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When you start your bike cold, what RPm does your engine idle at?

  • below 500 rpm

    Votes: 0 0.0%
  • between 500 and 1,000 rpm

    Votes: 4 11.4%
  • 1,400 rpm

    Votes: 26 74.3%
  • 2,000 rpm

    Votes: 5 14.3%
  • above 2,000 rpm

    Votes: 0 0.0%
  • it doesn't start unless I crack the throttle

    Votes: 0 0.0%
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Discussion Starter · #1 · (Edited)
So here's the deal:
I've heard about this "fast idle thing" that the bike is supposed to do when you first start it, but my 08 wee (which I bought new) does not do it.
It always idles at 1,400rpm, no matter what temperature I start it at.

I believe that's what the bike is supposed to do; a proper enriching system will enable the engine to run at its normal idle speed regardless of the temperature.

Still, I gatered from this forum that my wee might be supposed to idle at a higher speed than 1,400rpm when I start it cold. I've had it for 3 years now, and it always idles at 1,400 rpm and works very well (though it drinks much more gas than my 85 bmw k100rs, 3 more litres per 100 kms).

So yesterday morning when it was cool (5 am and below 18 celsius), I started it to check the idle speed. 1,400rpm it was. I shut the bike down and restarted it, and it went up to 2,000rpm for a total of two seconds before settling at 1,400 rpm.

I'm wondering if my bike is normal; I believe it is behaving properly, but am curious about what everyone else is experiencing...

I've started the bike at temperatures as low as -5 celsius (it never gets colder than that out here), and it's always been at 1,400rpm.
 

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i don't really ride below 40 F but right down to 40 it sits about 1400 for me. at times when it is really hot out, i've seen it drop down to like 1200. but, if it isn't normal, then at least you have company!
 

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I agree that they don't jump up like some cars and sit there for 3 min. but they do run faster when first started regardless of ambient temp. I think mine might have gone to 1450-1500, but worked it's way down to 1250 very soon (15 sec.) I think this is very typical. As you say, I'm sure it is just rich enough to continue running and the throttle bodies are open just enough to stop it from wetting it's plugs. (and I am also sure that it is doing micro sec adjustments via the ECU) Perhaps your idle speed is a smidge high and this allows it to get started without going any higher:confused:
 

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I have never really paid this much attention... I start the bike and finish getting my jacket and gear on. I put in ear plugs, don a safety vest, zip everything up, and start riding... I've never really paid much attention to the start-up RPM, but it ''sounds" normal, or else I would have noticed. At least I hope I would have noticed.

My $0.02
 

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It depends on how cold it is outside. I've see up to 1800rpm.
 

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I think it was about 2000 or so if I remember right, but I will have to wait till about January to let you know for sure because it is still 85F outside at 7AM, and about 95F in my garage.
 

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So here's the deal:
I've heard about this "fast idle thing" that the bike is supposed to do when you first start it, but my 08 wee (which I bought new) does not do it.
It always idles at 1,400rpm, no matter what temperature I start it at.
.
chalk it up too the strom being a budget bike and Suzuki using the cheapest primitive inconsistent FI system they can that gives them the most profits



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Discussion Starter · #8 ·
So what are you saying Randy?

Always idling at 1400rpm is not what I would call "the cheapest primitive inconsistent FI system";
 

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When starting cold in the morning regardless ambient temp, it goes to 2,000 rpm for about 2 to 4 secs then drop straight to normal idle, about 1350 rpm
 

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When starting cold in the morning regardless ambient temp, it goes to 2,000 rpm for about 2 to 4 secs then drop straight to normal idle, about 1350 rpm
Ditto with my '08...
 

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I did not select ANY of the choices because they are kinda bogus.

The AFIS (Auto Fast Idle System) is VARIABLE based on several factors.

It is not a "cheap" system like some have suggested in above posts. Instead, the idle-speed will be maintained just high enough to stabilize the engine without undue reving.

I have started my engine in ambient temps as low as 38F. The engine starts instantly and the idle is higher than 'normal'.... but slowly comes down to normal as the engine warms up over the next several minutes.

I have found that although the engine will start and idle almost perfectly at all ambient temps.... When cold, the throttle-response can be poor and behave unexpectedly. I have learned it is best to start the engine, then gear-up as the engine settles-out and only ride-off after I see at least one 'bar' on the guage.

Dont get me wrong... excessive idling is VERY bad for an engine and I am not advocating that kind of behavior. (especially with a cold engine!) I have seen what happens to pistons from excessive idling. Also a catalytic-converter may overheat due to excessive idling. (All true on your car too!)
 

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Mine settles at between 1000 and 1100 rpm, depending on the ambient temperature. I find that if I set mine any higher, it gets stuck up around 2400 rpm once underway. I will re-assess this after my 15k mile service.
 

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'09 wee, 1500 at start up, then after 5 seconds or so down to 1100 and settles around 1200.
 

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'05 DL650. I have the idle set slightly low, as it runs smoothly and never stalls. 1400 RPM at startup, goes down to 1100 after four seconds, and that's where it stays.
 

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So what are you saying Randy?

Always idling at 1400rpm is not what I would call "the cheapest primitive inconsistent FI system";
Unless he was talking about bike to bike inconsistency. Though from the sound of it most are pretty consistent. Can't verify the RPM, but based on my ears mine does about what yours does. Though mine always idles closer to 1300.
 

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My Wee starts and idles at about 1400 then round 15 seconds later slows to bout 800rpm. Would prefer it to sit on the recommended 1300 as the low idle tends to be a little hard to use at low speeds.
 

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My Wee starts and idles at about 1400 then round 15 seconds later slows to bout 800rpm. Would prefer it to sit on the recommended 1300 as the low idle tends to be a little hard to use at low speeds.
What year is the bike? 2004-2006 models have an adjustable idle speed screw (1) on the left frame member.

 

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My '05 Canadian Wee has always been the same, at any temperature. 1500 at cold start-up, then slowly settles back to 1000. I've never adjusted it as it seems fine.
 
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