BSA starfire, not starting.

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Posts: 432
Joined: Fri May 08, 2009 11:03 am

Re: BSA starfire, not starting.

Unread post by Crankcase » Sun Jan 04, 2015 3:02 am

Guess a new condenser will not break the bank and it eliminates a possible . As you now have a spotlessly cleaned carb . You now need to check the spark sparks when it should ;) check then recheck the timing marks then reset the points rig up a test light to show exactly when they open beats using a fag paper.
I dont know how you have checked the AAU but the only way is to remove the unit dont use a puller or force just remove the bolt then a gentle tap on the unit and it will pop out if you have a good one you are bloody lucky they usually play up by stalling the engine at junctions traffic lights etc by sticking on full advance a worn unit may be the reason you can get the bike to start but not run.
Happy fettling.

PS Sorry if I have pointed out the bleeding obvious but diagnostics on the internet are akin to reading tea leaves
A bike on the road is worth two in the garage.

Posts: 98
Joined: Fri Mar 20, 2009 11:04 am
Location: Ireland

Re: BSA starfire, not starting.

Unread post by Looper » Sun Jan 04, 2015 3:50 pm

Embarrassed to say but all it needed was a new plug. I'm sure the attention to the points, carb etc hasn't been a waste of time but I managed to get a plug (not the right one but close) at a local place and she's starting like a champ. Must have been a very weak spark even though it looked ok to me. Just got to fix the rest of it now, total restoration needed. Thanks to everyone for their help.

Posts: 107
Joined: Fri Dec 03, 2010 11:24 pm

Re: BSA starfire, not starting.

Unread post by DerryUK » Mon Jan 05, 2015 12:23 am

Good news.

The reverse happened to me once many years ago. I rebuilt a Mini engine, the whole nine-yards and it wouldn't start. I tried everything over a period of a couple of days I could think of to get it going. Nothing worked. In desperation I took out the new spark plugs I had fitted an put the old ones back in. She started straight away.

Posts: 60
Joined: Mon Jul 19, 2010 6:50 pm

Re: BSA starfire, not starting.

Unread post by Darrell » Thu Jan 15, 2015 1:49 am

Hi, I recently did some work on my B25 during which I had to disturb the timing. Normally the bike is a good starter but after putting it back together it took ages to start.......last time it took over 30 kicks even though it 'fired' every time. It just wouldn't catch. I had not performed a check on the timing marks using a strobe since I had marked the fixings which held the electronic ignition coils before stripping it down to do the work. The subsequent check using the strobe light confirmed that the ignition was a little retarded. After advancing the timing a little the bike now starts as it did before i,e, first, second or third kick. That is a long way of saying to you "advance your ignition a tad". If it is too far advanced, it will give a vicious 'kickback'.

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