Oh boy, I think i need to pull some oil out of mine. Just did my 1st oil change. (screw the dealer) I put a gallon of Rotella T6 in it with a new Fram filter. Think I will pull it back to 3/4 of the sight window.
To think a dealer or a professional shop would not make mistakes, especially when most are hiring young kids to do the routine tasks like oil change, would be naive.
I bought a 2008 V-Strom with 4300 miles couple of months back and it had the 4000 mile service done by the Suzuki dealer. I am looking at the receipt/work order and the oil window and the entire window is full! The oil was covering the entire window! Like this one:
I ended up test riding it that way but when I got it home, I ended up draining over half a quart of oil to make it come down to "full" line. Running the bike a little over the "low" line is way better than running it a little over "full" line, imho.
I use a rear wheel stand ($25-$50) to level the bike and also make it easier.
I initially put just 3 quarts. Let the bike run for 3-5 minutes in gear on the rear stand or ride it around for a few minutes. Then shut it off, wait like 30 minutes or so, then check the oil level again.
Bike has to be leveled on both coordinates and handlebar straight. Besides leveling the bike sideways, it also cannot be on a uphill/downhill type surface.
I typically end up putting 3.5 quarts with a new filter.