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Need Help with BSA Shooting Star #735174
05/13/18 11:58 pm
05/13/18 11:58 pm
Joined: Feb 2018
Posts: 8
Honey Brook Pa
M
myshootingstar68 Offline OP
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myshootingstar68  Offline OP
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Joined: Feb 2018
Posts: 8
Honey Brook Pa
Hi Everyone,

I am the original owner of a 1968 BSA Shooting star. In the 50 years I owned it (10K miles), it has only not started twice, the last time being a loose battery connection was fifteen years ago. Two weeks ago, I went to start it and nothing. I tickled the carb three to four times as usual and some gas spit out and then I kicked it over but it was quiet. Batter is fully charged, headlights and horn operating. I think its the ignition system. I flicked the points open while the ignition was on and according to the Chilton manual I have, if there is a spark the condensor is bad so I replace it but the points still spark and no start. I put the HT wire with spark plug 1/16 th from the cylinder head and there is a spark (not a big zap) and the points don't look bad...sandpapered them a bit...the gap is .15 so I would appreciate any help in diagnosing why it's not starting.

Thanks,

Johnny

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Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735183
05/14/18 1:52 am
05/14/18 1:52 am
Joined: Jun 2002
Posts: 925
Jaffrey, NH, USA
Peter Quick Offline

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Peter Quick  Offline

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Joined: Jun 2002
Posts: 925
Jaffrey, NH, USA
Clogged pilot jet I'd guess.

Peter


check out: www.bsaunitsingles.com
2500 BSA part numbers with inventory in stock just for the unit singles!
Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735185
05/14/18 1:56 am
05/14/18 1:56 am
Joined: Oct 2001
Posts: 1,129
Sydney, Oz
S
Shane in Oz Offline
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Shane in Oz  Offline
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S
Joined: Oct 2001
Posts: 1,129
Sydney, Oz
Have you changed the spark plug? Modern fuels (at least here in Aus) are conductive, so if the plug gets too wet it can leak to earth before a decent spark forms. Drying the plug doesn't help much, either. I've had this happen on A65s a few times.
Often, if you start the bike and let it warm up with a new plug, the old one will work if you put it back in.

This is similar to the good old days when you started a racing 2 stroke on a hot plug and warmed it up, then put a cold plug in for the race.

Re: Need Help with BSA Shooting Star [Re: Peter Quick] #735187
05/14/18 2:09 am
05/14/18 2:09 am
Joined: Feb 2018
Posts: 8
Honey Brook Pa
M
myshootingstar68 Offline OP
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myshootingstar68  Offline OP
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Joined: Feb 2018
Posts: 8
Honey Brook Pa
Not sure it is the jet...as it doesnt try to start..almost like no spark. But I can check the jet.

Re: Need Help with BSA Shooting Star [Re: Shane in Oz] #735188
05/14/18 2:12 am
05/14/18 2:12 am
Joined: Feb 2018
Posts: 8
Honey Brook Pa
M
myshootingstar68 Offline OP
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myshootingstar68  Offline OP
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Joined: Feb 2018
Posts: 8
Honey Brook Pa
First thing I did was changed the spark plug so its brand new. I only put about 200 miles a year on the bike and the "old" spark plug is about three years old and looked very good as only about 700 miles on it. When I kick it over, it usually starts in three kicks, but no huffing sound when the starter goes down as usually that means on the next kick or two, its ready to start.

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735217
05/14/18 7:42 am
05/14/18 7:42 am
Joined: Aug 2001
Posts: 3,803
argyll. scotland, uk
gavin eisler Offline
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gavin eisler  Offline
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Joined: Aug 2001
Posts: 3,803
argyll. scotland, uk
"but no huffing sound when the starter goes down"

perhaps the clutch is slipping?


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735218
05/14/18 8:13 am
05/14/18 8:13 am
Joined: Dec 2004
Posts: 9,293
Scotland
kommando Offline
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kommando  Offline
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Joined: Dec 2004
Posts: 9,293
Scotland
Or the exhaust lifter is working too well.

