Yamaha ET250D Supplementary Service Manual Download | Manualshive

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Summary of Contents for ET250D

Page 1: ..._YAMAHA supp Frame serial number 8J5 038101 8J5 049999 Engine serial number S246 038101 S246 049999 LIT 12618 00 22 8J5 28197 10 ...

Page 2: ...T250D c A Primary sheave For better clutch operation and durability a new clutch has been adopped 2 1 Primary fixed sheave C 2_ Primary sliding sheave 3 _ Bushing Large 4_ Cap 5_ Bushing Small 6_ Bolt 7_ Bolt 8_ Spring washer 20 9 _ Spider 10_ Slider 11 Pin with hole 4 12_ Plate washer C 13 _ Weight 14_ Collar 15_ Collar 16_ Bolt 17_ Plate washer 18_ Cotter pin 19_ Compression spring 5 20_ Cam 21 ...

Page 3: ...ub assembly tool to the primary sheave Tool name Tool No Sheave sub assembly tool 90890 01879 1 Sheave sub assembly tool c Loosen the six bolts securing the primary sheave cap and sliding sheave d Remove the sheave subassembly tool The primary sheave cap and sliding sheave cap now be disassembled 3 Inspection a Check the tapered ends of the crank shaft and primary fixed sheave for scratches If scr...

Page 4: ...h If excessively fatigued rep ace d Check the spider and roller for smooth movement and wear e Check both sheaves for warping If warped replace 4 Reassembly a Oil the points shown in the illustration Do not apply the grease on the portion of X mark For other parts greasing is unnecessary X Free from grease Greasing point CAUTION If the U nut or cotter pin is removed for the greasing replace it wit...

Page 5: ... primary sheave cap bolts and remove the subassembly tool Tightening torque 1 1 m kg 8 ft Ib CAUTION Make sure that the primary sheave cap assembly slides in contact with the fixed sheave boss 4 e Clean the tapered portions of crankshaft and fixed sheave f Fit the fixed sheave to the tapered por tion of crankshaft g Apply engine oil to the threaded portion of primary sheave bolt and its contact su...

Page 6: ...Starter The air duct is no longer provided because there will be no problem of overheating Ac cordingly the insert for mounting of the air duct on the starter case is no longer used 1 Air duct No longer used 2 Screw No longer used 3 Plain washer No longer used 4 Starter case NOTE The 1979 model can also be used without installing the air duct 1980 ET250D 5 ...

Page 7: ... exhaust pipe decarbonize 0 Spark plug condition gap and cleaning 0 0 Tightening of the cylinder head 0 DRIVE Tightness of bolts and nuts 0 0 Wear on slide runners 0 0 Primary drive system 0 0 V belt 0 0 Secondary drive system 0 0 Sheave distance 0 0 Sheave offset 0 0 Brake pad wear 0 0 Brake operation and adjustment 0 0 Guide wheel rubber 0 0 Wear of drive track wheel sprocket 0 0 Initial 100 km ...

Page 8: ...nd name 2 50 mil 500 mil 1 000 mil ENGINE Starter case 0 Oil pump control box 0 0 Aeroshell grease 7 A or Esso Beacon 325 grease Pump drive cover 0 0 Oil in the oil tank 0 YAMALUB E 2 cycle oil DR IVE Primary sheave weight 0 0 and roller pins Molybdenum disulfide Secondary shaft and 0 snowmobile grease sliding sheave 0 Front axle housing 0 0 Shaft 1 and shaft 2 0 Light all purpose grease Slide rai...

Page 9: ...9 6cc 1 81 cu in Compression chamber type Dome squish Head gasket thickness 0 5 mm 0 02 in Cylinder Material Cast iron sleeves aluminum cylinder Bore size 73 mm 2 87 in Taper limit 0 05 mm 0 0020 in Out of round limit 0 01 mm 0 0004 in Piston Piston skirt clearance 0 045 0 050 mm 0 00 18 0 0020 in Measuring point 10 mm from piston skirt end Piston over size 1st 73 25 mm 2 88 in 2nd 73 50 mm 2 89 i...

