M10 DOME Cylinder NUTS HEX

[AshimotoK0]

Seems very big Ash, not like Honda at all.

Live and learn Goldie, live and learn.

Here is a pic of a friends 2.5k mile, totally unmolested, UK market, 1966 Bomber ... note the large cap nut on the shock top !

Mo or is it Goldie?     here is a link to original Bomber pics .. nice reference for you.

https://www.dropbox.com/home/Micks%20Crawley%20Bomber%202.5kMiles


[ Guests cannot view attachments ]

[Oddjob]

Doesn't look as nice as the 500 upper mount nut though does it?

I think as time went on Honda started to tidy things up, make them more modern looking. Just my theory.

[AshimotoK0]

Doesn't look as nice as the 500 upper mount nut though does it?

I think as time went on Honda started to tidy things up, make them more modern looking. Just my theory.

You desperately need to get a 60's Honda mate 
 
Isn't 17mm A/F the industry standard for a normal M10 nut?

Those big nuts looked the dogs b*llocks on my 1950's Silver Cross Pram.

[Oddjob]

I’ll pass Ash, anything pre 1967 I’m not interested in, they just don’t float my boat. Whilst I can appreciate them for what they are, I’m just think they look dated, like something pre war, like everyone couldn’t let go of an idea of how things were supposed to look. It was the introduction of the 750 that changed the game, the 500 refined that image, the Z1 took it another step further. To me that’s the golden age of motorcycle design, when they went monoshock is where I draw the line.

17mm may be the standard size but not for the Japs after they changed from JIS to the modified JIS, I think that made them look again at stuff like spanner sizes for nuts, 12mm for M8 threads, although firms like Yamaha and some others liked 13mm better, I think Honda looked at stuff like that and thought, let’s make it easier to identify the bolt size, why have M10 and M12 as 17mm AF, let’s make M10 14mm AF instead to differentiate them. Just my theory of course.

[mo goldie]

Hi Ash

Yes Mo is fine mate.

and they are the ones that I have got on my black Bomber too...... and thanks for your help he don`t apricate the old bikes ha.......the goldie bit comes from My Bsa RGS plus the others lol.

Cheers Mo

[AshimotoK0]

I found a Black Bomber original 17mm AF dome nut and it fits both a 1971 CB500K0 frame and a 1964 CB72 Frame so pretty sure original was M10x1.25 Mo and this tallies with the 1967 Honda threads Service Bulletin  (i.e thread pitch was unchanged after 1967 but AF reduced from 17mm to 14mm). So a bit of a mystery why yours is 1.5mm pitch. But hey-ho if it fastens up OK then all fine.

[mo goldie]

well what can I say but the new Nuts turned up today and yes indeed they are M10 1.25 pitch thread and A/F 17mm
and all on and looks great Now so well chuffed.

cheers all

Mo

[Oddjob]

So ling as you’re happy, that’s all that matters.

[mo goldie]

oh one more thing just to ask anyone........ there is a small amount of play in the swinging arm, I packed in some more Grease via the grease nipple but made no difference ...is there meant to be any play at all or is a bit ok ?
 

[Oddjob]

No play, even a small click can make it fail an MOT or at least get an advisory.

[AshimotoK0]

oh one more thing just to ask anyone........ there is a small amount of play in the swinging arm, I packed in some more Grease via the grease nipple but made no difference ...is there meant to be any play at all or is a bit ok ?

By sheer coincidence on my FB listed this week: This is usually worn and you may need bushes as well. Not sure if anyone one makes in bronze... Trigger or Julie may know?

[ Guests cannot view attachments ]

[Bryanj]

Any play is too much, snap up the collar as it wears more than the plastic bushes

[Oddjob]

I wonder if you could get stuff like the collar hard chromed? I've got a couple of ruined ones from the 500/550.

[AshimotoK0]

I wonder if you could get stuff like the collar hard chromed? I've got a couple of ruined ones from the 500/550.

Would probably  cost more than my NOS one is up for grabs for     But agree if no NOS around it may be an option.

[Bryanj]

Many years ago i had the ends of one turned down and thin sleeves put on, couldnt do the grooves and the man that machined it said it wasnt hard at all