| Amal Carburetor Servicing Tip [message #455053] |
Thu, 29 September 2005 08:10 |
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Application: Twin cylinder, twin carburetor English bike equipped with
Amals.
Symptom: Will not tick over. Both cylinders fire reliably at 1500 rpm.
Each plug can be grounded in turn and engine will run on either cylinder at
1500 rpm or better. As throttle is backed off, one cylinder begins to
misfire and the engine dies before idle speed is achieved.
Turns out the problem is fuel starvation in the pilot (idle) circuit of one
carburetor. Standard shop manuals do not eludicate the trouble. There is
a fixed metering jet pressed into the bottom of the passage into which the
air-adjustment screw is affixed. Remove the screw and shine a flashlight
into the passageway to inspect the condition of the pilot jet orifice. It
is very small in diameter and can be clogged by fuel deposits, especially
if the bike has been sitting during winter. The orifice should appear as a
tiny black spot. It is difficult to resolve the actual bore itself by eye.
Test the fuel circuit by injecting some water into air-screw port and plug
the air bleed at the carburetor bell end and apply a jet of compressed air
at the air-screw port. Water should be ejected at the two fuel-air
discharge ports in the venturi and, most importantly, water should be
ejected from the fuel feed port of the carburetor body where it
communicates to the fuel bowl. If water does not eject from any of the
three ports, then that port or pilot jet is clogged.
If the pilot jet cannot be opened by a soaking in carburetor cleaner and
compressed air, it will be necessary to use a probe to push through the
occulsion. Take a T-pin or a sewing needle and grind a slender taper to
the end. Then insert this tool into the air-screw port, locate the center
of the pilot jet and push the pin into the orifice to clear it. This
repair procedure is not covered in shop manuals and this small pilot jet is
overlooked in just about all cases, including, carburetor boil out
servicing.
These twins idle best with a rich mixture. One turn out from the seated
position is about right. A rich mixture is a more powerful mixture because
all the oxygen is consumed. A good engine should actually idle on one
cylinder. Balance the mixture and idle speed such that each cylinder can
sustain a minimum speed idle with the opposite cylinder grounded. Then with
both cylinders firing, advance the idle speed screw of each the same amount
to achieve a reliable 500 rpm idle. Expect under some conditions the idle
to creep up to as high as 750 rpm. This variation is normal as the
internal friction and atmospherics change the efficiency of the engine at
idle. Given good compression, free clutch, good spark, correct timing,
etc., weak mixtures are the major sources of complaints for difficult
starting and idling.
Given the lower fuel octane rating and conservative operation of the engine
which limits these big twins to about 5500 rpm, there is a benefit in
retarding the spark 6 degrees. The result will be a smoother, easier
starting engine that will not ping under load using regular-grade gasoline.
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| Re: Amal Carburetor Servicing Tip [message #455064 ] |
Thu, 29 September 2005 16:44 |
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Nomen Nescio wrote:
> Application: Twin cylinder, twin carburetor English bike equipped with
> Amals.
>
> Symptom: Will not tick over. Both cylinders fire reliably at 1500 rpm.
> Each plug can be grounded in turn and engine will run on either cylinder at
> 1500 rpm or better. As throttle is backed off, one cylinder begins to
> misfire and the engine dies before idle speed is achieved.
Application: Newsgroup where motorbike riders with technical problems
usually relating to older mass produced motorbikes seek solutions from
other riders with cogent information about common problems.
Problem: Anonymous user seeks to appear to be an expert on motobike
technology, and posts answers to questions that were never asked.
Information relates to motorbikes that most owners are unlikely to ever
own or have problems with. Anonymous user seeks to turn technical
discussions into abstruse debates in order to prove he's a genius in
other areas too.
Go away, Nomen Nescio.
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| Re: Amal Carburetor Servicing Tip [message #455070 ] |
Thu, 29 September 2005 19:00 |
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"krusty kritter" <kriyamanna [at] aol.com> wrote in message
news:1128005070.868798.248880 [at] g43g2000cwa.googlegroups.com...
snip
> Problem: Anonymous user seeks to appear to be an expert on motobike
> technology, and posts answers to questions that were never asked.
