31
6.10
The spoke wheel
The normal functioning of the bike, its reliability and the security depend on the following precautions:
Before each use, check the lack of cracks on the rims
Check the spoke tightening and tighten it again if necessary as explained in the
dedicated paragraph.
Make sure the wheel is not buckled.
Every time the tire or the rim is replaced by another, it has to be rebalanced. A non-
balanced wheel disrupts the road holding and shortens the length of the use life.
After the tire replacement, it is advised not to ride to fast, until the tire is well run.
WARNING
Never try to repair an old and cracked or a buckled rim! It must imperatively be replaced by a new one.
6.11
Transmission chain
The tension of the transmission chain has to be check before each use, and adjusted if it needs to be.
6.11.1
Check of the tension
1. Place the bike on a horizontal area and set it upright. Careful! There must not be any load on
the bike, during the checks.
2. Put the gearbox in neutral.
3. Make the bike move forward, in order to locate the place where the tension is at its
maximum.
4. Check the distance between the rubber chain-adjuster and the swinging arm as shown on the
diagram. The distance must be bounded by 9 and 11 mm
.
10 mm
Summary of Contents for 2008 SY-250FR 15thA
Page 1: ......
Page 3: ......
Page 4: ......
Page 54: ......
Page 57: ......
Page 61: ...4 1 Glossary ...
Page 64: ...7 3 Camshafts 3 1 Cylinder head cover ...
Page 65: ...8 3 2 Camshafts ...
Page 66: ...9 3 3 Removal points 3 3 1 Camshafts ...
Page 67: ...10 ...
Page 68: ...11 3 4 Inspection 3 4 1 Camshafts ...
Page 69: ...12 ...
Page 70: ...13 3 4 2 Camshaft sprocket 3 4 3 Decompression system 3 4 4 Timing chain tensioner ...
Page 71: ...14 3 5 Assembly and installation 3 5 1 Camshaft ...
Page 72: ...15 ...
Page 73: ...16 ...
Page 74: ...17 4 Cylinder head 4 1 Removal points ...
Page 75: ...18 4 2 Inspection ...
Page 76: ...19 4 3 Assembly and installation 4 3 1 Cylinder head ...
Page 77: ...20 5 Valves and valves springs ...
Page 78: ...21 5 1 Removal points 5 1 1 Valve lifter and valve cotter ...
Page 79: ...22 5 2 Inspection 5 2 1 Valves ...
Page 80: ...23 ...
Page 81: ...24 ...
Page 82: ...25 ...
Page 83: ...26 5 2 2 Valve spring 5 2 3 Valve lifter ...
Page 84: ...27 5 3 Valve clearance inspection and adjustment ...
Page 85: ...28 ...
Page 86: ...29 ...
Page 87: ...30 ...
Page 88: ...31 ...
Page 89: ...32 5 4 Assembly and installation 5 4 1 Valve and valve spring ...
Page 90: ...33 ...
Page 91: ...34 6 Cylinder and piston ...
Page 92: ...35 6 1 Removal points 6 1 1 Piston and piston ring ...
Page 93: ...36 6 2 Inspection 6 2 1 Cylinder and piston ...
Page 94: ...37 ...
Page 95: ...38 6 2 2 Piston ring ...
Page 96: ...39 6 3 Piston pin ...
Page 97: ...40 6 4 Assembly and installation 6 4 1 Piston ring and piston ...
Page 98: ...41 6 5 Cylinder ...
Page 99: ...42 7 Clutch ...
Page 100: ...43 ...
Page 102: ...45 7 2 3 Clutch spring 7 2 4 Friction plate 7 2 5 Clutch plate 7 2 6 Push lever shaft ...
Page 103: ...46 7 2 7 Push rod 7 3 Assembly and installation 7 3 1 Push lever shaft ...
Page 104: ...47 7 3 2 Clutch ...
Page 105: ...48 ...
Page 106: ...49 ...
Page 107: ...50 8 Oil filter element water pump and right crankcase cover ...
Page 108: ...51 ...
Page 109: ...52 8 1 Removal points 8 1 1 Impeller shaft 8 1 2 Oil seal ...
Page 111: ...54 8 2 5 Oil seal 8 3 Assembly and installation 8 3 1 Oil seal 8 3 2 Impeller shaft ...
Page 112: ...55 8 3 3 Right crankcase cover ...
Page 113: ...56 8 3 4 Kickstarter crank ...
Page 114: ...57 8 3 5 Water pump housing 8 3 6 Oil filter element ...
Page 115: ...58 9 Balancer ...
Page 117: ...60 9 2 2 Balancer ...
Page 119: ...62 10 Oil pump ...
Page 120: ...63 ...
Page 121: ...64 10 1 Inspection 10 1 1Oil pump ...
Page 122: ...65 10 2 Assembly and installation 10 2 1oil pump ...
Page 123: ...66 ...
Page 124: ...67 11 Kick shaft and shift shaft ...
Page 125: ...68 ...
Page 128: ...71 11 3 Assembly and installation 11 3 1Segment 11 3 2Stopper lever ...
Page 129: ...72 11 3 3Shift guide and shift lever assembly ...
Page 130: ...73 11 3 4Shift shaft 11 3 5Kick shaft assembly ...
Page 131: ...74 11 3 6Kick idle gear ...
Page 132: ...75 12 AC Magneto ...
Page 133: ...76 12 1 Removal points 12 1 1Rotor 12 2 Inspection 12 2 1AC Magneto 12 2 2Woodruff key ...
Page 134: ...77 12 3 Assembly and installation 12 3 1AC Magneto ...
Page 135: ...78 ...
Page 136: ...79 13 Crankcase and crankshatf ...
Page 137: ...80 ...
Page 138: ...81 13 1 Crankcase bearing ...
Page 139: ...82 13 2 Removal points 13 2 1Crankcase ...
Page 141: ...84 13 3 2Crankcase 13 3 3Crankshaft ...
Page 143: ...86 13 4 2Cranshaft ...
Page 144: ...87 ...
Page 145: ...88 ...
Page 146: ...89 14 Transmission ...
Page 147: ...90 14 1 Removal points 14 1 1Transmission 14 2 Inspection 14 2 1Gears ...
Page 148: ...91 14 2 2Bearing 14 2 3Shift fork shift cam and segment ...
Page 149: ...92 14 3 Assembly and installation 14 3 1Transmission ...
Page 150: ...93 ...
Page 151: ...94 ...
Page 153: ......
Page 157: ...5 2 Plastics ...
Page 165: ...13 9 Front brake ...
Page 167: ...15 10 Rear brake ...
Page 169: ...17 11 Steering ...
Page 177: ...25 17 Frame ...
Page 179: ......
Page 181: ...2 1 Electrical 1 1 Wiring diagram ...
Page 182: ...3 1 2 Spark gap test 1 3 Leads and ignition coil connection inspection ...
Page 183: ...4 1 4 Ignition coil inspection ...