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Warm up stumble

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Old Jul 11, 2012 | 10:12 AM
  #1  
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Default Warm up stumble

Today I did something a little different when starting my bike in the morning.
What I did was start the bike and let set and idle and warm up as I put on my gear.
What happen kind of surprised me as the engine 3 times stumbled and almost stalled during the two to three minute period it took me to get ready.
This is the first time I have noticed this as I usually get geared up first then start the bike and let in run a few seconds before starting off.
I did a search and found others having similar issues, but has anybody identified the particular reason why this happens to EFI bikes?
 
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Old Jul 11, 2012 | 11:29 AM
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Just start it, wait a couple seconds for the oil to swagger around the motor, and give it a little 500rpm twist and it'll warm up a lot smoother. It's a harley not a honda show it a little love
 
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Old Jul 11, 2012 | 04:44 PM
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Every time I start it up cold and let it sit it will stumble and occasionally stall. After a few minutes though, it runs fine. Yes, it is normal.
 
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Old Jul 11, 2012 | 10:03 PM
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Normal.
My 07 1200N does this stumble once around the 3 minute mark on a cold start.
No drivability issue if I start riding before that 3 minute time.
I recall other threads about this question, but do not recall the reason for the stumble.
 
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Old Jul 11, 2012 | 10:05 PM
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Have you tried playing with the choke as it starts to stumble. I find that on my '01, I have to adjust the choke down as the bike warms up.
 
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Old Jul 11, 2012 | 10:16 PM
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Originally Posted by Roni
Have you tried playing with the choke as it starts to stumble. I find that on my '01, I have to adjust the choke down as the bike warms up.
The OP has a 2011 model.
 
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