- Flat bottom tank rubber used between dished washer and frame bracket on oil tanks. (1.250" diameter) - As per A2/278, except fractionally slimmer and inner diameter slightly smaller (boltthru oil tanks used 5/16" rods) - Price is per each
Similar in appearance to the petrol tank rubber doughnuts (Item 0129), these oil tank rubbers have slightly different inner and outer diameters (as normally studs used on oil tanks) and fitted above and below the Norton frame casting that the oil tank sat on. It is not entirely clear from Spare Parts catalogs if all tanks used the same mounting fixtures - but as a rule of thumb, if your oil tank has 5/16" studs retaining it then use these rubbers. If you think your tank used bolts similar to the petrol tank bolts (Item 0124) - which I have seen on some drawings, then use Item 0128. As with petrol tank bottom rubbers, it is normal for the rubber under the oil tank frame mounting to be fitted into a steel cup (Item 0123). Note: over the years I have found it is normally more conveniant to use studs in the oil tank, which aid assembly when fitting. Normally four rubbers are required for each oil tank - two above the frame mounting (between frame and oil tank) and two below the frame mounting.
These rubbers are manufactured specially for RacingNorton and are fuel/oil resistent of a high quality firm rubber, which will not easily break up or soften (which is how most original and pattern ones go eventually).
Note: although not my speciality, I believe these same rubbers were also used on non-Featherbed framed twin Norton oil tanks - i.e. Dominator's