Throttle delay when cold - Ducati Supersport 939 Forum
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post #1 of 58 (permalink) Old 06-13-2019, 10:21 AM Thread Starter
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Throttle delay when cold

So this is a rather odd one. I just got my bike this year, but I've never had another bike do this. When my bike heats up to around 180, it's fine. Throttle is immediate, everything feels gucci and right. However, when just starting it up and heading out, before the bike is heated up, there is an almost half second throttle delay. When the throttle does come on, it doesn't feel like I'm getting everything. Like I said, this goes away once the engine heats up. Has anyone else had this issue? This is very much not in my head, it's extremely noticeable. The difference between the bike at 180F and 120F is pretty massive in terms of throttle response.

  • 2018 Softail Slim
  • 2019 Supersport S

Last edited by Squidlet; 06-13-2019 at 10:25 AM.
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post #2 of 58 (permalink) Old 06-13-2019, 10:30 AM
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I always warm it to the 150 F range before riding, and no issue then.
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post #3 of 58 (permalink) Old 06-13-2019, 10:39 AM
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Quote:
Originally Posted by Squidlet View Post
So this is a rather odd one. I just got my bike this year, but I've never had another bike do this. When my bike heats up to around 180, it's fine. Throttle is immediate, everything feels gucci and right. However, when just starting it up and heading out, before the bike is heated up, there is an almost half second throttle delay. When the throttle does come on, it doesn't feel like I'm getting everything. Like I said, this goes away once the engine heats up. Has anyone else had this issue? This is very much not in my head, it's extremely noticeable. The difference between the bike at 180F and 120F is pretty massive in terms of throttle response.
I noticed the same thing but only after the dealer did the annual service. Once it warms up, no lag. I haven't noticed it the last couple of times I've ridden it.

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post #4 of 58 (permalink) Old 06-13-2019, 10:50 AM
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This happened to me two days ago and I shrugged it off as it was the first time the bike seemed to do it. It kind of seemed rough to boot - like a carbureted bike does when not warmed up. Not something I'd expect from FI.

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post #5 of 58 (permalink) Old 06-13-2019, 01:05 PM
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I heat mine up until its not showing low anymore. I dont feel a slow response from get-go by a few meters in it feels the fuel feed dipped a smidge. It could just be me coming off the throttle ever so slightly due to a bump or something.

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post #6 of 58 (permalink) Old 06-13-2019, 03:33 PM
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I haven't noticed that mine does that. I'll pay closer attention, but I wouldn't like it if it did that.
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post #7 of 58 (permalink) Old 06-13-2019, 04:02 PM
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Yeah same thing, it has been happening since the latest ECU update.




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post #8 of 58 (permalink) Old 06-13-2019, 04:21 PM
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Originally Posted by revoconner View Post
Yeah same thing, it has been happening since the latest ECU update.
Since this happened after my annual service, I was suspicious of this.

John L

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post #9 of 58 (permalink) Old 06-13-2019, 06:28 PM
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Quote:
Originally Posted by LowRyter View Post
Since this happened after my annual service, I was suspicious of this.
I just had my annual service done. Didnt involve any ECU updates

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post #10 of 58 (permalink) Old 06-13-2019, 06:47 PM
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yeah mine feels very different for the first bit of riding. feels like the engine isn't making full power but just getting by. I always wait until low is gone but usually leave at 108ish.

I only noticed it recently but didn't think anything of it until your comment.
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