1997 Yamaha YFM600FWAK ATV Service Manual, Page 198Get this manual
CARBURETOR
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a.Check: Free movement (piston valve) Sticks -7 Replace piston valve guide and piston valveInsert the piston valve into the carburetor body, and check for free movement9.Check: Free movement (throttle valve) Sticks -7 ReplaceCARBURETOR ASSEMBLY
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Before reassembling, wash all of the parts in clean petroleum based solvent
1.1nstall: Needle jet CD NOTE: _ Align the groove on the needle jet with the projection on the carburetor body Install the needle jet from the piston valve side