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Adjust Carburator Yamaha Big Bear 350 Carburetor Adjustment, Carburetor Adjustment

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Hi all1994 big bear 350….Removed and disassembled the mikuni btm carb to clean it out…reassembled…have a question reguarding the pilot screw setting (the one on the bottom of the carb)…does anybody have an idea what the factory setting is for this is? ie…how many turns do i back it out? also any helpful tips reguarding setting this screw properly would be helpful…thanks!Mike

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Start at 2-1/2 to 2-3/4 turns out as a starting point. Then start the engine and see how it runs. Turn out the screw more if engine runs cleanly at idle rpm. Keep turning out SLOWLY until idling becomes erratic. Then turn needle back in 1/4 to 1/2 turn.If idling is erratic from starting point, turn in needle slowly until idling smooths out.
2003 Grizzly 66030″ s/w Maxxis Zilla”s on Vision wheels (summer tires)27″ s/w Titan 589 on stock wheels (winter tires)2.0 mm Primary ShimDalton Metallic Red Secondary SpringHigh Strength AxlesWarn 2500 lbs winchGrizzly 700 cam plate (no performance improvement, just better non-wearing slide design)

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2003 Grizzly 66030″ s/w Maxxis Zilla”s on Vision wheels (summer tires)27″ s/w Titan 589 on stock wheels (winter tires)2.0 mm Primary ShimDalton Metallic Red Secondary SpringHigh Strength AxlesWarn 2500 lbs winchGrizzly 700 cam plate (no performance improvement, just better non-wearing slide design)
whats the best tool to use to adjust this screw while the carb is on the machine? I cant even fit a small screw driver in to make adjustments

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I don”t have my Griz finished yet but on some of my other rigs with this same setup I made a special tool for it. I took a 6 penny nail, flattened the end out with a hammer, filed the end square then bent that end 90 degrees about 3/8 of an inch long. Good tool for your tool kit.
I just use a flathead screw bit it’s small enough to get under there you don’t have to make a special tool if your out and about

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