many and they seem to always work well.
 good luck,
joe@ v cycle

Offline John Rebel

  • Posts: 16
Re: 1975 Norton Commando
« Reply #2 on: Oct 15, 2011, 22:20:58 »
You may want to keep that carb.  That switch is the best thing I did to my Comando.  It turned it from a tempremental weekend bike to my daily transportation
Time to stop dreaming and start building

Offline jsedacca

  • Posts: 148
Re: 1975 Norton Commando
« Reply #3 on: Oct 16, 2011, 16:49:58 »
You may want to keep that carb.  That switch is the best thing I did to my Comando.  It turned it from a tempremental weekend bike to my daily transportation

It is a great carb and it runs fine, but it runs out of steam past 5k.  With the dual flat slides, it will pull all the way to redline.

Offline jsedacca

  • Posts: 148
Re: 1975 Norton Commando
« Reply #4 on: Oct 16, 2011, 16:52:07 »
i see it has some aftermarket mufflers and low flat bars which look good...they are nice running machines and the single mikuni works really good.....but the pwk's from jrc (knock off keihen) are a great carb too i have sold and used many and they seem to always work well.
 good luck,
joe@ v cycle

I think the bars are the UK/euro style and the mufflers are being replaced.  They are the wrong size/style and leak so a new pair will be ordered from commandospecialties.com  I just upgraded the battery cables to 4awg to cope with the CNW 4 brush starter. 

Offline CrescentSon

  • Posts: 2423
Re: 1975 Norton Commando
« Reply #5 on: Oct 16, 2011, 18:24:27 »
Looks near showroom now. Gotta love a stock Commando.
"I hated hipsters before it was cool." -Sonreier

"Lifes a bitch when your trying to sell gold bars to beggars" -VonYinzer

"To say that ALL cafe racers are the same degree of ho hum is like saying that finger banging a fisher price piano is on par with listening to Beethoven." -Kanticoy

Offline joea

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Re: 1975 Norton Commando
« Reply #6 on: Oct 16, 2011, 18:30:27 »
 some commando's have a hard time starting using the electric starter even with the cable upgrade.....i kick and push the starter button at the same time if the starter does not spin it fast enough on the initial try...
bars actually look a little wide but you can always cut them down if you want.
joe@vcycle

Offline jsedacca

  • Posts: 148
Re: 1975 Norton Commando
« Reply #7 on: Oct 17, 2011, 23:11:33 »
some commando's have a hard time starting using the electric starter even with the cable upgrade.....i kick and push the starter button at the same time if the starter does not spin it fast enough on the initial try...
bars actually look a little wide but you can always cut them down if you want.
joe@vcycle

Thanks for the tip Joe.  I will look into shortening the bars a bit once everything is back together.  Today I changed the gearbox oil, removed the oil tank and degreased the entire bike.  I also used Gibbs to dress the black portion of the cylinder, and was so impressed, I used it on the remainder of the frame.  This stuff is incredible.  It removes all the dirt/dust/grime and leaves a nice protective sheen which doesn't wipe off or attract dust.  Below is a picture showing the motor after being treated and wiped down.  It removes all the chalkiness which was the main goal without repainting.

Offline jsedacca

  • Posts: 148
Re: 1975 Norton Commando
« Reply #8 on: Oct 19, 2011, 12:30:31 »
Not much of an update, but it is something.  The top side degreasing has been completed and everything wiped down with Gibbs.  In the picture, it shows the area which resides below the battery tray.  It was nasty and grungy.  The Gibbs took it right off and leaves the nice sheen you see, and is not greasy.


I also received the Power-Arc ignition kit from Old Britts.  It should be a nice upgrade from the old Boyer and cannot wait to install it with the PWK flatslide carburetors.  More updates will come later in the week when I get some time off.

Offline jsedacca

  • Posts: 148
Re: 1975 Norton Commando
« Reply #9 on: Oct 25, 2011, 23:31:57 »
Little bit of an update.  I decided to try a new metal polish system.  I bought the blackfire heavy cut and fine cut aluminum polish along with the appropriate wool pads.  The system simply rocks even with the use of a random orbital.  Here is the primary cover after the polishing. 



New billet inspection caps are coming in to replace the gouged up originals.  I hope to have the power-arc ignition wired up tomorrow along with the new PWK flatslide carburetors installed.  Stay tuned for an update.