The BSA A7-A10 Forum

Technical => A7 & A10 Engine => Topic started by: Duncan R on 19.08. 2010 09:51

Title: Bike out of storage after 9 years
Post by: Duncan R on 19.08. 2010 09:51
Hello all,

I have not posted for sometime - My shooting star has been in storage in my friends garage for the last 9 years as I have been working overseas. Last weekend we dragged it out of the garage,it had been stored in a vac bag. I was expecting a pile of rust but to my amazement all was well,it came out in the same condition as it went in ! We couldn't resist trying to start it,so after puting some oil in I gave it a try. Despite the 9 year old petrol it actually fired up!! and even idled quite well. I now need to return with a van and get it home and give it a good service and get a MOT.

I read an article on magnetos that stated that mags go off if left standing for a long period, my one was reconned about 6 months before it went into storage and it seems to still have a nice fat blue spark,is this likley to fail due to the long storage period?
Title: Re: Bike out of storage after 9 years
Post by: iansoady on 19.08. 2010 10:25
I believe the problem arises with mags when they are damp and the shellac on the windings starts to go off. As yours has been stored in a vac bag hopefully it'll be OK.
Title: Re: Bike out of storage after 9 years
Post by: lawnmowerman on 19.08. 2010 10:26
Hi Duncan. The vac bag was a great idea and seems to have done the trick. It may be that the lack of ventilation has stopped the petrol evaporating and leaving residue to gum everything up. It may have also stopped damp getting in the mag and the lack of oxygen means no oxidisation on bike tinware. alloy and chrome.. Providing it went in the bag on a dry day you would not have locked any humidity in there.
The only problem you may have with the mag is the loss of magnetism in the permanent magnet which decays over time but I am no expert on mags and there are many topics on that subject on this site. If it works ok then I am a great believer in the old adage "if it 'aint broke - don't fix it."

Good luck with the MOT - you still have a month or two to enjoy riding her before the crap weather sets in.

PS. Don't forget that crash helmets degrade over time if you have not ridden since putting the bike in storage - may be time to invest in a new one.


Jim
Title: Re: Bike out of storage after 9 years
Post by: Duncan R on 19.08. 2010 10:48
Thanks for your replies - I suppose the best thing to do is just ride it and it see what happens (after a compleate check over and service) Jim - Thanks for the note on helmets, I have been riding modern stuff whilst away and have a fairly new helmet. I think a new set of tyres are also in order,they look ok but must pretty shot by now. Any recomendations for tyres? I was thinking a set of Avon SMs, the current ones are Indian copies of SMs and were rubbish when new! The bike is a re-import from India by the way,thats why I was surprised the chrome stayed intact. I am planning to do an engine rebuild over the winter and have accumalated a lot of parts over the last year or so, the engine runs quite nice but there is not much meat left on the crank journal due to the ammount of regrinds its had. It has a M20 single spring clutch on it which works ok but needs some attention,also the charging system needs sorting.
Title: Re: Bike out of storage after 9 years
Post by: A10Boy on 19.08. 2010 11:06
If you're not planning to ride it like Barry Sheene Avon SM's are fine. [other tyres are available].

I think the mag will be fine, long term storage is no different than having a spare mag on the shelf for yonks, and a good one always seems to survive intact.

As far as the crank journal is concerned, they dont need a full 10 Thou regrind, usually just enough to clean it up. You can have a lead bronze bush made to suit whatever undersize you want. I have them made by mike email, mike_jan@dsl.pipex.com he does a good one for around £35. If the crank is too far worn you can get them of ebay for a reasonable price [small journal].

Good luck with it.
Title: Re: Bike out of storage after 9 years
Post by: brackenfel on 19.08. 2010 18:38
Hi Duncan,
Interesting to hear about the Vac Bag - my bikes sweat something awful in the garage if there is a sudden change of temperature so I might try one..

As for tyres - I'm going to stir it up a bit here but I really don't like Avon SMs..... *eek* 

I do like Avons however & have a variety of the AM series fitted to my bikes.. Not fitted yet but I have a pair of Roadriders ready to go on the A10.. Have fitted them to the Lav 750SF1 & they're very good on that... They have a modern profile not to everyone's taste but the handling is excellent & they seem to wear well too.
Cheers,
Adrian
Title: Re: Bike out of storage after 9 years
Post by: Duncan R on 19.08. 2010 19:04
Thanks A10boy for the crank info - I think I will run it till it starts rumbling, I only toodle around my local country lanes but I would like to take it on longer runs eventually.

brakenfel, the bag didn't hold it's vacum for 9 years(didn't expect it to) and my friend had built up quite a bit of junk around the bike during the nine years. I think you can leave them for a long time though, they also give you a huge bag of silica gel and a humidity gauge so you can keep an eye on it. I think I might go for the AM Avons as rideability is more important to me than looks (bike is far from concours anyway!)

