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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: 12
Honey Brook Pa
M
myshootingstar68 Offline OP
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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: 934
Jaffrey, NH, USA
Peter Quick Offline

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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: 1,173
Sydney, Oz
S
Shane in Oz Offline
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Shane in Oz  Offline
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Joined: Oct 2001
Posts: 1,173
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: 12
Honey Brook Pa
M
myshootingstar68 Offline OP
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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: 12
Honey Brook Pa
M
myshootingstar68 Offline OP
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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: 4,114
argyll. scotland, uk
gavin eisler Online content
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gavin eisler  Online Content
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Posts: 4,114
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: 9,552
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,552
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: 12
Honey Brook Pa
M
myshootingstar68 Offline OP
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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: 12
Honey Brook Pa
M
myshootingstar68 Offline OP
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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: 4,114
argyll. scotland, uk
gavin eisler Online content
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gavin eisler  Online Content
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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: 9,552
Scotland
kommando Online content
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kommando  Online Content
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Posts: 9,552
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: 1,684
Canada
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LarryLebel Offline
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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: 852
Farnham, Surrey, UK
gunner Online content
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gunner  Online Content
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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: LarryLebel] #737907
06/06/18 11:22 pm
06/06/18 11:22 pm
Joined: Feb 2018
Posts: 12
Honey Brook Pa
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myshootingstar68 Offline OP
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Honey Brook Pa
I'll check the color...didnt know that...thanks!!!

Re: Need Help with BSA Shooting Star [Re: ] #737908
06/06/18 11:22 pm
06/06/18 11:22 pm
Joined: Feb 2018
Posts: 12
Honey Brook Pa
M
myshootingstar68 Offline OP
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Honey Brook Pa
I tried to PM you but your box is full.

Re: Need Help with BSA Shooting Star [Re: gunner] #737909
06/06/18 11:25 pm
06/06/18 11:25 pm
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Posts: 12
Honey Brook Pa
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myshootingstar68 Offline OP
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Honey Brook Pa
Gunner....I just cleaned the whole carb out...especially the drill holes...put it back on and it starts for a few seconds then quits....wouldnt be coil now or weak coil would cause it not to start? I have a new coil...should I just put it in? Fuel is in the float bowl as it seeps out when plunged and the plug gets a little wet when I work the kick starter so looks like its getting fuel. Thanks!

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #737914
06/07/18 12:37 am
06/07/18 12:37 am
Joined: Sep 2004
Posts: 852
Farnham, Surrey, UK
gunner Online content
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gunner  Online Content
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Farnham, Surrey, UK
Doesn't sound like a coil issue, if it's starting and then cutting out maybe the idle mixture is wrong, the idle mixture screw initial position is 1 and 1/2 turns out. Also check the throttle stop screw, you may need to lift or drop the slide position to get it to start and idle. Additionally check the throttle cable has some slack and isn't lifting the slide. Also worth checking the carb to cylinder flange isn't bowed and leaking air, this often happens with AMAL carbs when the mounting bolts are over tightened. Might even be that the float height is wrong.

There's a good guide on AMAL carb setup and tuning At this link.

Last edited by gunner; 06/07/18 12:38 am.

1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #738013
06/08/18 12:34 am
06/08/18 12:34 am
Joined: Jun 2002
Posts: 934
Jaffrey, NH, USA
Peter Quick Offline

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Jaffrey, NH, USA
My experience with coils that quit when running is that they also get real hot. Does your coil get real hot. Still sounds like a carb issue to me.

Peter

Last edited by Peter Quick; 06/08/18 12:34 am.

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: Peter Quick] #738115
06/09/18 2:44 am
06/09/18 2:44 am
Joined: Aug 2001
Posts: 3,884
Cape Carteret, NC
M
Mr Mike Offline
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Cape Carteret, NC
(1) If you are wetting the plug it is getting fuel, but starts much better and idles with a absolutely clean pilot jet. I run a drill bit thru it at least once a year(2) Does Is the compression seem to be as good as before? (3) I like to ground the plug with a clamp, and kick it over in a darkened room or break the points with points closed and ignition on... Should see a fat blue spark at the plug. If it is weak looking or orange in color, go through the ignition system. Hi tension lead (no resistor), coil, grounded condenser, wires in aau unit, battery connection, fuse, continuity in keyed ignition. You'll find it. I have a 68 SS. 441.


Mr Mike

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #738118
06/09/18 3:39 am
06/09/18 3:39 am
Joined: Aug 2012
Posts: 621
Oregon
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Dana_twin Offline
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Posts: 621
Oregon
I think gunner and mr mike mentioned the spark plug wire,
if it is a resistor plug wire - and old - it might look okay on the outside, but the carbon fibers inside break down over the years. I would go to a new magneto type solid core plug wire (ie not resistor) these days of digi TV's and radio there is no real reason to have resistor plug wires anyway., and of course that's assuming myshootingstar has a resistor wire. Also be sure the battery is fully charged.

If the compression is good, the spark is good, fuel is there ie carb okay, and the valve/ignition timing is okay, the engine has to run. smile

Re: Need Help with BSA Shooting Star [Re: myshootingstar68] #738163
06/09/18 3:11 pm
06/09/18 3:11 pm
Joined: Aug 2005
Posts: 1,500
melbourne florida
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bodine031 Online content
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Posts: 1,500
melbourne florida
Fresh fuel?? and the clutch can slip on the kick pedal and do you break the clutch pac loose before attempting to start ? I does sound like the pilot jet is clogged it runs for a short time on the overflow from the bowl and flooding the carb


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