SuzukiSavage.com - Stalling at idle in cold weather until warmed up

DavidOfMA

Senior Member

Offline

Getting back in gear
after a long time
away

Posts: 336
Beverly, MA
Gender: male

Stalling at idle in cold weather until warmed up
11/29/12 at 09:41:21

Weather's turned colder, and I'm finding that my 2007 now stalls at idle until it's fully warmed up, even with the choke all the way out. I have to keep the idle speed up with the throttle when stopped at stop signs, traffic lights, or left-hand turns until I've ridden a mile or more. Is this normal for this bike? First time I've ridden in cold weather. Tried turning the idle screw in a bit, but all that does is make it idle too fast when warmed up. Also tried partly closing the choke (which I have to do in warmer weather while it's still cold, or it'll stall when stopped), but no joy there, either.

Thanks!

David

Back to top

- David

IP Logged

Dave YaBB Moderator ModSquad Online SuzukiSavage.com Rocks! Posts: 18104 Camp Springs, Kentucky Gender:	Re: Stalling at idle in cold weather until warmed Reply #1 - 11/29/12 at 09:52:01 Which idle screw are you turning in a bit? The idle mixture screw (right side) should be opened a bit if you want a richer mixture - the idle speed screw is on the left side and will increase/decrease idle speed. What jets do you have in the carb after all your backfire adventures?
Back to top	Someday I will be old......But not today! IP Logged

DavidOfMA

Senior Member

Offline

Getting back in gear
after a long time
away

Posts: 336
Beverly, MA
Gender: male

Re: Stalling at idle in cold weather until warmed
Reply #2 - 11/29/12 at 10:05:10

I have a 55 pilot jet and a stock main jet. The idle mix screw is set for maximum idle when warmed up and backfiring is somewhat reduced but still not eliminated. It was set a week ago, when the air temp was about 50. Now it's 39. Don't know if the same problem occurred at air temp 50, as I only rode it after the bike had warmed up (dealer mechanic adjusted the idle mix and idle speed).

The screw I was talking about in my OP is the idle speed screw. I had hoped upping the idle speed a bit would allow me to ride without having to monitor the engine speed with the throttle when stopped.

What I'm really looking for, first, is, is this normal for this bike (stalling at idle until it warms up, when riding in colder weather), or do I have yet another carburation issue?

Back to top

- David

IP Logged

verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28889 L.A. California Gender:	Re: Stalling at idle in cold weather until warmed Reply #3 - 11/29/12 at 10:12:56 Idle speed does vary a bit with weather. But your bike should be warm up after 5 minutes
Back to top	Versey's Place Tech Section Index IP Logged

DavidOfMA

Senior Member

Offline

Getting back in gear
after a long time
away

Posts: 336
Beverly, MA
Gender: male

Re: Stalling at idle in cold weather until warmed
Reply #4 - 11/29/12 at 10:22:45

In general I guess it is warmed up after 5 minutes. It doesn't take me more than five minutes to go a mile or two.

What I'm trying to find out is, is it typical for this bike to stall out at idle, such as when stopped at a stop sign, when it is ridden in cold weather and not yet warmed up (that is, is within that first five minutes of riding)?

Thanks. It runs fine after it's fully warmed up, except for backfiring.

Back to top

- David

IP Logged

Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28678 Tucson Az Gender:	Re: Stalling at idle in cold weather until warmed Reply #5 - 11/29/12 at 10:41:36 Mine likes choke when it's cold,.. but, it don't tend to die... I'd say it's not generally normal... Is your air filter clean?... ...
Back to top	Ludicrous Speed !... ... ... IP Logged

MShipley Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 681	Re: Stalling at idle in cold weather until warmed Reply #6 - 11/29/12 at 12:01:28 mine will die until it is fully warmed up.
Back to top	IP Logged

DavidOfMA

Senior Member

Offline

Getting back in gear
after a long time
away

Posts: 336
Beverly, MA
Gender: male

Re: Stalling at idle in cold weather until warmed
Reply #7 - 11/29/12 at 12:57:56

Serowbot wrote on 11/29/12 at 10:41:36:

Is your air filter clean?... Huh

...

