Okay, I need help with our SV650S. A few years ago it had sat long enough that the gas went bad and gummed up the carbs (among other things
) I got it back up and running at that time, but it just wasn't quite right. Over time, I've taken everything apart, soaked the carbs in cleaner, installed rebuild kits, re-jetted, and followed recommendations I found through lots of internet searching for the needle and fuel screw settings. The bike runs great at anything above idle....and there's the problem. It idles like shit.
Okay, I'm exaggerating a little, but the idle is enough of a problem that it detracts from the enjoyment of riding. At a stop, you have to occasionally give it gas or it will sometimes die.
Here's a description of its behavior. When you first let off the throttle when coming to a stop, it idles fine. After a short time, it will start to occasionally cough and stumble, the revs will surge a little, it'll idle okay for a second, then cough again, etc, while the overall idle speed drops.
I've checked the passageways, and shot both carb cleaner and compressed air through all that I could find, so I think (hope!) that's not the problem. I've also done my best to sync the carbs, to no avail. I'm about to give up and just take it someplace
If anyone has advice, please let me know. If you need any more information, or a video, just say so. I'm hoping this sounds familiar to someone, and you can tell me what I'm overlooking.
Thanks for any help, guys.