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Messages - Charles R

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Twins / Re: A65 rebuild
« on: 17 January, 2018, 10:30:26 »
Hi Mitchell

I've got to do similar work on my tank (also an A65).  As well as the chrome & paintwork needing to be completely redone, a dent/crease has to be sorted and I'm missing the right hand tank badge (this is proving difficult to source economically).  The left badge isn't exactly in great condition, so a pair would be very handy.

Regarding the paraffin leak test, heating oil (kerosene, AKA paraffin) is available at around 50p per litre, so shouldn't break the bank particularly if you know someone with an oil boiler.

Good luck with your work.

Cheers, Charles

Twins / Re: Where to fit an external oil filter on my A65L (pre OIF)
« on: 16 January, 2018, 18:15:12 »

I agree that there often isn't enough time, particularly as writing/producing articles takes a long time if it's not your normal business, so hats off to all who contribute.

Cheers, Charles

PS thanks for volunteering Bess

Twins / Re: Where to fit an external oil filter on my A65L (pre OIF)
« on: 16 January, 2018, 00:30:06 »

Great idea to have a technical article from Bess on a subject that is likely to be of interest to many.

It's something I think the magazine is often a bit light on - particularly where worthwhile improvements to the original design are described (benefits & pitfalls!).

This would be of great interest to me as this is my first bike restoration.

Look forward to reading it soon!!

Thanks, Charles

Twins / Re: Where to fit an external oil filter on my A65L (pre OIF)
« on: 15 January, 2018, 12:38:25 »
Hi Bess

Thanks for the photos.  Looks like a similar position to bikerbob's.

It seems to be nicely tucked in but very easy to change the filter cannister (& drain the oil).

Cheers, Charles

Twins / Re: Where to fit an external oil filter on my A65L (pre OIF)
« on: 14 January, 2018, 19:13:51 »
Hi Bob, thanks for the reply.

In a way, "things being in the way" is what I'd like so that the presence of the external filter is as hidden as possible.

Cheers, Charles

Twins / Re: Where to fit an external oil filter on my A65L (pre OIF)
« on: 14 January, 2018, 10:09:35 »
Thanks Bob
I had spotted your photo and it looks like an interesting location.
Have you got any side/other views that would help me visualise it better?
Cheers, Charles

Twins / Re: Where to fit an external oil filter on my A65L (pre OIF)
« on: 13 January, 2018, 08:55:10 »
As my A65 is completely in bits (frame stored in shallow shed loft!), It's a bit difficult to visualise the space available, hence my request for actual A65 conversions.

Behind the side panel (tool box area) certainly looks like a possibility.

Thanks, Charles

Twins / Where to fit an external oil filter on my A65L (pre OIF)
« on: 12 January, 2018, 21:20:59 »
I have bought an external oil filter & holder (as fitted to Nortons I believe - see attached photo with dimensional details).
I'm some way off finishing the engine and refurbishing frame, wheels, well everything really, but I'd like to know where the filter and its holder could be best fitted.  I'd like it hidden from view as much as possible, but still with reasonable access for cartridge replacement.  It'll obviously need a mounting bracket to be specially made for my A65L (1970) pre OIF.

Ideas on best routes for oil pipes and any other fixings also needed.

I know this has been done many times, so I'm looking to short circuit the design loop by getting your help.

Any photos would be much appreciated.

Look forward to seeing some good suggestions!

Cheers, Charles

Twins / Re: A65L Crankshaft welded sludge trap access
« on: 07 November, 2017, 17:51:34 »

I am not intending to do any great or numerous journeys on my A65L (when eventually resuscitated) so that's part of the reasoning for not worrying unduly about the sludge trap.  I'll be very surprised if I manage more than 1000 miles a year - there could be peaks but there'll also be troughs in my use.

I also wonder whether the sludge would be fine enough and in small enough quantities to pass through the crankshaft journals without affecting them, as I would expect the filter to deal with them fairly well as they go round the oil loop.

I suppose I'm looking through rose tinted spectacles and hoping to "cure" the crankshaft block without spending a fortune or tearing out what little hair I've got left.

Hopefully my bike will be back on the road before you are able to report on how much gunge your trap has been filled with!

Thanks again for the help.

Cheers, Charles

Twins / Re: A65L Crankshaft welded sludge trap access
« on: 07 November, 2017, 12:47:40 »

Thanks for your suggestion.

