Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - JulianS

Pages: 1 2 3 [4] 5 6 ... 37
Twins / Re: A65L Crankshaft welded sludge trap access
« on: 01 November, 2017, 16:51:37 »
Sometimes the sludge build up is so hard it needs a drill or other mechanical means to move it, or so I have found. I would not rely on any solvent to loosen it or the small oil holes in the journal to allow the all effluent to escape.

The plugs were often removed with a hammer and cold chisel which often destroyed them and sometimes resulted in damage to the edges of the hole in the crankweb.

Twins / Re: A10 Pistons
« on: 01 November, 2017, 14:47:27 »
The 7.25;1 should be fine. If you think it too high then you can get a plate to fit between crankcase and cylinder base.

 Other than new old stock Hepolite and BSA you may find it hard to source 6.5:1.The later Golden Flash used the higher ratio. If you are thinking of using the new "hepolite" pistons being widely sold be aware that the rings supplied as standard have a very poor reputation and that some sellers remove them and supply better quality ones.

Twins / Re: A65L Crankshaft welded sludge trap access
« on: 01 November, 2017, 13:30:37 »
I would not advise option 3 - firstly you do not know what is already contained in the sludge trap and secondly you do not know if the oilway from the main bearing journal has not been blocked or restricted by the welding.

Bantam / Re: d14 bushman 1970
« on: 31 October, 2017, 09:05:42 »
Below from the 1969 Bushman parts book may assist.

Singles / Re: B31 gearbox query
« on: 30 October, 2017, 19:29:58 »
Attached service sheet describes the reassembly of the box and may assist.

Singles / Re: B31 gearbox query
« on: 30 October, 2017, 18:44:32 »
Lining up the dots is the usual procedure for the swinging arm gearboxs on the "B" models. The plunger box needing a different appproach.

What sort of box and what year is your bike?

Twins / Re: A65T Fork Slider Length
« on: 30 October, 2017, 13:05:41 »

Twins / Re: How original for an age related plate?
« on: 27 October, 2017, 18:13:19 »

I agree entirely with you.

Twins / Re: How original for an age related plate?
« on: 27 October, 2017, 16:58:12 »
The bike needs to look like a BSA but the colour should not matter, just make sure that the frame number can be read, powder coating, being thick, often obscures part of it.

Parts may need to be refurbished, a wheel might need to be refurbished by fitting a new rim for example. Forks may need to be refurbished due to worn shafts and bushes. I think most bikes going for an age related plate have be refurbished to some extent.

The major parts are the frame, engine/gearbox, forks, wheels and brakes.

Twins / Re: How original for an age related plate?
« on: 27 October, 2017, 15:24:29 »
See the BSAOC website under machine dating;

Also see the DVLA website;

Most of your questions will be answered there.

Singles / Re: Fitting new fuel taps
« on: 25 October, 2017, 22:29:21 »
Dowty washers also useful.

Singles / Re: Fitting new fuel taps
« on: 25 October, 2017, 20:51:11 »
I agree with Bess - it is excellent also easy to apply and easy to remove.

Twins / Re: A65L oil pump woes
« on: 25 October, 2017, 16:54:29 »
Beware grinding paste sticking in the soft zinc alloy.

With the drive being off centre then it will be forcing the toothed wheel into the side of the oil chambers  causing uneven wear.

You can grind away the high spots but you cannot fill in the low spots.

Do you know what caused the original blowup?

Twins / Re: A65L oil pump woes
« on: 24 October, 2017, 15:58:40 »
The stiffness is often experienced with oil pumps, especially the ones made from nasty zinc alloy. Bodies distort and chambers get mishapen and can pick up due to the clamping when assembled onto the crankcase and the material used.

The oil pump is the heart of the engine and has got to be spot on. If you dont want to get the SRM item, which is a first class product, then at least go for the later cast iron one which are much less prone to distortion. They are not cheap either.

Singles / Re: Help please
« on: 22 October, 2017, 20:46:40 »
If the frame number is not in the despatch books then there could be a problem registering it as an old bike. You could end up with a Q and you might need a type approval.

See DVLA website.

However - sometimes owners do not give clubs quite the correct number - misread it (2 for Z, S for 5, Z for 7 and a number of other possibles) or part obscured by paint (especially powder coating). It is worth viewing it and forming an opinion on the number and compare it with the letter and getting an account from current owner. If the number is really odd then I suggest beware.

Do you know what it is? Does it look like it is a proper BSA number?

Pages: 1 2 3 [4] 5 6 ... 37