Regards

Duncan

Title: Re: Bike out of storage after 9 years
Post by: A10Boy on 20.08. 2010 09:46
Duncan

Warning dont wait till it starts rumbling, if you have significant play in the bush you will be loosing oil pressure to the big ends. A little play is normal but if you cam move the crank by more than a few thou this will be a problem. You might find a con rod sticking out of the crankcases before you hear any rumbles !!!!!!!!

Title: Re: Bike out of storage after 9 years
Post by: LJ. on 20.08. 2010 11:33
That really surprises me and amuses me to hear that your A10 has an M20 single spring clutch! A year or so ago I was enquiring on the M20 forum if it was possible to fit a single spring clutch and seems now you have given me the answer. How doe's it hold? is there any slip? I'm not needing to fit my single spring now as I had eventually come by a four spring jobbie but it would have been an interesting experiment, it's a supposedly a very good clutch but then... the M20 is much more underpowered than an A10.

I'll go along with Adrian's feelings about the Avon SM. I came off my Star Twin because of a combination of tyre age, road surface and the squareness of the tyre itself. Did a bit of a write up about the 'off' http://www.ljswain.btinternet.co.uk/come-off.htm I do still have the Avon SM fitted to the rear of my Red A10 because it is a stronger tyre for carrying heavy loads i.e. all the camping gear & pillion etc, but on the Blue A10 I'm happily using Dunlop TT100's.
Title: Re: Bike out of storage after 9 years
Post by: Duncan R on 20.08. 2010 13:08
Hi A10 Boy,

I won't let it go that far - it went before in India, I am not sure if the bush that replaced it is the correct material but it has done a couple of thousand miles and all seems well. That was the trouble in India, the knowledge and skill was there but the correct materials/parts were not always available. I managed to get hold of a nice crank off E-bay last year and also a set of rods. I plan to get a proper bottom end rebuild done to give me more confidence in the motor. It looks like it has thrown a rod at sometime in it's tough life - amazing bit of welding on the crankcase though!

Hi LJ - I never had any slip on it but it used to drag when hot but that was in the extreme heat in Dehli traffic, it seems to be ok in our milder climate. The action is quite heavy, I need to strip it down and have a look at the plates,I took it off once without the spring compressor not realiasing how much force is behind that spring! :o luckily I was not standing in front of it, I have now ordered a spring compressor. There were tons of M20s in India but not many twins, I assume thats why it was fitted due to the lack of availability of spares for originals - I will try and send you a photo when I strip it down. Thanks for tyre info - I think I will try the TT100s

Regards
Duncan
Title: Re: Bike out of storage after 9 years
Post by: mike667 on 20.08. 2010 14:03

As for tyres - I'm going to stir it up a bit here but I really don't like Avon SMs..... *eek* 

I do like Avons however & have a variety of the AM series fitted to my bikes.. Not fitted yet but I have a pair of Roadriders ready to go on the A10.. Have fitted them to the Lav 750SF1 & they're very good on that... They have a modern profile not to everyone's taste but the handling is excellent & they seem to wear well too.
Cheers,
Adrian

 i have the avon Am26 (roadriders) fitted to my A10 and my 61 triumph and find them much more confidence inspiring than  the ole sytle pattern tires. the only i have compliant about the AM26's, and a minor one is that they are low profile compared to the vintage style so there is more of a gap between fender and tire

 adrian -  can you post a pic of your SF1? - i have a triple laverda and love the SF1's too

mike
Title: Re: Bike out of storage after 9 years
Post by: muskrat on 20.08. 2010 14:36
Interesting Mike, just fitted AM26's to the cafe yesterday. Only did 30 miles today, but they feel sooo good. 100/90 19 front, 110/90 18 rear.
Cheers
Title: Re: Bike out of storage after 9 years
Post by: mike667 on 20.08. 2010 15:55
Interesting Mike, just fitted AM26's to the cafe yesterday. Only did 30 miles today, but they feel sooo good. 100/90 19 front, 110/90 18 rear.
Cheers

Nice, you'll love 'em Muskrat  -  i have 19" on the A10 so its 90/90 front and 110/90 back - on triumph it has 18" and i went 100/90 front and 110/90 rear. So far the best tire i have found in 19", i find myself frequently rubbing the toes on th pavement in corners

  -  have them on my commando too since the super venoms are no longer being made, they are equal to the SV's but not sure about better?!

m
Title: Re: Bike out of storage after 9 years
Post by: brackenfel on 20.08. 2010 18:44
Hi Mike,
Pics as requested - which Triple do you own??
Am not sure where the photos will appear in this post (I really must read the "help" screens again!)