> Information relates to motorbikes that most owners are unlikely to ever
> own or have problems with. Anonymous user seeks to turn technical
> discussions into abstruse debates in order to prove he's a genius in
> other areas too.
Hmmm...now that certainly sounds familiar
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| Re: Amal Carburetor Servicing Tip [message #455093 ] |
Fri, 30 September 2005 03:22 |
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"krusty kritter" <kriyamanna [at] aol.com> wrote in message
news:1128005070.868798.248880 [at] g43g2000cwa.googlegroups.com...
>
> Nomen Nescio wrote:
>> Application: Twin cylinder, twin carburetor English bike equipped with
>> Amals.
>>
>> Symptom: Will not tick over. Both cylinders fire reliably at 1500 rpm.
>> Each plug can be grounded in turn and engine will run on either cylinder
>> at
>> 1500 rpm or better. As throttle is backed off, one cylinder begins to
>> misfire and the engine dies before idle speed is achieved.
>
> Application: Newsgroup where motorbike riders with technical problems
> usually relating to older mass produced motorbikes seek solutions from
> other riders with cogent information about common problems.
>
> Problem: Anonymous user seeks to appear to be an expert on motobike
> technology, and posts answers to questions that were never asked.
> Information relates to motorbikes that most owners are unlikely to ever
> own or have problems with. Anonymous user seeks to turn technical
> discussions into abstruse debates in order to prove he's a genius in
> other areas too.
>
> Go away, Nomen Nescio.
>
I would say KK is a jerk. The tip is a very useful one and quite correct.
T
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| Re: Amal Carburetor Servicing Tip [message #460771 ] |
Fri, 30 September 2005 15:42 |
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Tm wrote:
> I would say KK is a jerk. The tip is a very useful one and quite correct.
Nomen Nescio was on his good behavior, trying to establish himself as
an
"expert" on Amal carburetors. In a few days, after he's established
himself
as knowledgeable, he'll start telling you how to do things that might
wreck your engine, and he'll want to waste everybody's time debating
the physics of two-wheeled vehicles.
But, if you like him that much, why don't you invite him to
alt.motorcycles.triumph and crown him king?
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| Re: Amal Carburetor Servicing Tip [message #460779 ] |
Fri, 30 September 2005 18:42 |
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Tm wrote:
> I would say KK is a jerk. The tip is a very useful one and quite correct.
The difference is that KK's posts reveal an in-depth understanding
of motorcycle mechanics and engineering. NN is a prat who
knows how, on occasion, to type stuff here that he reads elsewhere.
Perhaps you've missed the entire corpus of NN's drivel? It's
self-serving and inane.
--
"Well," Brahma said, "even after ten thousand explanations, a fool is no
wiser, but an intelligent man requires only two thousand five hundred."
- The Mahabharata
Don't send me email replies -- this is a honeypot address for unsolicited
commercial email.
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| Re: Amal Carburetor Servicing Tip [message #460790 ] |
Fri, 30 September 2005 22:34 |
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Michael Sierchio <kudzu-usenet95 [at] tenebras.com> wrote in
news:I4idnXiVJqu99qDeRVn-vg [at] speakeasy.net:
> Tm wrote:
>
>> I would say KK is a jerk. The tip is a very useful one and quite
>> correct.
>
> The difference is that KK's posts reveal an in-depth understanding
> of motorcycle mechanics and engineering.
While Krusty is knowledgable, he's still a jerk.
--
Mike Freeman
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| Re: Amal Carburetor Servicing Tip [message #460792 ] |
Fri, 30 September 2005 22:53 |
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Michael J. Freeman wrote:
> While Krusty is knowledgable, he's still a jerk.
But what's your point? I generally prefer my moto mechanic,
my surgeon or the pilot of the plane I'm on to be competent --
being nice is a distant second. Suffering fools gladly is
never something I've thought to be a virtue.
--
"Well," Brahma said, "even after ten thousand explanations, a fool is no
wiser, but an intelligent man requires only two thousand five hundred."
- The Mahabharata
Don't send me email replies -- this is a honeypot address for unsolicited
commercial email.
