![Yamaha NEOS 50 YN50 (2002) [63/161] Inspection and repair](/img/pdf.png)
Yamaha NEOS 50 YN50 (2002) [63/161] Inspection and repair
![Yamaha NEOS 50 YN50 (2002) [63/161] Inspection and repair](/views2/1121427/page63/bg3f.png)
ENG
INSPECTION AND REPAIR
4-12
4. Remove:
• Cracking marks and carbon deposits on
piston sides.
5. Inspect:
• Piston wall
Wear/striping/damage
Change
6. Measure:
• Cylinder piston clearance
Steps for measuring the clearance of the
cylinder piston
First step:
• Measure the lower diameter “C” with a dial
gauge.
NOTE:
Measure the inner diameter of cylinder “C” in
parallel and at right angles to the crankshaft.
Then find the mean of the measurements.
• If this is outside the specified value, rectify
or
change the cylinder, change the piston and
the set of rings.
Second step:
• Measure the diameter of the piston skirt “P”
with a micrometer.
a 5.0 mm (0.20 in) from the inner edge of
the
piston
Wear
Standard limit
Inner diameter
40.0 mm 40.10 mm
of cylinder “C”
Taper
– 0.05 mm
“T”
Eccentricity
– 0.01 mm
“R”
“C” = Maximum D
“T” = (Maximum D
1
o D
2
) - (Maximum D
5
or D
6
)
“R” = (Maximum D
1
D
3
o D
5
) -
(Maximum D
2
D
4
o D
6
)
Содержание
- Service manual 1
- Índice 1
- Particularly important information 3
- Warning 3
- How to use this manual 4
- Gen info 5
- Illustrated symbols 5
- Insp adj 5
- Trbl shtg 5
- Carburation 6
- Chassis 6
- Electrical system 6
- General information 6
- General overhaul of engine 6
- Periodic inspection and adjustments 6
- Specifications 6
- Troubleshooting 6
- Chapter 1 general information 8
- Gen info 8
- General information 8
- Gen info 9
- General information 9
- Identification of the scooter 9
- Scooter identification 9
- Gen info 10
- Important information 10
- Gen info 11
- Important information special tools 11
- Special tools 11
- Gen info 12
- Special tools 12
- Gen info 13
- Special tools 13
- Gen info 14
- Special tools 14
- Chapter 2 specifications 17
- Specifications 17
- General specifications 18
- General specifications 19
- Maintenance specifications 20
- Maintenance specifications 21
- Maintenance specifications 22
- Maintenance specifications 23
- Cable routing 24
- Cable routing 25
- Cable routing 26
- Front break switch 26
- Chapter 3 periodic inspection and adjustments 28
- Insp adj 28
- Periodic inspection and adjustments 28
- Insp adj 29
- Introduction 29
- Introduction periodic maintenance lubrication intervals 29
- Period inspection and adjustments 29
- Periodic maintenance lubrication intervals 29
- Insp adj 30
- Rear bodywork and foo trest 30
- Rear bodywork and footrest 30
- Insp adj 31
- Installation 31
- Rear bodywork and footrest 31
- Insp adj 32
- Rear bodywork mud guards 32
- Rear bodywork mudguards 32
- Handlebar covers 33
- Insp adj 33
- Adjustment of engine idling 34
- Engine 34
- Insp adj 34
- Ajuste del juego libre del cable del acelerador 35
- Insp adj 35
- Insp adj 36
- Spark plug inspection 36
- Insp adj 37
- Inspection of engine oil level 37
- Change of transmission oil 38
- Change of transmission oil cleaning air filter 38
- Cleaning air filter 38
- Insp adj 38
- Cleaning air filter 39
- Insp adj 39
- Chassis 40
- Insp adj 40
- Insp adj 41
- Inspection of brake shoes inspection of brake fluid level 41
- Air bleeding hydraulic brake system steering adjustment 42
- Insp adj 42
- Insp adj 43
- Inspection of tyres 43
- Insp adj 44
- Wheel inspection inspection of rear fork rear shock absorber inspection 44
- Battery inspection 45
- Charge current 0 amps 10 hrs 45
- Electrical system 45
- Electrolyte density 1 280 at 20 c 68 f 45
