Yamaha MX250 - Page 106

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SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
Pilot outlet 0.9 mm (0.035 in) (MX250)
0.8 mm (0.031 in) (MX300)
Valve seat size 1.6 mm (0.062 in)
Main nozzle 6B (MX250)
6A (MX300)
Pilot jet 0.41 mm (0.016 in) (MX250)
0.44 mm (0.017 in) (MX300)
Pilot screw 1-5/8 turns out (MX250)
2 turns out (MX300)
Throttle valve 18 
Float height 13.8 mm (0.54 in)
Governor arm:
Tension spring attach hole 2
Engine speed:
High engine speed 3750–3850 r/min
Low engine speed 1900–2100 r/min