Re: Anyone else have this problem?
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Re: Anyone else have this problem? sdz;flkzxc.nm,v 06-28-2007
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Posted by sdz;flkzxc.nm,v on June 28, 2007, 12:37 pm

>I went for a ride yesterday on my Kawasaki VN800B Classic. I was less than
>two miles from home when I came to a four-way stop. I was still running a
>touch of choke.

Bad idea
After starting and a 30 second run, you dont need to choke it
"Choke" is only for starting.



Posted by Ed Cregger on June 28, 2007, 4:01 pm

>
>>I went for a ride yesterday on my Kawasaki VN800B Classic. I was less than
>>two miles from home when I came to a four-way stop. I was still running a
>>touch of choke.
>
> Bad idea
> After starting and a 30 second run, you dont need to choke it
> "Choke" is only for starting.
>
>


You would have to wait twenty minutes to a half an hour before being able to
ride if you didn't use partial choke. This one is really, really set lean.

Ed Cregger



Posted by Albrecht via MotorcycleKB.com on June 28, 2007, 8:29 pm
Ed Cregger wrote:

>You would have to wait twenty minutes to a half an hour before being able to
>ride if you didn't use partial choke. This one is really, really set lean.

The cold-blooded nature of your Vulcan is easily solved. Simply follow the
instructions I have posted a bazillion times about drilling out the EPA anti-
tamper plug and turning the idle mixture screws clockwise between 1/4 and 1
full turn.

I can't find the exact idle jet size, but it will be between a #35 and a #42.
Since the area of the orifice hole = pi times radius squared, you can see
that that the #42 idle jet has an area of 1.44 times that of the #35 idle jet.


So the initial factory setting on a carburetor with a #35 idle jet might be 2.
5 turns out and the initial setting of a carb with a #42 idle jet might be
less than 1/4th of a turn out.

http://www.bikebandit.com/partsbandit/showschematic.asp?dept_id=1130106

92066: PLUG,PILOT SCREW,[CA,US] (EPA anti-tamper plug)

16014: SCREW-PILOT AIR (It's really a pilot GAS screw, turning it
counterclockwise richens the idle mixture and eliminates the cllod-blooded
nature of the motorcycle.)

92063: MAIN JET,#140,(OPTION)

92064: JET-PILOT

92063A: MAIN JET,#135 ,(OPTION)

92063B: MAIN JET,#138,(OPTION)

92063C: MAIN JET,2ND,#130,(OFF ROAD USE ONLY)

92063D: JET-MAIN,#132,(OPTION)

http://www.factorypro.com > product support > Pilot jet, effect of size on
idle and cruise

http://www.factorypro.com/tech_tuning_procedures/tuning_pilot%20jet,%20affect%20of%20size%20on%


--
Message posted via http://www.motorcyclekb.com


Posted by paul c on June 29, 2007, 2:02 pm
Albrecht via MotorcycleKB.com wrote:
> Ed Cregger wrote:
>
>
>>You would have to wait twenty minutes to a half an hour before being able to
>>ride if you didn't use partial choke. This one is really, really set lean.
>
>
> The cold-blooded nature of your Vulcan is easily solved. Simply follow the
> instructions I have posted a bazillion times about drilling out the EPA anti-
> tamper plug and turning the idle mixture screws clockwise between 1/4 and 1
> full turn.
>
> I can't find the exact idle jet size, but it will be between a #35 and a #42.
> Since the area of the orifice hole = pi times radius squared, you can see
> that that the #42 idle jet has an area of 1.44 times that of the #35 idle jet.
>
>
> So the initial factory setting on a carburetor with a #35 idle jet might be 2.
> 5 turns out and the initial setting of a carb with a #42 idle jet might be
> less than 1/4th of a turn out.
> ...

I'm having trouble following this arithmetic. Is there an approximate
formula for deriving 1/4 from 2.5? (Being maybe too crude about it, I
would have guessed an approximate number of turns for the bigger jet of
2.5/1.44 = about 1 3/4 turns.)

cheers,
p

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