Oil tank

[andy]

Hi all I have a question/query in which I hope you guys could help me with I'm building a A10 and on the oil tank which is mounted with new rubbers ect but when I came to fit the oil lines the unions are touching up against the frame tube ????? Am I missing sommat or doing anything wrong.
      I have tried turning the battery tray/oil tank bracket both ways.
      Should there be any spacers between said bracket and battery tray.
    Many thanks in advance.
       

[bsa-bill]

If we're talking S/A Andy this from Draganfy's excellent site.

The thickness of the rubber pad that holds the tank from touching the frame down tube (42-8342)  I've found to be a wee bit critical at times

[andy]

yes thanks.......... I should have said its a S/A. I was also thinking that and also its just popped into my head that the unions look rather long and large as the pipes are of a unknown origin......as I don't know if there are different types of unions between makers of said pipes/unions ???

[edboy]

i use thick rubber or foam pipe insulation along the frame tube and squeeze it down with the tank bolt . this helps keep the tank and unions clear of the frame and stops the rubber or foam vibrating out.

[andy]

brilliant just the idea I was looking for 

[chaterlea25]

Hi All,
I have found that the steel spacer tube 42-8331 that fits through the rubber sleeve 42- 8341 on the mounting bolt is very often missing
resulting on the tank being squeezed too tightly towards the frame downtube
In the diagram it looks like the steel sleeve is larger than the rubber one ?? this is not the case
When the assembly is correct the bolt is locked solidly to the oil tank bracket and the rubber sleve is compressed the correct amount to steady the oil tank

This is another example of the "usual faults" found whenn rebuilding A & B models

HTH
John

[1660bob]

Glad it`s not just me then....... Same problem exactly, the oil tank unions are silly close to the frame tube on mine, and the hexagon of the rocker feed locknut had dug a triangular pit in the tube whilst merrily vibrating against it.

I dont think BSA really thought these things out too much/ at all?.It must be the silliest,costliest, most complicated way to do the simplest of jobs, and succeeds only in being er,um, weirdly CR_P! What were they thinking of.......... ?

The  curved ,slotted bracket on the back of my tank itself is welded on too high/low (cant remember which) resulting in it being a mile from anything like reasonable alignment with the front mount assembly........ and the whole sorry, complicated plot finally relies on chunks of rubber  wedged between the frame and the tank.....I`m surprised BSA didn`t just stuff rags in there!!!!!
For years I have puzzled at it thinking,"what have I got wrong" but no, I had it as BSA intended all the time....... The Japanese must have been mystified........Best of luck, Bob C

[KiwiGF]

I think I used 15mm i.d. radiator hose split along its length on the frame tube for my tank....but another method I've used for making nice soft rubber cushions for the frame such as under the tank is to use old inner tubes and glue several layers together to get the exact thickness you want, and to make an even better job of it wrap the rubber pieces around a tube of similar size to the frame when gluing so they have the correct shape as well 

[Butch (cb)]

Glad it`s not just me then....... Same problem exactly, the oil tank unions are silly close to the frame tube on mine, and the hexagon of the rocker feed locknut had dug a triangular pit in the tube whilst merrily vibrating against it.

I dont think BSA really thought these things out too much/ at all?.It must be the silliest,costliest, most complicated way to do the simplest of jobs, and succeeds only in being er,um, weirdly CR_P! What were they thinking of.......... ?

The  curved ,slotted bracket on the back of my tank itself is welded on too high/low (cant remember which) resulting in it being a mile from anything like reasonable alignment with the front mount assembly........ and the whole sorry, complicated plot finally relies on chunks of rubber  wedged between the frame and the tank.....I`m surprised BSA didn`t just stuff rags in there!!!!!
For years I have puzzled at it thinking,"what have I got wrong" but no, I had it as BSA intended all the time....... The Japanese must have been mystified........Best of luck, Bob C

Yeah, it's a wonder that they're still in business.

[Topdad]

I use 22m pipe insulation which works fine .

[Norsa1]

I am still lost on the intent of BSA with regard to the oil tank mounting.  Is it that the intent is to pull the tank against the frame onto a rubber pad to steady the tank? If so, what is the purpose of the spacer (distance piece) and the rubber in the mounting bolt assembly? I don't get it. Why does one need all the spacers and curved washers to secure the tank against the frame downtube.  Also, is the other end of the tank supposed to be rubber mounted?

[RichardL]

Norsa1,

The tank is rubber mounted on both ends. Look at part number 42-8341 in the picture. Part number 42-8342 is called a "buffer". My feeling about BSA's parts lists is that they tended to use the word that best describes the part in proper English.The number one dictionary definition for "buffer" seems to fit well: "any of various devices or pieces of material for reducing shock or damage due to contact". Actually, I am not sure if the tank would pull up against the downtube without the buffer. Never tried it, however, I think there is a good chance of getting close enough to abrade with vibration. I don't think the buffer is actually intended to steady the tank, even if it does some of that job.

Richard L.

[chaterlea25]

Hi,
To add to Richards points
The steel tube fits inside the rubber sleeves, When the bolt is fully tightened  it still leaves the tank sandwiched
and isolated  from the frame between the rubber pieces and the cup the rubber sits into
As Bill said the thickness of the rubber pad needed between the frame and tank back  can vary from one bike to the next
A point to watch out for is that the spacer sleeve  42-8339 that sits inside the frame at the rear mounting often gets lost
Then some over enthuastic Muppet squashes the frame plates inwards overtightening  the bolt

John

[RichardL]

A point to watch out for is that the spacer sleeve  42-8339 that sits inside the frame at the rear mounting often gets lost
Then some over enthuastic Muppet squashes the frame plates inwards overtightening  the bolt

Such a great point. Exactly what had occurred with my A10. I was not the Muppet.

Richard L.

[terryg]

+1.

Tube now replaced.