1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 50Get this manual
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FUEL SYSTEM FLOAT LEVEL INSPECTION
Install the needle cl ip on the jet needle
(1) JET NEEDLE
STANDARD SETTING: 3rd groove from the top
Install the piston throttle