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.

Topics - Spitfighter

Pages: [1]
Twins / A 65 Rebores and re-sleeves
« on: 08 June, 2018, 17:11:26 »
As is evident from my previous postings I have a 1966 BSA A65 and engine rebuild in progress.

The cylinders have already apparently been rebored to +40 thou over standard and now I see that the lower skirts of the sleeves have been broken and repaired. Cracks are still visible but the engine appears to have been run (successfully?) with the repair in place.

Plan A was that I had been going to have the engine bored out to +60 but now I see this repair more closely I begin to doubt whether that would be sensible given the uncertainty about the repair, especially if reground.

Plan B would be to have the barrel re-sleeved and taken back to standard and go from there but some earlier enquiries elsewhere drew a blank on new sleeves apart from expensive ones from the USA or some UK ones that needed trimming somehow.

Can anyone advise and help on either Plan A or B or even your own suggested plan C, any idea of costs of them and who could do such work?

I am based in North Yorkshire so northern recommendations could be very helpful.

I have also asked PES from South Yorks who advertise in the BSAOC mag the same question but they seem to have gone home for the weekend so I have had to email them. (Is this reasonable for a Friday when some of us are just getting focussed on our tasks for the weekend??  ;) )


Twins / A65 '66 Spitfire Gearbox main bearing
« on: 23 May, 2018, 15:58:35 »
I am stripping the engine and replacing various bits and bearings in my '66 Spitfire.

The parts list specifies part number as 68-0023 for gearbox main drive shaft bearing. I have now ordered two replacements from reputable people who list them as 68 0023s but neither match the one removed. (The casing is numbered as coming out of the factory in 1966 and both halves have matched numbers).

The one removed (labelled Hoffman England N241 V2) and has an id of 1.250 and od of 2.5"
The first "replacement' (marked RL59 2RS) has an id of 1.120" and 2.5" od.
The next one (marked 1654RS) and has an id of 1.25" and od 2.56".

Is there something I should know before I ask someone to replace the bearing with one according to measurements and not just a part number (or to correct their listings)?

The other question I have is about the fact that the two replacements are sealed and the "original" open.

Given it would be in the gearbox and hopefully in some oil, is the sealing a help, hinderance, or just irrelevant in this environment?



Twins / QD hub bearing on A65
« on: 03 March, 2018, 15:44:28 »
Iím fettling the rear hub of my 66 spitfire and having a slight problem with the bearing for the brake drum. According to my parts book it should be the same size as the two bearings in the wheel but it seems to need to be about 40+ Thou bigger otherwise it is loose. I have a bearing with the right external diameter but incorrect inner and another (which matches the wheel bearings) with the right id and wrong od. So far my workshop manual, parts book and Roy Bacon book have not helped. Any suggestions?

Twins / How original for an age related plate?
« on: 27 October, 2017, 15:06:40 »
I have recently acquired a reimported Spitfire. It was in "barn find" condition only the barn itself had probably had holes in the roof. I am beginning the business of stripping down and rebuilding and would obviously like an age related plate at the end of the work. (I have read the thread on getting through that process...).
Although the advice is that
1. key components have to be original (I think mine are) but how long is that list and what exactly is on it?
2. there is some latitude for replacement of worn and damaged bits, (how much?) and
3. there is some latitude for "cosmetic" changes. 
What is the experience out there of how these criteria have actually been applied?
I have in mind a number of options for the rebuild, all of which would preserve the integrity of the original frame, the engine and forks, but would I incur problems if I did something like paint the frame a different colour than black, or some other technically reversible thing?

Pages: [1]