Apologies in advance for this not being an A10.... It does wear the AM26's being discussed though...
Have just finished another swearing session trying to get the A10 gearbox back together - hopefully I'll get all 4 gears this time ( having problems despite everything seemingly correctly fitted, selector plate in neutral, dots lined up etc...)



Cheers,

Adrian
Title: Re: Bike out of storage after 9 years
Post by: bsa-bill on 20.08. 2010 19:03
Got these AM26's on the Project - don't yet feel qualified to comment having covered a whole 2 miles  *lol*   but it did feel safe on all four turnarounds  *smil*

Adrian  - my gearbox needed to be one dot out (if that makes sense to you) to get all four gears, I think there's further reading about this in the Forum if you do a search
Title: Re: Bike out of storage after 9 years
Post by: mike667 on 21.08. 2010 12:21
Hi Mike,
Pics as requested - which Triple do you own??
Am not sure where the photos will appear in this post (I really must read the "help" screens again!)

Apologies in advance for this not being an A10.... It does wear the AM26's being discussed though...
Have just finished another swearing session trying to get the A10 gearbox back together - hopefully I'll get all 4 gears this time ( having problems despite everything seemingly correctly fitted, selector plate in neutral, dots lined up etc...)



Cheers,

Adrian


Beautiful Adrian! damn i love those 750's - i like the blue mucho
 i have a 78 1200 -  a lovely bike but doesn't get ridden enough, its like's open roads and around here there are little
apologies for non-A10 related, that being said today is the start of replacing the steering bearings and forkseals + progressive spring upgrade w/ the fancy dow dampers - hopefully not to much of a cluster"f to do..

(http://i129.photobucket.com/albums/p208/mikegray660/DSCN1050.jpg)
Title: Re: Bike out of storage after 9 years
Post by: brackenfel on 21.08. 2010 17:17
Hi Mike,
That looks lovely, in great condition too...  Mine's a US bike, reimported by a guy who imported brit bikes from the states & did them up for a living (stored in a huge vac bag that held a dozen bikes , within a warehouse!). He bought the Lav for himself, then bought a Harley Night somethingorother & then got a new girlfriend.. He claimed he needed the cash for the Harley...  *smile* . The bike has just turned 5500 miles from new & apart from the clutch cable, carb needles (corroded when the bike had stood for so long), tyres & 2 chain adjuster bolts is totally original..

Bill - thanks for the thought, yes I do understand what you mean but have finally (after a HUGE amount of bad language!) managed to get all 4 gears with the dots kind of lined up. The difference between neutral & first (or second) is smaller than I imagined...
Just waiting now to see what the next problem will be as this A10 has been a real pain to sort.. It'll have to watch it as the B33 is waiting in the wings and so far has been a whole lot less trouble... It needs tyres too so if the A10 pushes it's luck too far the AM26's will go on the B33!!
I've got 90/90 x 19 front & 100/90 x 19 for the rear .. Is 110/90 not a bit large for a standard A10 rim? If they'll fit I could always buy one for the A10 & fit the 100/90 to the B33...

Cheers,
Adrian
Title: Re: Bike out of storage after 9 years
Post by: muskrat on 21.08. 2010 21:55
G'day Adrian,
                      Luv the Lav, never seen a blue one.
I have wider rims than std, WM3 = 2.15" so I could use 110 on front and 130 on rear when racing. But in saying that I have just ordered a 110 for the '51 rear with a WM2 rim.
Cheers
Title: Re: Bike out of storage after 9 years
Post by: cotterpinkid on 22.08. 2010 06:07
Hi Duncan,

Bit of a late post on this one, but I recently dragged my A10 out after 10 years. The mag. was completely rebuilt just before I put the machine up (new armature, bearings etc). I fetched it off and had it tested and although it gave a spark at the plug, when the armature was removed and tested you could see sparks flying all over the windings i.e. the insulation had broken down whilst the machine had been stood. Not saying that this ould be the case for your mag., but it's worth bearing in mind if you have ignition problems.

Brian
Title: Re: Bike out of storage after 9 years
Post by: Duncan R on 22.08. 2010 13:55
Hi Brian,

Thanks for your post. I will just have to give it go and see what happens. Got a load of stuff to do on the bike then I will take it for a lot of local runs an get it nice and hot.

Cheers

Duncan