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| Re: Amal Carburetor Servicing Tip [message #460793 ] |
Fri, 30 September 2005 23:05 |
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Michael J. Freeman wrote:
> Michael Sierchio <kudzu-usenet95 [at] tenebras.com> wrote in
> news:I4idnXiVJqu99qDeRVn-vg [at] speakeasy.net:
>
> > Tm wrote:
> >
> >> I would say KK is a jerk. The tip is a very useful one and quite
> >> correct.
> >
> > The difference is that KK's posts reveal an in-depth understanding
> > of motorcycle mechanics and engineering.
>
> While Krusty is knowledgable, he's still a jerk.
Whether the eponymous krusty kritter is an avatar or an atavism, he
resolves to remain unconcerned with what most other people think of
him...
And that is the beginning of jerk liberation...
Om mani padme---aw, stuff it!
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| Re: Amal Carburetor Servicing Tip [message #460801 ] |
Sat, 01 October 2005 02:02 |
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"Michael Sierchio" <kudzu-usenet95 [at] tenebras.com> wrote in message
news:I4idnXiVJqu99qDeRVn-vg [at] speakeasy.net...
>
> Perhaps you've missed the entire corpus of NN's drivel? It's
> self-serving and inane.
>
Perhaps.
TM
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| Re: Amal Carburetor Servicing Tip [message #460802 ] |
Sat, 01 October 2005 03:46 |
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Tm wrote:
> "Michael Sierchio" <kudzu-usenet95 [at] tenebras.com> wrote in message
> news:I4idnXiVJqu99qDeRVn-vg [at] speakeasy.net...
> >
> > Perhaps you've missed the entire corpus of NN's drivel? It's
> > self-serving and inane.
> >
>
> Perhaps.
One of the problems with "Nomen Nescio" is that he's using an anonymous
remailer service where about 99.9% of all users are "Nomen Nescio". I
found almost 200,000 posts on google, all from "Nomen Nescio" clones...
Sometimes *two* Nomen Nescios will be posting to one newsgroup,
confusing the other Usenet denizens as to what their agendas may be...
However, some of us are fairly sure that *this* particular
"Nomen Nescio's" agenda is to show us how smart he is, and he wants to
turn this NG, which is basically about riders helping each other solve
nuts and bolts problems, into a debating forum...
And that just wastes the time of the knowledgeable people who actually
can help the newbies with their problems.
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| Re: Amal Carburetor Servicing Tip [message #460805 ] |
Sat, 01 October 2005 04:32 |
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"krusty kritter" <kriyamanna [at] aol.com> wrote in message
news:1128131177.882348.173910 [at] g43g2000cwa.googlegroups.com...
>
> Tm wrote:
>> "Michael Sierchio" <kudzu-usenet95 [at] tenebras.com> wrote in message
>> news:I4idnXiVJqu99qDeRVn-vg [at] speakeasy.net...
>> >
>> > Perhaps you've missed the entire corpus of NN's drivel? It's
>> > self-serving and inane.
>> >
>>
>> Perhaps.
>
>
> And that just wastes the time of the knowledgeable people who actually
> can help the newbies with their problems.
>
Fair enough, I withdraw my comment. It was good info though.
TM
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| Re: Amal Carburetor Servicing Tip [message #460897 ] |
Mon, 03 October 2005 17:38 |
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Michael Sierchio <kudzu-usenet95 [at] tenebras.com> wrote in
news:6sydnYYNWvVrOKDeRVn-uQ [at] speakeasy.net:
> Michael J. Freeman wrote:
>
>> While Krusty is knowledgable, he's still a jerk.
>
> But what's your point? I generally prefer my moto mechanic,
> my surgeon or the pilot of the plane I'm on to be competent --
> being nice is a distant second.
The older I get the more I realize no one is irreplaceable. There are
plenty of competent *and* nice people out there. Why should I put up with
jerky behavior?
--
Mike Freeman
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| Re: Amal Carburetor Servicing Tip [message #460899 ] |
Mon, 03 October 2005 18:24 |
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Michael J. Freeman wrote:
> Michael Sierchio <kudzu-usenet95 [at] tenebras.com> wrote in
> news:6sydnYYNWvVrOKDeRVn-uQ [at] speakeasy.net:
>
> > Michael J. Freeman wrote:
> >
> >> While Krusty is knowledgable, he's still a jerk.
