Re: Bike won't start after carb cleaning.
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Re: Bike won't start after carb cleaning. Nameless 1 04-09-2008
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Posted by P.J.Berg on April 19, 2008, 11:53 am

>
>>
>> Are you *sure* the idle mixture screws on these '83 GPz305 carbs are
>> actually air screws and not fuel screws?  If they are anything like the
>> TK carbs on my '82 GPz550 they are fuel, not air screws, so turning
>> them further in will in fact lean out the idle and part throttle
>> mixture.
>
> Thinking about it now, it is a Keihin carb (not TK) and the screws are
> position on the half of the carb that is closer to the air box and not
> the front of the engine. Guess this means I have air screws and not
> fuel screws, right?

Just remove one screw and look at it, a fuel screw is pointy with a narrow
cone(Has a small spring, washer and o-ring in that order, which sits in
the body of the carb), an air screw is blunt with a wide cone.

J.



--
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Posted by . on April 11, 2008, 2:36 pm
On Apr 11, 11:12=A0am, esteves.gr...@gmail.com wrote:

> What can I do to richen the mixture?

Follow your manual's recommendation for initial setting of idle
mixture screws. As I said previously, it's hard to give a rule of
thumb for GAS screws, because the area of an idle jet varies
exponentially as to the radius of the orifice hole.

The range of adjustment can be anywhere from 1/4 of a turn off the
seat with larger # idle jets ( #40 to #45) to 3-1/2 turns of the seat
with smaller # idle jets (#30 to #35).

Normally, an idle mixture screw that is downstream of the throttle
butterfly controls previously-mixed fuel and air and is regarded as a
GAS screw.

Turning a GAS screw counterclockwise richens the idle mixture and this
has effect from closed throttle until the throttle
is wide open.

Idle mixture screws that are on the air intake side of the carb are
AIR screws, and turning them clockwise richens the idle mixture.

Posted by Who Me? on April 11, 2008, 7:00 pm


>which inevitably
>backsprayed onto my eyes and face. Guess what folks: I can still see
>and despite even tasting it, I managed to survive.

You're lucky. That was a pretty stupid move.

> I figured that by letting less air in that it would richen the mixture.

Yes but what makes you believe that the screw you are turning is regulating
the AIR?
I propose that it is the gas you are adjusting and more turns out = more gas
= richer mixture.

After that, you need to look for an air leak BEHIND the carbs.....like a
loose or cracked boot.

Are you doing this (mostly) without the air cleaners on? Many bikes require
a slight restriction in the incoming air to achieve the right mixture (all
things being stock,that is). Without that, they are too lean.

P.S. You might want to be a little more careful about who you berate. They
might end up actually helping you out.........if you don't piss them off too
bad.




Posted by Eat Dirt on April 11, 2008, 7:46 pm

> Yes but what makes you believe that the screw you are turning is regulatin=
g
> the AIR?
> I propose that it is the gas you are adjusting and more turns out =3D more=
gas
> =3D richer mixture.

I suppose a good way to move forward is by figuring out which my
mixture is.
Can you clever folk please look at these links. It shows the carb in
detail

http://www.babbittsonline.com/pages/parts/viewbybrand/9/Kawasaki.aspx
http://www.babbittsonline.com/pages/parts/viewbybrand/9/Kawasaki.aspx

This is a typical CV carb and all the parts in mine are here,
including the mixture screw with the exact parts (bolt, screw, washer,
o'ring)
http://www.oldmanhonda.com/MC/Rcarbs.html

Is there a way to certify which mine is based on these pics?

Posted by Eat Dirt on April 11, 2008, 7:50 pm
>
> > Yes but what makes you believe that the screw you are turning is regulat=
ing
> > the AIR?
> > I propose that it is the gas you are adjusting and more turns out =3D mo=
re gas
> > =3D richer mixture.
>
> I suppose a good way to move forward is by figuring out which my
> mixture is.
> Can you clever folk please look at these links. It shows the carb in
> detail
>
> http://www.babbittsonline.com/pages/parts/viewbybrand/9/Kawasaki.aspxhttp:=
//www.babbittsonline.com/pages/parts/viewbybrand/9/Kawasaki.aspx
>
> This is a typical CV carb and all the parts in mine are here,
> including the mixture screw with the exact parts (bolt, screw, washer,
> o'ring)http://www.oldmanhonda.com/MC/Rcarbs.html
>
> Is there a way to certify which mine is based on these pics?


Shoot, the first link won't work unless you navigate to my bike.
Please go to Kawasaki/EX305 B1 GPz305 then look up the fiche for the
carb.

Page 3 of 11       < 1 2 3 > last >>
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