Thu Oct 17 23:50:06 1996 - Message No. 101
From: "Joerg Juenger"

Subject: Re: Choke or not choke


Hy guys,

The theoretical explanation of Pierre exactly explain the principle,
but i may add a minor correction.

>Pierre wrote:
>What happens when you pull the choke: the entry (toward the air
>filter side) is partially masked. This reduces the amount of air
>entering into the carb and increases the depression.
This is wrong for the @ carburators, thae way they and most other
motorbike's carburators is that pulling the choke opens up another small
channel for more fuel to to mix with the same amount of air (german word:
Startanreicherungskreislauf).

This results in the same facts as Pierre describes them.

>Achim wrote:
>Possible solution:
>When pulling the joke, the fuel/air mix is richer; therefore, the fuel that=
s
>inside the carbs needs more time to loose its components, because the amoun=
t
>is bigger than normal.
According to my knolegde the fuel coming through the channel of the choke
doesn't even reach the room where the petrol will stay for a while if you
don't use the engine. This channel ends up in the airstream, means the
petrol goes directly into the cylinder with the next breath of the engine.
I would consider it not a good idea to pull the choke for the last meters
after a drive because the fuel that is overplus will be blown into the
exhaust pipe and might stay there if you stop the engine. Doen't sound to
me like a good idea.


The big tank and crash bow describe by Achim:
The @ on that picture is an @ with this big tank, the crash bows are made
by somebody this guy manufacturing the tanks is working with. The @ is
about 5cm higher than usual due to a shorter handle at the rear suspension,
the handle is the  thing formed loke a U holding the part where the rear
sring is mounted in at it's lower end (sorry, i don't know the english
descriptions for all these parts).
The fork got 5cms longer by additional pieces srewed on top of the normal
fork (these pieces have the same diameter as the fork, so you can lower the
fork in it's handles). As far as i know this @ has a modified engine and a
different exhaust pipe (sources say about 77hp).
All these things are WITHOUT TUEV in Germany and usually only ment for
competion usage.

Sorry, the name of the owner is not known by me.

Have fun,
JJ


--------------------------------------------------------------
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