Dave wrote on 05/30/14 at 08:17:27:I have a VM36 - but I did not use the UFO as I had not seen anyone post results that they were really satisfied with the jetting when using it. Most struggled to get the Pilot jet and idle lean enough to run well. From what I understand you need to solder the pilot jet shut or use a tiny pilot jet, and most of the idle fuel supply come from the needle jet once the UFO is in place.
I have a self made muffler very similar to the DYNA flow I imagine, a large foam air filter, Wiseco piston, Stage 1 cam.
I ended up with a 195 main jet, needle on the second notch from the bottom, and a # 20 pilot on the Mikuni VM36.
It runs great.
If you can't get the idle speed to change with the screw - make sure your throttle cable is not holding the slide up too far. Make sure the throttle grip moves a tiny bit before it starts to pull the slide up.
There is some discussion in this thread about the UFO.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1262724030Dave
I just wanted to chime in with the following - when I first got the vm36, I was wrong about when the choke was on or off. There are a lot of conflicting pics/info out there. I was having the same problem, thinking that my bike was only running on choke. Turns out it was running perfectly fine with the choke off, but died when I choked it. Duh.
So I figured out how to make it start on choke by going up to a 20 pilot. This also fixed my fouling spark problem, but I noticed after long rides, the spark was getting a light tan - trending - towards - brown color. So I assumed lean when on the throttle. I was on a 195 main. Bumping up to a 200 main has done the trick, the spark plug is a nice light grey/barely tan on the insulator now. I should mention I have the UFO and a screaming eagle side cut exhaust.
It sounds like an old muscle car and pulls like a new one.
Hope this helps anybody that might be struggling? But it seems carbs are like fingerprints... no two are alike.