Not able to idle w/o choke - Honda Shadow Forums : Shadow Motorcycle Forum
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post #1 of 14 (permalink) Old 06-17-2019, 05:22 PM Thread Starter
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Question Not able to idle w/o choke

I know there are other threads with a similar/same topic. My question is: Could I have caused this behavior to start while replacing the grips two weeks ago? Before I did the bike (07 Sabre 1100) was idle fine or slightly fast. Now it will not idle without the choke. when I get up to speed, I can turn off the choke and it seems to ride normally.

Thanks


Dave

2007 Honda Sabre

other bikes owned
1974 Honda CB750K, 1980 Yamaha XS11, 1981 Yamaha Maxim 650
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post #2 of 14 (permalink) Old 06-17-2019, 06:28 PM
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Welcome to the forum. I think you're about to meet the "Carbs R Us" gurus.


If it jams, force it. If it breaks it needed replacing anyway.
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post #3 of 14 (permalink) Old 06-17-2019, 07:08 PM
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there should be an idle adjustment thumb screw. my bike is different from yours but heres a pic of the adjustment screw on mine.Click image for larger version

Name:	20181027_194835_1560813176002.jpg
Views:	27
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ID:	263464 Id start there

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post #4 of 14 (permalink) Old 06-17-2019, 08:04 PM
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Quote:
Originally Posted by Kris Carr View Post
there should be an idle adjustment thumb screw. my bike is different from yours but heres a pic of the adjustment screw on mine.Attachment 263464 Id start there
And if this^ doesn't work for you, you may have a plugged A/F passage. Drain your float bowl, mix up some seafoam and get it into the system. After a day of it soaking some, you may try draining the float bowl again, just for good measure.

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post #5 of 14 (permalink) Old 06-17-2019, 08:14 PM
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If the ONLY thing you did was change the grips, it is possible the pull cable was holding the speed up before. Maybe a former owner had messed with the speed by tightening the pull cable since he couldn't adjust the speed otherwise ?
Try to screw in the speed adjust screw first, and see if the plugs are drilled out of the mixture screws and adjust them out 1/2 to 1 turn to see if that changes the idle.


There any way you were working around the carbs also and knocked off a vacuum hose or one split?

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post #6 of 14 (permalink) Old 06-17-2019, 08:52 PM Thread Starter
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Thanks everyone. A little more info. I thought it was bad gas at first and did a seafoam in the tank 2 times

I did have to remove the tank at one point during the process. I removed the small hose from the right side of the tank not sure if that is a vacuum hose and the fuel line from the petcock. I am pretty sure I got the small tube back correctly, but will double check.

I'll check these things in this order:
1. cable adjuster (swifty2014)
2. idle speed adjuster (Kris Carr) - what is the factory setting? Can I screw in all the way in and then a specific amount out?
3. mixture screws (swifty2014) - Can I screw them all the way in and then 1/2 to 1 turns out?
4. float bowls and more Sea Foam (Smilie)

Thanks again!

Dave

2007 Honda Sabre

other bikes owned
1974 Honda CB750K, 1980 Yamaha XS11, 1981 Yamaha Maxim 650
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post #7 of 14 (permalink) Old 06-17-2019, 09:06 PM
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If you've already put seafoam in it, I'd drain the float bowls and see what comes out. Between the seafoam and having things apart, you may have dislodged some crud and it's now plugging up your A/F passage, which is what it's running on at idle.

http://2007 Shadow Spirit VT750C2, Ride bell by h13man, Ride cross by Capt D
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post #8 of 14 (permalink) Old 06-17-2019, 10:21 PM
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If you have not adjusted or modified anything other than grips, then don't adjust anything on the carb. There is a Throttle Stop Screw that Chris mentioned. It is turned by hand (a plastic knob) so you don't need tools. Simply, it dictates how far the throttle cable returns. I am thinking you may have loosened the throttle cable. Try turning that up a bit until a nice "Honda" rumble idle: until you don't need choke. If that doesn't work I will be surprised but we can go from there.

G.

Last edited by gdb069; 06-17-2019 at 10:24 PM.
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post #9 of 14 (permalink) Old 06-17-2019, 11:26 PM
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@djwillard, for #2 just turn it a turn or two inward to raise the idle and then go from there up or down.



The mixture screws turn in GENTLY TO THEIR SEATED POSITION. Then back out 1-2 turns.

Only a biker knows why a dog sticks his head out of a car window.
1983 750 Shadow
From the past=
1951 Cushman scooter
1962 Honda 305 Dream
1965 Honda 305 Dream
1971 Honda 175 scrambler
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post #10 of 14 (permalink) Old 06-18-2019, 08:13 AM
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small hose right rear of the tank is the vent, to let air in the tank as the fuel level goes down.

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