I live quite close to Draganfly so took it to them for their view.  They were very reluctant to commit to how long it would take, but their view was a minimum of 2 hours and no certainty of success in being able to reinstate it.  I could then be back to square "minus one" with a hole in the crankshaft and another one in my pocket!  I know they are quite busy, so it could be that they didn't really want to do it (though they certainly didn't say so)!

I think the answer (as recommended by you) may be to seek out another machine-shop and get their view to see what sort of process they could carry out to get into the sludge trap area to see what's in there  After inspection I could then decide what's best to do regarding making it good again or simply blanking it off (see later).

With an external cartridge filter and frequently changed modern oils, I can't see that a sludge trap would be necessary - but I'm no expert on this matter.  It seems to me that BSA put the sludge trap in the crankshaft to make use of the centrifugal effect to remove the heavier deposits in the oil but only because the filtration system was so poor.  Any thoughts on simply not bothering with the sludge trap after opening the hole to check everything is good and clean inside the crankshaft?

Cheers, Charles

Twins / Re: A65T Fork Slider Length
« on: 07 November, 2017, 12:24:44 »

Before I dismantled the forks I didn't notice any wheel misalignment.  My A65L had done 18,000 miles, but I have no history as to why it was off the road for a number of years before I got it (who knows, it could have been pranged) and reassembled with whatever was to hand.

Unfortunately the dismantling process involved destroying the stanchions as they were so badly corroded!  This means I don't have the stanchions to quickly reassemble the forks to check whether the wheel spindle really does clamp up properly (at right angles to the forks).

Please forgive me asking the obvious, but have you checked the spindle is true?  Is there distortion or looseness in the clamps?  Are the clamping nuts really pulling down fully onto the clamps?  Could a very thin metal shim be placed around the spindle ends to create a better clamp?  The thought of modifying other parts would worry me.

It looks as if a job I've scheduled for later may need to be brought forward - I'm going to have to buy a pair of stanchions and do a "dry" assembly to see what happens to my front end!

Cheers, Charles

Twins / Re: A65T Fork Slider Length
« on: 03 November, 2017, 21:58:33 »

I've got a 1970 BSA A65L (pre oil-in-frame) that has a similar problem:

The right fork outer member (Pt No. 97-3934) is 268mm long (10.54") - this is the one with the brake lug.
The left fork outer member (Pt No. 97-3933) is 272mm long (10.71"), ie 4mm longer.
(Dimensions measured with a steel rule and don't include the end caps.)

The part numbers come from the BSA parts list (00-5707 Aug 1969) but I have no way of telling if that's what I've actually got!

The 4mm difference would try to put the wheel spindle out of alignment.  In practice it would be pulled into alignment when the fork end caps are bolted on.  This would then put slightly different compressions on the fork springs.  This just doesn't sound right.  Id like to know if the discrepancy is acceptable or whether I have a problem (incorrect part from a previous repair?).

Before I dismantled the forks I hadn't noticed anything untoward, though I got the bike as a semi basket case so never saw it in a running state and it could have had all sorts of hidden issues.

The photos shows the offending items, though I could have done a better job on the photos to show more detail!

Is it a coincidence that these outer members have a remarkably similar difference to yours?

Is it anything to do with compensating for the brake forces being taken up by only one of the outer members?

Cheers, Charles

Twins / Re: A65L Crankshaft welded sludge trap access
« on: 02 November, 2017, 17:05:08 »
Thanks Julian

Which thread type?  Whitworth?

Cheers, Charles

Twins / Re: A65L Crankshaft welded sludge trap access
« on: 02 November, 2017, 16:50:12 »
Thank you all for your thoughts.

I would like to drill through and discover what's lurking:
 a. have they left the sludge trap still in there?
 b. is it clean in there?
 c. can the thread be reinstated?  (By the way, anyone know the thread size & type?)

Depending on what's found, ideally I'd like to reinstate the thread and fit a sludge trap plus plug.  Otherwise, as has been mentioned, seal it up again without a sludge trap so as to allow an external cartridge filter to do its job.

Cheers, Charles

Twins / Re: A65L Crankshaft welded sludge trap access
« on: 02 November, 2017, 11:41:36 »

I don't know anyone locally with a floor standing pillar drill or anything approaching it.
I live near Halesworth/Harleston on the Suffolk/Norfolk border.

I'm still intrigued as to why it was welded.  This would have been done about 40 years ago and the motor has never been used since.  Perhaps there was a school of opinion that the sludge trap was not useful if an external filter was fitted but, even so, why weld the hole up?

Cheers, Charles

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