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2021.06.21

  80458-M   PAGE 3/9

When removing the cylinder head cover and cylinder head, take care not to damage 
the mating surfaces.
When disassembling, mark and store the disassembled parts to ensure that they are reinstalled 
in their original locations.

Remove the tappet covers.

Remove the bolts on the head cover.

Remove the head upper cover.

Put the bolt in the position shown in the figure and tighten the screw to raise the upper cover.

Remove the rubber gasket and dowel pin.

TAPPET COVER

GASKET

SCREW (M6X30 OR LONGER)

M6 HOLE

DOWEL PIN

RUBBER GASKET

  DISASSEMBLY

Содержание DT125

Страница 1: ...losion so work in a well ventilated area After having installed the new parts place check each part installed and tighten all nuts bolts and screws after having ridden 100km Regular inspection of part...

Страница 2: ...temperature gauge to control the oil temperature Keep under 110degree C Continuous running at high temperatures may damage the engine We recommend installing an oil cooler to keep the oil at the prop...

Страница 3: ...1 14 JOINT SPARKPLUG CABLE 1 15 RUBBER PLUGCAP 1 16 SPARK PLUG ER8EH 1 17 GASKET CYLINDER HEAD 1 18 GASKET CYLINDER 1 19 GASKET CRANKCASE 1 20 GASKET R CASECOVER 1 22 O RING G65 1 23 GASKET 12MM RUBBE...

Страница 4: ...worn parts replace them with new ones Perform the necessary work before assembly OIL OIL OIL 3 CRANKSHAFT ASSY 26 STUD BOLT A 197mm 27 STUD BOLT B 209 5mm 19 GASKET CRANKCASE STOCK STOCK 9 CAM CHAIN 1...

Страница 5: ...ssemble the piston rings to the piston Assemble the piston to the connecting rod Pay attention to the direction Install the dowel pin 8x12mm into the crankcase Set the cylinder gasket and 12mm rubber...

Страница 6: ...cylinder head cap nut When tightening the flange cap nut tighten it in diagonal order 3 CYLINDER HEAD LOCK 10N m Install the set screw on the exhaust flange of the cylinder head Set the dowel pin 8X14...

Страница 7: ...the mark on the cylinder head with the mark on the sprocket Make sure the piston is at top dead center CAMSPROCKET MARK 4 VALVE TIMING SPROCKET Attaching the cam sprocket to the cam chain OIL Adjust t...

Страница 8: ...e timing can be adjusted The standard fixing position is the one shown in the figure below Indicates the position of the bolt Advance the valve timing The engine characteristics will be slightly lower...

Страница 9: ...NG G65 36 WASHER SEALING 6mm 39 SOCKET PLUG Install the spark plug to the cylinder head Do not exceed the specified torque Replace the rubber at the end of the plug cap with the rubber from the kit Co...

Страница 10: ...Cylinder Head 1 1 2 21 22 25 24 25 24 23 19 16 10 11 9 8 7 6 4 15 18 14 13 12 3 17 20 5 10 11 10 14 13 12 9 8 7 6 1 CYLINDER HEAD UPPER LOWER 1 14 SCREW TRUSS M5x10 2 2 VALVE EXHAUST 2 3 VALVE INTAKE...

Страница 11: ...NAME QTY SPECIFICATIONS ITEM STANDARD LIMIT Cylinder Head Warpage Valve Valveguide Rocker arm I D Valve spring free length Valve clearance Valve stem O D Valve guide I D Stem to guide clearance Valve...

Страница 12: ...parts to ensure that they are reinstalled in their original locations Remove the tappet covers Remove the bolts on the head cover Remove the head upper cover Put the bolt in the position shown in the...

Страница 13: ...cker arm shaft Remove rocker arm and spring Remove the shim Remove the circlip and remove the idle gear Pull out the shaft and remove the O ring Organize each part so that it can be put back in its or...

Страница 14: ...t the beginning of this manual and if there is a problem replace the part with a new one Check that the bearing rotates smoothly and quietly by rotating it with your finger Check the surface of the pa...

Страница 15: ...KT7 013 Install the valve springs with the tightly wound coils facing the combustion chamber Lubricate the valve stems and insert the valve into the valve guide Install the valve spring retainer Insta...

Страница 16: ...the parts that come in contact Install the O ring on the idle gear shaft Install the idle gear shaft GREASE O RING P12 5 SHAFT IDLE GEAR Install the cam idle gear and circlip Apply oil to the bearings...

Страница 17: ...GE 11N m Assemble the cylinder head upper Check the tappet clearance Tappet clearance Standard value INT 0 08 0 03 mm EXH 0 10 0 03 mm If it is out of the standard value replace the shim and adjust it...

Страница 18: ...er head upper Torque value Hex socket bolt M6 Hex socket bolr M5 5N m M6X25 M6X25 M6X30 M5X25 M5X25 Install the cylinder head sidecover DOWEL PIN COVER HEX SOCKET BOLT M6 10N m M6X15 M6X15 M6X25 M6X25...

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