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TECHNICAL DATA – ENGINE »
BASIC CARBURATOR SETTING
250 SX-F
Type
Keihin FCR-MX 3925D
Main jet 168
Jet needle OBETP
Idling jet 40
Main air jet 200
Idling air jet 100
Needle position 5
th
from top
Starting jet 85
Mixture control screw open 1.25
Slide 15
Performance restrictor –
Stop pump membrane 858 / 2.15 mm
Hot start device 2.5 mm
TIGHTENING TORQUES – ENGINE 250 SX-F
Hexagon collar screw, engine case, clutch cover, ignition cover, water pump cover
M6 10 Nm
Oil drain plug M12x1.5 20 Nm
Allen head plug, oil screen short M16x1.5 Oil + 10 Nm
Hexagon plug, oil screen long M20x1.5 15 Nm
Collar screw for oil filter cover M5 6 Nm
Plug pressure valve M12x1.5 20 Nm
Screws, oil pump cover M5 Loctite 222 + 6 Nm
Hexagon collar screw, cylinder / cylinder head M6 10 Nm
Cylinder head screw M10 Oil + 40/50 Nm
Hexagon collar screw, exhaust flange M6 Loctite 243 + 10 Nm
Valve cover screws M6 10 Nm
Camshaft screw M12x1 Loctite 243 + 80 Nm
Collar screw/nut camshaft bearing support M7 Oil + 18 Nm
Hexagon nut, primary gear M18x1.5 left Loctite 243 + 150 Nm
Nut for inner clutch hub M18x1.5 Loctite 243 + 120 Nm
Hexagon collar screw, clutch spring M6 10 Nm
Allan head screw, shift roller locking piece M6 Loctite 243 + 10 Nm
Hexagon collar screw, locking lever M5 Loctite 243 + 6 Nm
Locking screw for shift roller bearing M6 Loctite 243 + 6 Nm
Locking screw for main shaft bearing M6 Loctite 243 + 6 Nm
HH collar screw clip/tensioning rail M6 Loctite 243 + 10 Nm
Plug for chain tensioner M24x1.5 25 Nm
Hexagon collar screw, stator SX M5 Loctite 243 + 6 Nm
Hexagon collar screw, pulser coil M5 Loctite 243 + 6 Nm
Hexagon collar nut, flywheel M12x1 60 Nm
Hexagon collar screw, bump part kickstarter M6 Loctite 243 + 10 Nm
Cable retaining bracket (ignition) M6 Loctite 243 + 6 Nm
Allan head screw, kickstarter M8 Loctite 243 + 25 Nm
Hexagon collar screw, shift lever M6 Loctite 243 + 10 Nm
Hexagon screw, engine sprocket M10 Loctite 243 + 60 Nm
Spark plug M10 10-12 Nm