Re: Need Help with BSA Shooting Star [Re: gavin eisler] #735227
05/14/18 11:26 am
05/14/18 11:26 am
Joined: Feb 2018
Posts: 8
Honey Brook Pa
M
myshootingstar68 Offline OP
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myshootingstar68  Offline OP
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M
Joined: Feb 2018
Posts: 8
Honey Brook Pa
The clutch slipping would be after it's started and shifting gears would be hard.

Re: Need Help with BSA Shooting Star [Re: kommando] #735228
05/14/18 11:27 am
05/14/18 11:27 am
Joined: Feb 2018
Posts: 8
Honey Brook Pa
M
myshootingstar68 Offline OP
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myshootingstar68  Offline OP
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M
Joined: Feb 2018
Posts: 8
Honey Brook Pa
Exhaust lifter has to work well and wouldnt' cause the engine not to start.

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735236
05/14/18 1:07 pm
05/14/18 1:07 pm
Joined: Aug 2001
Posts: 3,803
argyll. scotland, uk
gavin eisler Offline
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gavin eisler  Offline
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Joined: Aug 2001
Posts: 3,803
argyll. scotland, uk
Clutches can slip on the compression stroke, if this happens you get no huffing sound


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735245
05/14/18 2:00 pm
05/14/18 2:00 pm
Joined: Dec 2004
Posts: 9,293
Scotland
kommando Offline
BritBike Forum member
kommando  Offline
BritBike Forum member
Joined: Dec 2004
Posts: 9,293
Scotland
By exhaust valve lifter working too well I meant it was holding the exhaust valve open all the time, it should have plenty of free play and only open the exhaust valve at the end of its travel.

This is worth a read also

http://www.britbike.com/forums/ubbt...ring-startup-lost-compression#Post733955

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735252
05/14/18 2:59 pm
05/14/18 2:59 pm
Joined: Oct 2008
Posts: 1,671
Canada
L
LarryLebel Offline
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LarryLebel  Offline
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Joined: Oct 2008
Posts: 1,671
Canada
Nothing lasts forever, so it could be a weak coil. The spark should be blue not yellow.

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735288
05/14/18 8:21 pm
05/14/18 8:21 pm
Joined: Sep 2004
Posts: 749
Farnham, Surrey, UK
gunner Offline
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gunner  Offline
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Joined: Sep 2004
Posts: 749
Farnham, Surrey, UK
A 50 year old bike is likely to have multiple issues related to old age and deterioration. Some ideas to check as follows;-
- HT lead insulation may be cracked and coil terminal corroded, so check and replace as necessary
- HT cap connection to HT lead may be bad
- Coil may be old and connections poor, check resistances
- Check the AAU for loose or weak springs as well as accurate timing
- Carburetor pilot jet could well be blocked, this is a common problem with AMAL concentrics, see This Link for details
- check compression and valve clearances
- use fresh petrol
- ensure you have at least 12v at the battery

BSA unit singles can often be problematic to start and careful attention to the basics is essential to ensure reliable starting.


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #735294
05/14/18 8:49 pm
05/14/18 8:49 pm
Joined: May 2018
Posts: 64
Oregon, USA
S
Sluggo650PNW Offline
BritBike Forum member
Sluggo650PNW  Offline
BritBike Forum member
S
Joined: May 2018
Posts: 64
Oregon, USA
A worthwhile purchase for any BSA unit single owner is Rupert Ratios guide to BSA Unit singles. Virtually the bible on this topic. He wrote the "Agony" Columns for the BSAOC and i can attest the books are well written, excellent info and well worth the investment.

He has since expanded the books and several volumes out now, Some were out of print but I recently corresponded with him and all should be in stock again or shortly, Cant recommend them enough. Of course, you need the factory manual and parts books as well, Chiltons, clymers simply will not do. If you need a copy of the factory books PM me and happily send you free copies.


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