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 ... 28 29 [30] 31 32 ... 63
436
Twins / Re: A65L Crankshaft welded sludge trap access
« on: 02 November, 2017, 17:00:37 »
7/8 x 20tpi.

437
Twins / Re: A65L Crankshaft welded sludge trap access
« on: 02 November, 2017, 12:51:57 »
Even with an external filter there will still be some build up in the sludge trap.

I would think that it was welded as a bodge job, because the original plug was wrecked when removed and/or the face of the crankweb was damaged during removal and/or plug removed by drilling and the threads in the crankshaft were damaged in the process.

The plugs were secured by centre punching the edge and these marks often needed drilling to allow the plug to be unscrewed.

438
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.

439
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.

https://eborbikes.com/index.php?route=product/product&path=62&product_id=60

 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.

440
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.

441
Bantam / Re: d14 bushman 1970
« on: 31 October, 2017, 09:05:42 »
Below from the 1969 Bushman parts book may assist.

442
Singles / Re: B31 gearbox query
« on: 30 October, 2017, 19:29:58 »
Attached service sheet describes the reassembly of the box and may assist.

443
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?

444
Twins / Re: A65T Fork Slider Length
« on: 30 October, 2017, 13:05:41 »

445
Twins / Re: How original for an age related plate?
« on: 27 October, 2017, 18:13:19 »
Chris

I agree entirely with you.

446
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.




447
Twins / Re: How original for an age related plate?
« on: 27 October, 2017, 15:24:29 »
See the BSAOC website under machine dating;


http://www.bsaownersclub.co.uk/machine.html


Also see the DVLA website;

https://www.gov.uk/vehicle-registration

Most of your questions will be answered there.


448
Singles / Re: Fitting new fuel taps
« on: 25 October, 2017, 22:29:21 »
Dowty washers also useful.

449
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.

450
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?

Pages: 1 ... 28 29 [30] 31 32 ... 63