Petrol tank removal

[Phil C]

Thanks AWJDT and Julian. Any comments re the extra washers?

[AWJDThumper]

Having just looked at the parts books again, they are a bit confusing to say the least. The parts book tank picture I originally showed was for a 1965 B40 and seemed to mainly show the original (pre-1961) cylindrical bung arrangement but with the 1961+ shaped bung also shown. However, the 1965 C15 parts book extract bellow gives the proper fixing bolts line up and all the required washers. Not sure why the B40 parts book for 1965 had not been fully updated.

[JulianS]

Be prepared to fettle the parts to fit your bike. New parts often fail to fit as well as we would wish them to.

The below diagram, which shows the earliery tank fixing method does show the position of the washer 29 5655 - which is shown in AJWDThumpers illustration- as being over the bolt but under the frame bracket.

[Phil C]

Yes, I take your point, Julian. So looking at AWJDT's 1965 C15 extract, it appears there is a (plain?) washer below the tank bracket, and one just under the bolt head?   Phil (novice)

[Phil C]

No, sorry, one between the bolt head and the bracket, and one between the bracket and the spacer?  Phil(novice)

[JulianS]

One  either side of the rubber, one either side of frame bracket plus a spring washer under the nut is how I read the books.

[AWJDThumper]

You need large washers either side of the rubber to give sufficient contact area for compression, essentially, between the long spacer underneath the rubber and by the nut above. The small spacer then limits the amount of compression of the rubber before the nut fully tightens down against the two spacers. The extra washer is needed between the frame bracket and the bottom of the long spacer simply to spread the contact area. You could use a modern Nyloc nut above the top large washer or a plain nut and lock washer as per parts diagram.