That's an interesting question. I've never seen a new S40 air filter so I don't know what 'clean enough' looks like. It's gray and I can see only a little light through it. I blew it out with compressed air but that made no visible difference. How clean is clean enough?

Back to top

- David

IP Logged

verslagen1

YaBB Moderator
ModSquad

Offline

Where there's a
will, I want to be
in it.

Posts: 28889
L.A. California
Gender: male

Re: Stalling at idle in cold weather until warmed
Reply #8 - 11/29/12 at 13:22:33

DavidOfMA wrote on 11/29/12 at 10:22:45:

In general I guess it is warmed up after 5 minutes. It doesn't take me more than five minutes to go a mile or two.

What I'm trying to find out is, is it typical for this bike to stall out at idle, such as when stopped at a stop sign, when it is ridden in cold weather and not yet warmed up (that is, is within that first five minutes of riding)?

Thanks. It runs fine after it's fully warmed up, except for backfiring.

have you tried one knotch out?

Back to top

Versey's Place
Tech Section Index

IP Logged

DavidOfMA Senior Member Offline Getting back in gear after a long time away Posts: 336 Beverly, MA Gender:	Re: Stalling at idle in cold weather until warmed Reply #9 - 11/29/12 at 13:28:53 One notch out? On the idle mix screw, you mean? As in, say, another quarter turn out? Or do you mean something else?
Back to top	- David IP Logged

Dave YaBB Moderator ModSquad Online SuzukiSavage.com Rocks! Posts: 18104 Camp Springs, Kentucky Gender:	Re: Stalling at idle in cold weather until warmed Reply #10 - 11/29/12 at 13:36:23 One notch out on the choke......mine likes that setting when it is cold.
Back to top	Someday I will be old......But not today! IP Logged

DavidOfMA

Senior Member

Offline

Getting back in gear
after a long time
away

Posts: 336
Beverly, MA
Gender: male

Re: Stalling at idle in cold weather until warmed
Reply #11 - 11/29/12 at 13:42:43

When the bike and air are both cold, it stalls wherever I put the choke. When it's warm, runs okay with the choke in. When it was warmer weather, and before recent carb mods, it ran fine on one choke notch until the bike warmed up, then no choke. Can you run at idle from a cold start when the weather is under 40F?

Back to top

- David

IP Logged

verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28889 L.A. California Gender:	Re: Stalling at idle in cold weather until warmed Reply #12 - 11/29/12 at 13:46:05 Aha, you did something to the carb... what?
Back to top	Versey's Place Tech Section Index IP Logged

DavidOfMA Senior Member Offline Getting back in gear after a long time away Posts: 336 Beverly, MA Gender:	Re: Stalling at idle in cold weather until warmed Reply #13 - 11/29/12 at 13:51:48 I took it to a shop, where they went up a size on the pilot jet to try to eliminate backfiring on decel. Also checked the TEV and floats. Can't tell if this had an effect on stalling because I hadn't ridden it on cold days before the mod. Does your bike stall on idle at under 40F??
Back to top	- David IP Logged

Dave YaBB Moderator ModSquad Online SuzukiSavage.com Rocks! Posts: 18104 Camp Springs, Kentucky Gender:	Re: Stalling at idle in cold weather until warmed Reply #14 - 11/29/12 at 14:01:42 DavidOfMA wrote on 11/29/12 at 13:51:48: Does your bike stall on idle at under 40F?? Nope.....both the bike and I are keeping warm inside! I wonder if the combination of a 55 Pilot Jet and choke are just too much when combined....even on the first notch. A 55 Pilot jet seems to be awfully rich.
Back to top	Someday I will be old......But not today! IP Logged