Choke on increases idle when warm. Normal? - Kawasaki Vulcan Forum : Vulcan Forums
 
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post #1 of 4 (permalink) Old 01-21-2018, 07:06 PM Thread Starter
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Choke on increases idle when warm. Normal?

Most bikes I have had, once the bike is warm and you pull out the choke knob (enriching), the bike sputters/floods and dies. I just replaced this bike with a new choke mechanism (plunger and cable). Now when the bike is warm and I pull out the choke knob, the bike increases in rpm and doesn't cough or sputter--just increases in rpm. Otherwise bike runs good, no popping, no backfiring, no bogging.

I'm fixing to pull the carb again (pesky bowl gasket leaking) so is there any thing I need to do while the carb is off? Or can the lack of sputtering/dying be normal? Any thoughts/guidance?

Stock jetting, stock air intake, Cobra pipes w/baffles in, 2000' altitude. Thanks.

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Last edited by texasgrape; 01-22-2018 at 06:17 AM. Reason: More info.
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post #2 of 4 (permalink) Old 01-22-2018, 01:24 AM
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Quote:
Originally Posted by texasgrape View Post
Most bikes I have had, once the bike is warm and you pull out the choke knob (enriching), the bike sputters/floods and dies. I just replaced this bike with a new choke mechanism (plunger and cable). Now when the bike is warm and I pull out the choke knob, the bike increases in rpm and doesn't cough or sputter--just increases in rpm.
Out of my knowdlege, this could indicate a lean condition.
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post #3 of 4 (permalink) Old 01-22-2018, 07:04 AM
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On a non-enriching normal choke setup if you pull the choke the rpms should increase.
Had it happen many times before.


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post #4 of 4 (permalink) Old 02-20-2018, 03:26 PM Thread Starter
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Just an update: Installed next larger size pilot jet (50) and that corrected the problem. Now when I pull the choke out a little, rpms increase like Vulcandoc said, but pull it out all the way, it sputters badly, which is what I was used to. I was also able to better dial in my fuel mixture screw. It was at 4 1/2 turns out, now back to 2 1/2. For all those who say rejecting is not necessary with just aftermarket pipes, this bike with these particular Cobra tapered pipes (with baffles) did require a pilot jet change when the fuel screw alone would not remedy the lean condition.

Now I'm fixing to Grampsize so it all gets tuned differently now. LOL

1996 Vulcan 800, Blue/Green
JUST SOLD: 2016 Indian Scout, Black
SOLD LAST YEAR: 2006 Triumph Rocket III, Black
SOLD LAST YEAR: 1967 Honda 305 Dream, Black

"Going up the country . . . "
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