Yamaha Blaster YFS200T Owner's Manual page 117

1. Main jet number
Jet needle clip position
q
1st groove
2nd ( Standard )
3rd
4th
5th
8-16
Carburetor setting chart
Temperature Main jet
0°C (32°F) above
#230
(Standard)
+5°C –15°C
#230
–
(41°F) (5°F)
–10°C –30°C
#240
–
(14°F) (–22°F)
Changing the carburetor settings
Disassembling the carburetor
1. Turn the fuel cock to the "OFF" position.
2. Loosen the carburetor float bowl drain
screw and drain the fuel.
Jet needle Pilot air screw
2nd groove 1 1/2 turns out
2nd groove 1 1/2 turns out
3rd groove 1 1/2 turns out
q
1. Carburetor float bowl drain
screw