The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: huddie on 14.04. 2010 15:09
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Hi You Guys, Did a 25 mile run yesterday, georgeous weather. This run was to take the mileage up to 50 since a full rebuild prior to torqueing the head again and starting a full running in program. I stopped about a mile from home for a photo shoot by a dis-used garage, the relic pumps are still there. Got my Shots went to start it up for the mile home, no joy!!. fuel was ok! By this time she had cooled down quite a bit but wasnt stone cold. Like a wally I had no mobile phone and no coins/keys with which to open the tool box. I tried for about 1/2 an hour still no joy so I pushed it home!!
I decided a step by step diagnosis was required. First I disconnected the kill switch wire to the mag as this was the last thing I did to stop her. Tickled the carb, away she goes first kick. Re-connected the wire thinking that would prove it but alas she fired up straight away!!.
I am going to go for another run tomorrow, no stopping til I get home and then leave it for 20 mins and try starting her again.
Any ideas why a warm/start should be a problem!!
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Sorry to hear that, I hope you are not too frustrated.
Did you have the mag rebuilt?
Could be a faulty condenser (or armature).
Cheers, Markus
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Hmmmm process of elimination I think... sticking kill switch? much sympathy for pushing an A10 home, you soon get to realise just how heavy the bike is.... got the t shirt! Hope you get sorted out soon.
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you soon get to realise just how heavy the bike is
I had my bike weighed last week, with a full tank of gas, 201 KG (442 LBS for you old farts *smile*).
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Check that little plastic mesh screen inside your banjo fitting on the monobloc.Mine is always semi blocked with crud allowing only just enough fuel to flow.Also these twins need lots 'o tickling hot or cold. How long does it take to dribble fuel whilst tickling? This is a giveaway!
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Thanks for your concern re pushing it home, to many hours gone into this one to abandon her. Haven't tried her again today, work got in the way. For you Markus, yes the mag was rebuilt about a year ago when she was first assembled from the basket case she was. Thanks wilko, will check the gauze. I have never checked how many depressions of the tickler before it dribbles, but I will now.
Regards to all Huddie
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Sitting on a pub/bar patio resting my leg because my bike is giving me unusual starting trouble, even for being warm. Started on two kicks at home. I have been lax changing plugs and checking points and timing. Warm is usually three or four kicks. I have an EasySpark, so maybe the dreaded coil leaks are starting to get me. I assume it will start so I can get home, but won't be going out again before isolating the worsening problem. If I sat here for two hours, I'm sure it would be fine. Sorry for the long story but gives me something to do while resting (myself and the bike).
Richard L.
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The few times mines not started when warm, i found holding the throttle fully open when kicking it has started it. Not sure if leaving it a short while floods enough to stop it sparking.
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Well, after wife and daughter showed up to rescue me and, in the process, eat a bunch of chicken wings with me, I got her started (the bike, not the wife). The solo bar singer/guitarist that was set up next to my bike thought it would be fun to encourage me starting the bike by getting the other patrons involved. Without them hearing it, I turned to him and said, "Dude, lay off it. I'm not happy about this." He did, nevertheless, there was applause when she started. I flashed him the peace sign (not the other one) as I left.
Richard L.
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Have a look at the plug colour. If the idle circuit is too rich it will struggle to start hot. As mentioned a couple of kicks with the throttle held wide open may help. I find mine requires tickling and air lever when cold and nothing but a kick when warm. Also if you have an advance and retard lever the spark weakens on retard so maybe kick it with the advance dialed up. Its only a knee cap after all.