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In the 1950s Lucas changed from Negative Earth to Positive Earth with regard to motorcycle electrics WHY??

There is going to be lots of guesses to this-I can guess better than most, but I want the real answer if anyone might know??

I have a selection of needle jets for my 376 carb, All marked 106 ,some are long, some short ,I think the short ones are meant for the concentric so no good.

Not strictly a Commando only question, but I am hoping any AM26 user might comment.

I've given up trying to get the cover oil tight, the square seals don’t work for me at previous owners have butched the seating groove, so this was my answer, I’ll let you know how it holds up!

I am continually amazed by all the twaddle about saving an ungrateful planet, but, here is my take on it.

I have recently replaced my timing chain, so obviously had to retime the ignition. I set it at 3/4 btdc as stated in the Frank's Manuel. It starts easily, although now it has to be a lot more retarded than before or I get kick-back.

Hi, Has anyone got a pair of valve hairspring compressing tongs for sale or know where I can get a pair? Cheers, Ian.

Hi,

After many false starts, moving house and building a shed I am finally about to start the restoration of my basket case 1966 Jubilee.

A pal has acquired a 1956 Dominator 600 and wants to refurbish the bike. It is a grey colour but he would like it to be painted as close as possible to the original. He has mentioned Rootes Chrysler UK steel grey 397.

hi all,

my front disc brake which has a Norvil conversion feels like wood when applied!

Hi 

Link to "About the NOC Spares" is broken:

https://www.nortonownersclub.org/about-noc-spares-1

Regards

Jerome

Hello,

sadly l think l maybe asking more questions than answering them, l am asking lots of questions, with a view to hopefully buying a Manx, and trying to buy correctly!

About 40 years ago the owner of my 19S decided to over bore it to 85mm and fit a pre-war Triumph T90+40 piston, giving it a capacity of 641cc, a silly compression ratio of near 9:1 and a few other "go faster" mods equally out of character with its

After more help please.  My late 1965 Jubilee has the AMC front forks (square bottom) with mudguard stays locating under the wheel spindle.

Hi all,

Hello all,

New NOC member here and new to the forums too.

I've bought a 1974 850 Mk2A a couple of weeks ago and have been steadily working my way through the (thankfully minor so far) list of snags.

I have recently come across an old Norton gearbox. The number and letters read as:

Gearbox casing N8002 with and E stamped above and on the gearbox cover G5 A 49.

hi i seem to have 2 different cranked top nut spanners, one fits my bike 7/16w, the other has raised letters (gearbox top nut) & is 9 1/16w  , can anyone explain are they both norton ive sent an atatchment, thanks pete

Can anyone identify what threads are used for the screws that hold the switch clusters together and the screws that fix the master cylinder onto the front of the block?

Can anybody please confirm the original height of a 1956 Dominator 99 cylinder barrel ? My barrel has had the spigots removed and the  machined top boss height is minimal and washes out to part of the right hand side top fin.

Are iridium plugs available without resistance built in? I wonder if they have better heat range, so can run hot to keep clean, without damaging themselves? But plugs with suppresors built in are not supposed to be used with a magneto.

Hi,

I am going to replace the rear shocks on my 850 MK1 Commando, rather as a matter of course, not because I know the old ones are definitely unserviceable.

Dear Members,

Diamond Jubilee Machine Badge

Does anyone know who might sell a 7/8" fulcrum clutch lever for a 7/8th handle bar?

My Electra currently has a 1 1/8" fulcrum and is a bit tough to handle for any length of time.

Some may remember my gearbox  was jammed on arrival @  the InCider Rally (which was very good btw!). 

Hello,

How powerfull of these models ? 88 = 29 hp and 99 =  32 hp ?

Now 3 weeks into my Norton Commando ownership i have had my first Slight disaster (if you don't count the kickstart crippling me for a few days as disater!). 

Hi. I removed the various fittings from my basket case Dommie 99 oil tank and found that the filter gauze was lying loose in the bottom of the tank.