Britbike forum Forums British Motorcycle specific Brands Norton bulletin board Crankcase drain on 70 Roadster?

First need to drain her dry, getting to wet-sumping issue.
My "From 1970" WSM shows both a 'crankcase drain plug' and a 'crankcase gauze strainer' bolt in the routine maintenance section.

I see no crankcase drain plug, so I assume the 1-1/2" gauze strainer bolt acts as the drain point?

Cheers.

Yes.
https://andover-Norton.co.uk/en/shop-drawing/4/engine-crankcases-crankcase-filter-tachometer-drive


Strainer and plug is '850'.
https://andover-Norton.co.uk/en/sho...nkcases-filter-breather-tachometer-drive

(200000+ series 750 had the drain plug but no strainer)
https://andover-Norton.co.uk/en/sho...ases-crankcase-breather-tachometer-drive

The Norton Heavy Twin 500cc and up to 20M3S had the filter type drain. Only the earliest Model 7 (code 12) 1949 had a drain bolt only.

Cheers gents.

The wrench they sell looks wimpy to me. You really need one of these.... that way, the bride can participate. Feet up against the frame rail and have at it.

1D9D0D9A-7A73-4604-B41D-C130061869DD by First Last, on Flickr

It came attached to an Enfield mag that was in a box of stuff that I acquired a few years back. The only Enfield part in there. It’s patiently waiting for me to find an Intercepter. One came up for sale here about 6 months back. Complete and running, so probably should have grabbed it. They don’t seem to come up that often and my basket case situation is already out of control. Used the ring to mount a mag in the mill, so came in handy.

Arrr, that it does matey. More like a beer opening utensil.

I replaced mine with one of these on my 71. Have to drain the sump every so often and I didn't like taking the big plug out.
https://www.classicbritishspares.com/products/06-7281

Good idea.
Thanks htown.