RedBaron357

If it were to arrive at my shop with the listed statements I would go as follows: Check Compression/Leakdown - Not that I think the complaint leads me to believe that there is a mechanical issue, it's just good practice. Something so simple is tight valves can cause all sorts of fun when diagnosing running issues. If you haven't checked those valves lately it wouldn't hurt, it is a normal maintenance item. Verify spark - Typically this Japanese stuff is pretty good about a healthy spark. Most of the time it works or it doesn't. That's not saying crazier things don't happen, but generally it's good if it sparks. Passing those early checks, your description really seems to sway my opinion towards a fuel system issue. I'd have probably asked you a few more questions on write-up, mainly trying to dig for information about what way it was running poorly when it was running, but a unit that doesn't start at all is telling in itself. The air cleaner should be clean, oiled, and well sealed to the box. The airboot (between the carburetor and airbox) should be free of cracks and fully installed on the carburetor and airbox. Your issue probably isn't in these areas but it's always good practice to check. Verify that your fuel tank cap vents. It needs to be able to flow air into the tank for fuel to leave at the bottom. This doesn't typically create a permanent no-run condition, but can create a fuel starvation issue while riding. Grab a ratio rite cup or clear bottle and prepare to drain fuel from your petcock into it. It's hard to tell the correct fuel flow rate by describing it here, but it should flow a steady stream expected by the petcock outlet size. If the petcock is not flowing or flowing all of the time just go ahead and get a new one. Even a full time flowing one can potentially create big issues. Retain the drained fuel for inspection. If within the next hour or so you notice layers of different liquids in it or trash in the bottom go ahead and plan on draining your tank. It's a good time to mention that non-ethanol fuel is what you should run if at all possible all of the time. Forgive me for suggesting to get back into the carburetor, but at this point it'd be a good time for it. No offence intended, but to a shop a customer cleaned/inspected carburetor is just a carburetor that needs to be removed and inspected again. It's easy to get it wrong unless you're very thorough. Inside the carburetor you have a few different fuel circuits to deal with. First remove the float and its needle. If the needle has any sort of ring visible around its rubber tip when dry it should be replaced, a fuel leak is not far behind. The passageway that needle goes in should be free of obstruction between that orifice and the fuel hose inlet. If you've messed with the float height (Bending the tab on the plastic float) since the unit has last ran well it'd be good to check the installed height versus the service manual settings. The pilot circuit will consist of an air inlet in the air side carburetor throat typically, a pilot jet inside the bowl area, and a pilot screw externally. Lightly thread the screw in to verify its position from seated and then remove it, its spring, and the washer and o-ring that go on it. Remove the pilot jet. When dry a little speck of light should just be visible through the jet. If not, do not clean it with a drill bit. A wire pulled from a wire brush and some contact cleaner typically works wonders. Spray contact cleaner through the air inlet to verify it reaches the jet orifice, then spray through the jet orifice looking for fuel to exit the pilot screw orifice and perhaps its hole and bypass holes in the carburetor throat (engine side). If I were a betting man, I'd bet you've already found your problem by this point. Still if you're this far in make sure that everything else is spotless and correctly installed. While you're at it pull the intake manifold off the engine and check its seal and rubber condition. That never hurts. If all of that is good, then you're into the strange stuff category. A little light through that pilot jet, remember that. Carb spotless and choke, slide, needle all working normally. I hope this helps. If it doesn't I'll check back soon to see what you've found.