Reinstall the jet into the carburetor and repeat as necessary. Air cleaner clogged, poorly sealed, or missing. S. I just got a range of main jets 330,320,310, 220-140 in increments of 5, and 100 but i don't have any other size pilot jets. Cylinder, piston or rings worn or broken. Symptoms of Lean and Rich. I thought another fouled plug, changed plug and that did not help. Choke; Your motorcycle carburetor pilot circuit has two adjustable parts, pilot air or fuel screw, and the pilot jet. But like I mentioned, the carbs need a total clean and kit installed. A generator will generally stall with the choke turned off if either there too little fuel relative to the amount of air, or too much air relative to the amount of fuel. Starter jet clogged or restricted. When the carburetor is out of adjustment, it means the air/fuel screw and the balance between two or more carburetors need to be adjusted. BTW our 144 runs stock pilot and main jets with the needle lowered one clip (leaner) and hasn't fouled a plug since I re-did the bottom end when we got it. Incorrect fuel level. Main Jet - Wide open. Sooo, I need to clean out the pipe(s). A leaky needle / seat will. 50:50 100 octane and pump premium with Maxima 927 at 50:1 BTW, two stroke oil choice is like chain cleaning. ... Clogged jets won't make it flood. Just use what you like. Reply. We run it on our favorite 50:50:50 mix. Piston ring/land clearance excessive Clogged jets are the number one reason a carburetor doesn’t work right. Look through the jets once they’re out and make sure you can see through them. Cylinder head nuts not torqued properly. There’s usually at least two in there; one is a primary jet and the other is a secondary jet. Check that the jet has been cleared by blasting compressed air through the jet. The fuel mixture can be made lean or rich by operating the screw controlling the flow of air or gasoline. 2 Stroke Carb Jet Cleaning 04-24-2016, 05:56 PM. 1998 S115TLRW I experienced power loss as rpms approach 3300. The air screw position determines this for you, making it very simple. Low compression: Spark plug loose or damaged threads. Pilot circuit. The emphasis here is to find a pilot jet that will run crisp without bog and without the main jet. Cold starting and warm up. On multicylinder machines, with separate carburetors for each cylinder, the following symptoms are typical of an adjustment problem: It is usually located near the back or air box side of the carb. Throttle slide with a cutaway. Fuel is metered through the main by the jet needle at different throttle positions. Incorrect jet sizes. Save Share. If it is more than 2.5 turns from closed, you need a smaller pilot jet. Jet needle and needle jet. Raced sunday and about 2/3 of the way, bike lost all its power. Choke circuit - Initiated by a valve or butterfly that increases the vacuum and opens the circuit up. I swapped the 330 jet that I had in originally for a 155 and the bike does the same thing. If your air screw is less than 1 turn from closed, you need a larger pilot jet. Incorrect adjustment can produce any of the previously noted symptoms. Remember, with a steady throttle approximately 1/8, there should be a distinct difference in RPM from 1 1/4 turns to 2 1/4 turns if the pilot jet is correct. A clogged main jet in the carburetor, a clogged pilot jet, stale fuel, or leaky gaskets around the carburetor are the most likely culprits. Turning in clockwise, will richen the pilot mixture. Noticed silencer full of goop on the end.. not typical 2t poop, but the grate was completely clogged and no smoke or exhaust coming out. Needle jet/jet needle - Mid range circuit. Main jet. If the jet is still clogged, pass a small, stiff wire through the jet and soak the jet for another 10 minutes. 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