Hey Ron,
I wish we had taken some better pics when the carbs were apart. You said that you thought those vacuum needles looked "different" to what you've had experience with. I was looking around on the Dynojet website and found this picture. This needle looks exactly like what was in her M600. The other bits even look familiar to me. What do you think?
Hard to tell from the picture. All the aftermarket needles I've seen have more of a taper than on the M600. The needle pictured looks more tapered than the Monster, but still not as much as I'm used to.
RichD told me that even the stock Mikuni needles have those cuts for the e-clip, so that may not be a good way to tell. Yours also had a big nylon disk under the e-clip, like a spacer. The photo doesn't show that disk. I'm thinking you guys have a stock setup, but Monster needles may just look a lot different from Jap bike needles.