Page 10: ...iate jet I J 38 Starter jet St J 0 95 mm 004 in Fuel level F L 5 3 5 mm 0 20 0 14 in Idling engine speed 1 300 r min Main jet setting chart 30 C 20 C 10 C O C 10 C 20 C Altitud 1 22 F 1 4 F 114 F 132 F 150 F 168 F 138 Sea level 130 600m 12000 It 138 1 30 1200m 4000 It 138 130 1800m 16000 It 138 125 130 1 30 2400m 18000 It 12 5 125 3000m 110000 It or more 120 Change the Slow jet to 45 Change the sl...

Page 11: ...out Steering linkage type Lock to lock angle Steering column Right Lock to lock angle Steering column Left Lock to lock angle Ski Right Lock to lock angle Ski Left Front suspension Type Damper type Fuel tank Capacity Fuel grade V belt automatic centrifugal engagement 3 5 1 1 1 3 400 r min 90501 55559 Blue 90508 40080 Not painted 160 266 2 mm 10 47 0 08 in 11 1 mm 0 43 0 04 in 31 6 X 1 099 mm 1 24 ...

Page 12: ... in Spark plug cap Type Rubber type with noise suppressor Noise suppressor resistance 5 kn at 20 C 68 F C D I unit Model manufacturer 8H4 20 MITSUBISHI Lighting system Lighting output 12V l00W Lighting coil resistance 0 19n at 20 C 68 F Yellow Black Head light type Semi shield Bulb wattage q ty 12V 60 60W X 1 pc Tail brake light wattage 12V 8W 23W A C regulator Model manufactu rer TRIZ 24B HITACHI...

Page 13: ...1 0 M6 P1 0 M6 P1 0 M6 P1 0 M6 P1 0 M5 P 0 8 M5 PO 8 M6 P1 0 UNF 1 2 M8 P1 25 M8 P1 25 M20 P1 0 M12P1 25 M8 P1 25 M8 P1 25 M10P1 25 M10P1 25 M10P1 25 M12 P1 25 M8 P1 25 M8 P1 25 M8 P1 25 M6 P1 0 M6 P1 0 M6 P1 0 M10P1 25 M8 P1 25 M8 P1 25 M10P1 25 M10P1 25 M10P1 25 M10P1 25 M8 P1 25 M8 P1 25 M8 P1 25 12 Tightening torque 0 7 m kg 5 ft Ib 3 0 m kg 22 ft Ib 2 3 m kg 16 5 ft Ib 2 3 m kg 16 5 ft Ib 1 0...

Page 14: ...13 14 9 Tool No No Description Tool No 90890 03097 90890 01195 5 c Crank installer bolt adaptor 90890 01279 M 12 for Left 90890 03098 5 d Crank installer pot 90890 01274 90890 01803 6 Rotor holding tool 90890 01235 90890 01804 7 Sheave holder 90890 01880 90890 01806 8 Primary fixed sheave puller M18 90890 01881 90890 01817 9 Sheave sub assembly tool 90890 01879 90890 01848 10 Bushing tool 90890 01...

Page 15: ...itch GI y IGyi I L Y G I I I I I01il I 1 To wi h L B W I B w o Ignition coil Eo i wi h D rn G y Gy o L L Gy 0 l r COl magneto CO l unit Color Code G Green B Black q _J Beam switch Y Yeliow L Blue o Orange Gy Gray Voltage regu lator Br Brown B W Black White W R White Red U1 l J 2 G C G l J S 0 co o m l N J1 o o ...

Page 16: ...ecting 16 9 Taillight lead wire 17 o A B Ground lead wire 18 To C D I magneto 19 To headlight 20 Instrument panel grommet Hook band 21 Tighten hook with coupler holder 22 Main switch lead wire Tether switch lead wire Engine stop switch lead wire 15 I I Headlight beam switch lead wire Brake light switch lead wire Clamp 1980 ET250D I Tighten clamp with silencer bracket Engine cover Pass through insi...

Page 17: ...d diameter end faces upward 8 Clip 9 the pipe protector coil spring must be so positioned that its both end overlap at least one turn or the winding the nozzle of the carbure tor and fuel cock nozzle 10 Clip 16 11 To oil pump 12 Clip 13 Oil filter 14 Clip 15 Pipe protector must be touched fuel tank clamp 16 Clip 17 Route the decompressor wire so it is as much straight as possible 18 To fuel cock 1...

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