oil tank variations

I bought a used oil tank off eBay and sent it out for the cNw mod. I did that instead of sending mine out because I don't like the way the cap fits my old tank. The used one was in very nice shape, even had the rear tab intact.

Anyhoo, when I went to install it on my 74 850 I discovered that the spigot for the return line is about 2 inches short.

Were there different part numbers for side mounted tanks, or should they all be the same? I can't imagine why someone would cut that pipe short.

maylar said:

Were there different part numbers for side mounted tanks,

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06-1856 - 1971
06-3090 - 1972-3
06-3975 - 850 Mk2/2A
06-3456 - 850 Mk3 (No chain oiler spigot)

Thanks. Any idea what the differences are?

maylar said:

Any idea what the differences are?

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Except for the 850 Mk3.....no.

Longer hose?

There certainly appears to be 'long' and 'short' pipe variants.
This one is supposedly 06-3456 (Mk3) but it has a spigot.
https://www.ebay.co.uk/itm/NOS-OEM-NORTON-COMMANDO-1971-ON-OIL-TANK-PART-06-3456-/232448208504


https://www.ebay.co.uk/itm/1972-NOR...270467?hash=item4415e784c3:g:wScAAOSwDDRbz7AB


850 Mk3 (06-3456)


Long seem to be 'late'.

swooshdave said:

Longer hose?

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Hose goes to the oil filter which is not a fun thing to mess with. I added an extension using a barbed 3/8 fitting.

I have a box full of slightly differing oil tanks.
oil tank 06-3095? in the 73 parts book ?
Not sure what was going on but there is possibly a hose difference for the 73 850 VS the combat breather 73 750
On this issue I had thought that some tank vent exit tubing therefore had different sizes...but not sure