1985-1986 Honda ATC250R Shop Manual, Page 53Get this manual
FUEL SYSTEM ALTITUDE AND TEMPERATURE ADJUSTMENT The carburetor must be adjusted for altitude and temperatul'e according to the chartSTANDARD SETTING: Main jet No.142 Jet needle THROTTLESTOPSCREW
2N groove
FUEL TUBE
AIR SCREW
142 3RD turns tums out =145 4TH
Jet needle setting
Air screvv
'opening
gl Main jet 80,- -Jet needle setting Air screw
-1;';-2 out turns
2 tums +;145 3RD!
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