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#668624 - 09/23/16 2:45 pm Of Dome nuts and pistons? [Re: Kev.]  
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Kev. Online sick
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Royal Berkshire.
Here is a question for the rivet counters amongst you, I ordered some replacement rocker cover dome nuts, as the ones on my bike were a little tarnished (not quite rusty) as you can see below...



but the ones that turned up from the BSA parts people are different, as you can see, but which ones were fitted in 1970?



I also received my new pistons too...



bigt


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



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#668627 - 09/23/16 3:03 pm Re: Of Dome nuts and pistons? [Re: Kev.]  
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gavin eisler Online content
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argyll. scotland, uk
The new dome ones, never seen that nipple type before. radius all sharp edges round valve cutouts and polish tops on piston crowns before fitting.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
#668629 - 09/23/16 3:13 pm Re: Of Dome nuts and pistons? [Re: Kev.]  
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Allan Gill Offline
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Rotherham - S. Yorkshire
Only the centre ones should have been domed. The outer should be normal nuts. That said I have it the other way around deeper nuts in the middle and the nicer looking domed nuts on the outside. They should be 1/4 BSF from memory


beerchug
#668642 - 09/23/16 5:23 pm Re: Of Dome nuts and pistons? [Re: Kev.]  
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Adam M. Online content
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Could you show the inside of these pistons ?

#668647 - 09/23/16 5:53 pm Re: Of Dome nuts and pistons? [Re: Kev.]  
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of course, tomorrow.


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#668847 - 09/25/16 11:47 am Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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A couple of pictures from todays visit to my lockup, first up is the front wheel I picked up yesterday at Shepton jumble, as you can see the brake plate is nice, but the rim is shot, so I think I may well get a new rim fitted when I do the front end change.










Left and Right AMAL 930's, R41, and L42, soon to be heading for the ultrasonic bath.





The old pistons were/are Hepolite's





Back at the last Kempton Jumble, I picked up a nice set of Craven Comet panniers, and an old rack that may well end up being fitted to the Lightning.





beerchug


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#668855 - 09/25/16 12:11 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Morgan aka Admin Online happy
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I see that your carbs are 930/41 and 42
those mumbers was mounted on my A65L 1970 and I was curious what model those carbs was for?
the proper from the books are 930/34 and 35 which is now mounted

above is not a big issue just curious which model 41 and 42 are ment for from the beginning.
cheers
Morgan


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#668860 - 09/25/16 12:59 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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I think you may be putting too much trust in the book, Morgan. There is no reason to believe that your carbs, and my carbs are not original fitment.


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#668873 - 09/25/16 2:20 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Allan Gill Offline
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Rotherham - S. Yorkshire
I had a quick glance and couldn't find reference to the 41 42 carbs. A search on the site didn't show anything up either. John Healy may know better but it's possible that when the extended tickler was released on new carbs that some carbs changed their designation number. It's only a guess though. The fact that you both record having these carb numbers shows that it's 99% possible they were original fitment.

Main thing is you have

#3 slide
2 ring needle with clip in the top slot
106 needle jet
Extended jet holder
180 main jet

Wouldn't do any hard to change all those parts for new and fit premier slides. Firstly though, check that the flange is flat.


beerchug
#668883 - 09/25/16 3:18 pm Re: 1970 Lightning "Y" Bike Project... [Re: Allan Gill]  
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I am going to ask AMAL/Burlen, they have extensive old records, they once told me about an old carb I had on a road rocket that wasn't "in the book" but was factory fitment.

All these old factory records and serial numbers are really only a reference guide, and should not be regarded as set in stone.
bigt


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#669474 - 09/29/16 3:57 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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I sent the head off to SRM this week for full refurbishment, and have also ordered one of their sump plates with magnetic drain plug.

I intend to fit an external oil filter to the bike, and have a choice of two, the standard "Norton" style with screw on filter, and a BSA B25 canister filter, but I can't find a suitable place to fit either? if you have fitted a filter to your A65, could you post a picture of where and how.


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#669521 - 09/30/16 12:04 am Re: Of Dome nuts and pistons? [Re: Kev.]  
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Perth. Wild West Downunder.
Originally Posted By Kev.
Here is a question for the rivet counters amongst you, I ordered some replacement rocker cover dome nuts, as the ones on my bike were a little tarnished (not quite rusty) as you can see below...



but the ones that turned up from the BSA parts people are different, as you can see, but which ones were fitted in 1970?



I also received my new pistons too...



bigt


Those rocker cover nuts look like Norton Commando exhaust rocker cover nuts.


Mark F.
'52 ZB34 Gold Star.
'65 Lightning Rocket.
'74 Roadster Commando.



#669525 - 09/30/16 1:01 am Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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SLO County, CA
The new ones look correct for the inner or top pair.

You'll never see them with the tank on unless you really get down and peek..




Don in Nipomo

#669532 - 09/30/16 2:39 am Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Stuart Online content
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Hi Kev,

Originally Posted By Kev.
external oil filter to the bike, and have a choice of two, the standard "Norton" style with screw on filter, and a BSA B25 canister filter,

You're also aware of the Andy Gregory/Tri-Cor England filter, that uses the a triples' element? Fwiw, I've one of these on my T100, mounted pretty-much as in the picture, the T100 has plenty of space there.

Andy also offers an "oif" version; the inlet is in a different position, rather than there being any functional difference between "pre-OIF" and "OIF".

Hth.