> >
> > But what's your point? I generally prefer my moto mechanic,
> > my surgeon or the pilot of the plane I'm on to be competent --
> > being nice is a distant second.
>
> The older I get the more I realize no one is irreplaceable. There are
> plenty of competent *and* nice people out there. Why should I put up with
> jerky behavior?
What, is somebody *forcing* you to read krusty kritter's helpful advice
to newbies and his occasional abrasive remarks to trolls?
No, you're posting to newsgroups out of boredom and loneliness instead
of getting out and interacting with real live human beans.
It's easy to stop your compulsive behavior, once you realize that it's
compulsive. Surfing the web out of boredom instead of going for a brisk
walk or an aerobic bicycle ride is as compulsive as stuffing a
cheeseburger in your face when you're not hungry.
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| Re: Amal Carburetor Servicing Tip [message #460900 ] |
Mon, 03 October 2005 18:25 |
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Michael J. Freeman wrote:
> Michael Sierchio <kudzu-usenet95 [at] tenebras.com> wrote in
> news:6sydnYYNWvVrOKDeRVn-uQ [at] speakeasy.net:
>
> > Michael J. Freeman wrote:
> >
> >> While Krusty is knowledgable, he's still a jerk.
> >
> > But what's your point? I generally prefer my moto mechanic,
> > my surgeon or the pilot of the plane I'm on to be competent --
> > being nice is a distant second.
>
> The older I get the more I realize no one is irreplaceable. There are
> plenty of competent *and* nice people out there. Why should I put up with
> jerky behavior?
What, is somebody *forcing* you to read krusty kritter's helpful advice
to newbies and his occasional abrasive remarks to trolls?
No, you're posting to newsgroups out of boredom and loneliness instead
of getting out and interacting with real live human beans.
It's easy to stop your compulsive behavior, once you realize that it's
compulsive. Surfing the web out of boredom instead of going for a brisk
walk or an aerobic bicycle ride is as compulsive as stuffing a
cheeseburger in your face when you're not hungry.
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| Re: Amal Carburetor Servicing Tip [message #460933 ] |
Tue, 04 October 2005 03:26 |
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krusty kritter wrote:
> What, is somebody *forcing* you to read krusty kritter's helpful advice
> to newbies and his occasional abrasive remarks to trolls?
I can't help myself! I always pause when I see signs of intelligent
life. If others don't appreciate your grandmotherly kindness, well --
Soylent Green is... people!
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| Re: Amal Carburetor Servicing Tip [message #460941 ] |
Tue, 04 October 2005 05:01 |
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Michael Sierchio wrote:
> krusty kritter wrote:
> I can't help myself! I always pause when I see signs of intelligent
> life. If others don't appreciate your grandmotherly kindness, well --
> Soylent Green is... people!
I haven't viewed "Soylent Green" in many years, but my coworker at a
wastewater treatment plant in Los Angeles said that the scenes of one
of the characters swimming to keep fit were filmed in an aeration tank
there.
Aeration is one of the final wastewater treatment stages, there isn't
any solid material floating in the water by that point.
I suppose they shut off the aeration while the actor (or his body
double) was swimming, since it's very hard to swim in aerated water.
And it smells pretty bad, too.
And, when I get into flame wars with various Usenet trolls, I often
think of the movie where Beau Bridges made a living as a cesspool
diver. He would show up at a redneck house in hillbilly country wearing
an immaculate white suit and announce that he would jump in their
cesspool for fifty cents.
The bored rednecks would often figure that such a spectacle was worth
fifty cents and Beau Bridges would collect the money, put on his diving
googles and jump into the cesspool and swim around for five minutes,
then the rednecks would haul him out, and he'd go sit on their porch
with them for half an hour talking to them and stinking up the porch.
Then the rednecks would become annoyed and they'd ask why he didn't
leave after collecting his fifty cents and doing his cesspool dive.
And Beau Bridges would say, "For fifty dollars, I will leave."
Anybody doesn't like krusty kritter's style can always set up a PayPal
account and mail me $50.00 and I'll stop stinking up the place---at
least long enough to burn up $50.00 worth of gas in my Yamahahahaha...
Never thought I'd be hoping for $2.00 a gallon gasoline.
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