Author Topic: no power  (Read 3040 times)

Online bsa-bill

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Re: no power
« Reply #15 on: 26.08. 2010 10:36 »
That's a fun looking bike Frenchy, nice bit of work to make the carb extension  *respect*  but I agree with the other guys, it MIGHT make a difference. Thick carb washers are available ( Draganfly and others).
That black gearbox inspection cover appeals to me if I could get three rifles on it also, I feel a time wasting idea brewing  *whistle*
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline tombeau

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Re: no power
« Reply #16 on: 26.08. 2010 11:11 »
I'm also suspicious of the long manifold. I'd also fit s a carb drip tray, I know of a few A10s that have been lost to fire for want of one. Looks like a fun bike though.
Cheers,
Iain

Offline Triton Thrasher

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Re: no power
« Reply #17 on: 26.08. 2010 11:55 »
If the clutch was slipping so much you could only do 5mph, the kickstart would not turn the engine over.

Offline brackenfel

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Re: no power
« Reply #18 on: 26.08. 2010 12:49 »
Hi Frenchy,
I've just looked at the photos & must agree with the others. Junk the carb extension, get a thick fibre spacer in its place with a good gasket either side and fit a drip slope / tray asap..
Cheers,
Adrian
1961 A10 650 Golden Flash - Blue
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Online RichardL

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Re: no power
« Reply #19 on: 26.08. 2010 13:40 »
According to the caption, Frechy needs the manifold in order to clear the Hunt magneto. From the photo, that appears to be correct. So what was Hunt thinking?

Richard L.
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Offline Frenchy

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Re: no power
« Reply #20 on: 26.08. 2010 14:54 »
Quote
If the clutch was slipping so much you could only do 5mph, the kickstart would not turn the engine over.
Thanks.  I have a complete gasket set, so I'll probably take a look at the clutch anyway.

Quote
So what was Hunt thinking?
I was wondering that, too.  I had to grind a bit on it to get it to bolt on, too.

As for the carb extension, I'll look more into that.  I have family stuff today, so I'll be back at it on Friday.  I'm sure you'll hear from me then!
1957 A7 bobber, swing arm
Columbus, Ohio, US

Offline beezalex

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Re: no power
« Reply #21 on: 26.08. 2010 15:54 »
So what was Hunt thinking?

He was thinking: I could take some fairbanks-morse tractor magnetos and stick them on just about every motorcycle known to man....some better than others.

So let's get some more specific symptoms before you start tearing into stuff:
Does it start and idle OK?
Does it rev in neutral?
Does it smoke?
Does it run on both cylinders? (If you can't tell by the sound, pull off each plug wire one at a time while it's running and see if anything changes)

....wait....I just noticed something from the pictures....

Turn the choke off once the bike's running.  Everything will be OK.
Alex

Too many BSA's


Offline A10Boy

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Re: no power
« Reply #22 on: 26.08. 2010 18:23 »
All comments from me deleted as I don't want to be banned. Suffice to say I'm reading this thread with a fair amount of disbelief....
Regards

Andy

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Plus
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Online bsa-bill

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Re: no power
« Reply #23 on: 26.08. 2010 18:43 »
Andy - your not by any chance thinking about the fuel delivery, which is a tad over engineered but should still deliver petrol to the carb, or have you spotted something else.
Do tell - politely
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline lawnmowerman

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Re: no power
« Reply #24 on: 26.08. 2010 19:58 »
Think I have spotted the same thing as you Alex - the choke cable is slack at the carb top meaning it is full on. Also looks like the adjuster is missing so probably will not be able to be turned off completely anyway.
Interested in what you have noticed Andy.

Jim
1959 A10 SR
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Online bsa-bill

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Re: no power
« Reply #25 on: 26.08. 2010 21:21 »
ignition switch  - no battery - magneto -  do we take it the electronics are no longer used ?   
Choke should be the back one Jim which although out of the adjuster would withdraw, however the throttle has no adjuster and may well have slipped down into the carb  so the slide and needle don't lift         
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline cus

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Re: no power
« Reply #26 on: 26.08. 2010 22:56 »
This is turning into a bit of a saga, but is interesting just the same.
Frenchy says he has lots of rev & no go! I don't think it would be reving OK
with full choke, but anyway, we'll have to wait & see,

Cus
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Offline Frenchy

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Re: no power
« Reply #27 on: 28.08. 2010 03:35 »
I didn't get much time to tinker today, unfortunately.  I took the carb off and made a shorter manifold out of wood with no better results.  The needle lifts fine, and the choke turns on and off fine.  Way less oil leakage today, though.  The highlight of the day was when a muffler fell off on my street, at 5mph of course, and the neighborhood kids all offered to help push me home.  I had some spare shorties loosely bolted on to keep the noise down...  This thread IS turning into a saga, and I appreciate all your interest/ideas/advice. 
1957 A7 bobber, swing arm
Columbus, Ohio, US

Offline Triton Thrasher

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Re: no power
« Reply #28 on: 28.08. 2010 08:13 »
According to the caption, Frechy needs the manifold in order to clear the Hunt magneto. From the photo, that appears to be correct. So what was Hunt thinking?

Richard L.

From the photo, it looks like the extension doesn't need to be nearly as long as it is.  A thick spacer might be enough.

With that long rigid pipe, expect fuel frothing, leading to untuneable richness and vibration-induced float valve leakage, leading to worse richness.