Oooops, wrong screw (fast idle) - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 5 Old 05-04-2012, 04:32 PM Thread Starter
Join Date: Apr 2012
Location: Northern Virginia
Posts: 94
Oooops, wrong screw (fast idle)

Hi. I just picked up a 2005 Vee. It had a bit of a studder around 4K, so I figured I would sync the throttle bodies. I pretty much had them balanced but was trying to get them even closer and, oops, reached in a grabbed the wrong screw and gave it a twist. Took a little bit before I realized what happened. Seemed like a good time for a break right then.

So I've been trying to research a cure. The couple procedures I've seen so far talk about removing the tank (mine is over half full currently). Does this need to be done on a DL1000 to reset the fast idle?

I'm not morally opposed to removing the tank since I need to get familiar with the bike anyway. But if it isn't necessary, I'd rather not bother with it. Thanks!
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post #2 of 5 Old 05-04-2012, 04:34 PM
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Join Date: Aug 2010
Location: Elk Creek, Kentucky
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There should be an external screw by the frame rail below the side of the tank on the left side...looks like a phillips head. Good luck with the sync. I had to remap my efi to get the stumble out.

2007 Blue SuperVee 1000
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2002 White HD Road King Police (divorced)
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post #3 of 5 Old 05-04-2012, 09:11 PM Thread Starter
Join Date: Apr 2012
Location: Northern Virginia
Posts: 94
I checked the TPS and it's fine. The throttle bodies are now balanced. But the studder around 4-5000 is actually worse. I haven't verified the fast idle is set correctly, but it doesn't seem like that would matter.

Is there anything in the area of the balance screw I might have bumped? It's not terrible, but it is definitely worse. Front plug wire maybe?
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post #4 of 5 Old 05-06-2012, 09:34 PM
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Join Date: Oct 2008
Location: Hot Springs, Arkansas, USA
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Maybe move your post to the DL1000 (Vee) section, but ... not quite sure what you think you did wrong. Set the fast idle wrong? I've done that, and then I undid it.

I've become a fan of what a competent shop can do with Yosh box tuning. After it, I've had nothing but smiles for four years now (except for the rear TB boot blown off once).

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post #5 of 5 Old 05-06-2012, 10:41 PM Thread Starter
Join Date: Apr 2012
Location: Northern Virginia
Posts: 94
Thanks. Actually I did a revised post in the Vee section. Things became clear after I pulled my head out of my . . .

I actually never touched the fast idle adjustment. I had been turning the Secondary adjustment to try to balance the TBs and then mistakenly turned the right screw (but thought that was the fast idle adjustment). Once I took a step back (and took the tank off) things became much clearer.

On the plus side, it made me dive deeper into my new bike and I now have a better understanding of it. Throttle bodies balanced, secondaries squared away, and TPS checked and in spec. Also new plugs and replaced a very dirty air filter.

On the downside, the stumbling is still there, maybe a little better. And yes, it is looking like it is simply an EFI thing that I will just have to address with a PCIII or Yosh box. Still content it's tuned up and adjusted properly now, but will definitely still address the surging in the near future.
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