Regards,

#669591 - 09/30/16 4:01 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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I just ordered and received this new SRM magnetic sump plate assembly for the BSA Lightning. The quality is outstanding as I hope you can see from the pictures.

I also sent my head off to SRM to have new valves, guides etc. It is right about now that I hope the bottom end is all ok! everything seems fine but I won’t know for sure until I fire the bike up. A scary thought.



beerchug


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#669670 - 10/01/16 10:47 am Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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It has been a wet day here in the UK, heavy rain on and off all day, so not too much done with the A65, but I did manage to hone out the bores on the barrels, and run the carbs through the ultrasonic tank. maybe if it is dry tomorrow I can get a bit more done.



http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#669765 - 10/02/16 10:56 am Re: Of Dome nuts and pistons? [Re: Adam M.]  
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Kev. Online sick
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Royal Berkshire.
Originally Posted By Adam M.

Could you show the inside of these pistons ?


Out with the old, in with the new...

Old pistons...





and in with the new pistons...





bigt


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#669879 - 10/03/16 12:03 pm Re: Of Dome nuts and pistons? [Re: Kev.]  
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Adam M. Online content
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Mississauga, Ontario.
Thanks Kev, but I thought about the insides of new pistons smile.
They are not relieved like JCC pistons around a gudgeon pin, so being in your shoes I'd check their weight comparing them to originals. I remember some Australian made pistons being much heavier than originals and I personally would avoid those.
Your gudgeon pin's circlips are not my favorite type as well.
Personally I prefer the type without any part of it hanging in the front of a pin, because in this case pin's end holds it in it's place. In the case of your circlips, pin can push it out of it's place hitting it during engine working.
Piston's rings are OK, but you can get Goetze made rings in GB now, which are also cast iron but have a spring for the oil ring and their quality is really high.
They will give you much better oil control than average cast iron rings.
Sorry for mostly negative post - just wanting to save you some pain with BSA in the long run.
Don't take my opinions for granted, I hope the rest of the guys involved with A 65 will comment.

#670123 - 10/05/16 2:08 pm Re: Of Dome nuts and pistons? [Re: Kev.]  
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Kev. Online sick
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Adam not negative at all, the pistons I removed were not the originals as they are +20, are they the same make as original equipment? As for the circlips, I actually prefer this type, these are the same as I use on the Moto Guzzi, and they seem to fit nice and tight.
I never got to weigh the pistons against the ones removed, but as I said it would make little difference as I wouldn't know if those were heavier or lighter than the standard ones.


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#670277 - 10/06/16 2:57 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Pulling it all apart, putting it all together.

I have now for the moment taken the motor as far apart as I intend to go for the time being. I have drained and flushed through the crank cases, and was pleased to find no metal in the drained oil after letting it stand in the tray for a week, and filtering it off over a strong magnet.

The cylinder head has gone off to SRM in Wales for full refurbishment, which includes lead free seats, new guides, valves, springs etc. This work wasn't cheap by any means, but it should last me out, and make for a good top end. I am looking forward to getting the head back so I can button up the top end.

Last weekend I cleaned off all the old base gasket material, and fitted the new pistons, I also honed out and painted the barrels ready to be fitted. I would have fitted the barrels but the supplied base gasket in the kit I bought was for the 1/2" stud version cases and not the 3/8" as required on the later cases, so again I find myself waiting.

Next I turned my attention to the front end and dropped out both fork legs, water had got in through the torn gaiters, and was evident in both legs, water came out of the right hand side, but the left hand stanchion is at the moment seized solid. So I have left it soaking in some penetrating oil for the week, I shall see how it does this weekend.

bigt


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#670334 - 10/07/16 4:05 am Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Stuart Online content
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Hi Kev,

Originally Posted By Kev.
the supplied base gasket in the kit I bought was for the 1/2" stud version cases and not the 3/8" as required on the later cases,

Risking putting my foot in it, I thought 'earlier' cases had 1/4"-dia. barrel base studs? confused

Regards,

#670371 - 10/07/16 1:03 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Kev. Online sick
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I was of course wrong with the stud size, but I was tired when posting


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#670531 - 10/09/16 11:16 am Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Kev. Online sick
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The inside of the new pistons? ok then as you asked...



I called round to see my old friend Terry the Vincent today, just for a cup of tea and a chat, always a good way to lose an hour, and whilst there Terry gifted me an original genuine pair of of AMAL alloy levers, you see lots of new and a few original Doherty versions, but the Doherty's are thicker and straighter in the lever, where the much rarer AMAL version have a slimmer profile, and are flatter where your fingers rest.
These are in great condition with the original stamped clamps, although one lever end has a little road rash.





beerchug bigt


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



#670732 - 10/11/16 6:22 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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Adam M. Online content
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Really envy your ability with the camera Kev.
I'm terrible in this regard.
Anyway difficult to say what these pistons are, I hope not JP - people had problems with them.
I'm just baffled they don't have relief around piston pins.

#671112 - 10/15/16 6:14 pm Re: 1970 Lightning "Y" Bike Project... [Re: Kev.]  
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I am going to sell the whole lower fork assembly including front wheel brake etc, the forks are removed and stripped down and will require new stanchions etc before use, one slider will also need a little work as it has a tight spot which had seized the forks up? the front wheel is in fantastic condition though.


http://kevindean.zenfolio.com/

http://backstreetthunder.wordpress.com/

1950 Vincent Comet
1952 Norton Special
1963 BSA Super Rocket
1970 BSA A65 Lightning
1973 Moto Guzzi Eldorado x2
2009 Triumph Bonneville



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