- Insp adj 45
- Battery inspection 46
- Insp adj 46
- Insp adj 47
- Inspection of fuses 47
- Adjustment of headlamp beam replacement of headlamp bulb 48
- Insp adj 48
- Chapter 4 general overhaul of engine 51
- General overhaul of engine 51
- Engine removal 52
- General overhaul of the engine 52
- Removal of engine 52
- Engine removal 53
- Engine removal 54
- Disassembly engine 55
- Disassembly the engine 55
- Disassembly the engine 56
- Disassembly the engine 57
- Disassembly the engine 58
- Disassembly the engine 59
- Disassembly the engine 60
- Disassembly the engine 61
- Inspection and repair 62
- Inspection and repair 63
- Inspection and repair 64
- Inspection and repair 65
- Inspection and repair 66
- Inspection and repair 67
- Deflection limit c 0 3 mm clearance on big end side d 0 0 mm free play at small end f 0 0 mm 68
- Inspection and repair 68
- Inspection and repair 70
- Inspection and repair 71
- Assembly and adjustment of engine 72
- Assembly and adjustment of engine 73
- Crankshaft and crankcase 73
- Assembly and adjustment of engine 74
- Assembly and adjustment of engine 75
- Assembly and adjustment of engine 76
- Assembly and adjustment of engine 77
- Assembly and adjustment of engine 78
- Assembly and adjustment of engine 79
- Assembly and adjustment of engine 80
- Assembly and adjustment of engine 81
- Assembly and adjustment of engine 82
- Assembly and adjustment of engine 83
- Assembly and adjustment of engine 84
- Assembly and adjustment of engine 85
- Assembly and adjustment of engine 86
- Assembly and adjustment of engine 87
- Assembly and adjustment of engine 88
- Assembly and adjustment of engine 89
- Assembly and adjustment of engine 90
- Carburetor 92
- Chapter 5 carburetor 92
- Carburetor 93
- Carburetor 94
- Carburetor 95
- Carburetor 96
- Carburetor 97
- Carburetor 98
- Carburetor fuel cock 99
- Fuel cock 99
- Reed valve 100
- Reed valve 101
- Chapter 6 chassis 103
- Chassis 103
- Chassis 104
- Front wheel 104
- Front wheel 105
- Front wheel 106
- Front brake 107
- Front brake 108
- Front brake 109
- Front brake 110
- Front brake 111
- Rear wheel 112
- Rear wheel 113
- Rear wheel 114
- Rear wheel 115
- Front fork 116
- Front fork 117
- Front fork 118
- Front fork 119
- Front fork 120
- Front fork 121
- Handlebar and steering 122
- Handlebar and steering 123
- Handlebar and steering 124
- Handlebar and steering 125
- Handlebar and steering 126
- Handlebar and steering 127
- Chapter 7 electrical system 130
- Electrical system 130
- Electrical components 131
- Electrical system 131
- Electrical components 132
- Ignition and starter system 133
- Ignition and starter system 134
- Ignition and starter system 135
- Ignition and starter system 136
- Ignition and starter system 137
- Ignition and starter system 138
- Ignition and starter system 139
- Charging system 140
- Charging system 141
- Charging system 142
- Lighting system 143
- Lighting system 144
- Lighting system 145
- Lighting system 146
- Signalling system 147
- Signalling system 148
- Signalling system 149
- Signalling system 150
- Signalling system 151
- Signalling system 152
- Signalling system 153
- Signalling system 154
- Yes no 154
- Signalling system 155
- Yes no 155
- Chapter 8 location and repair of breakdowns 157
- Loc aver 157
- Location and repair of breakdowns 157
- Loc aver 158
- Trouble shooting 158
- Loc aver 159
- Trouble shooting 159
- Loc aver 160
- Trouble shooting 160
- Colour code 161
- Components 161
- Electrical diagram yn50 161
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