163
roundness
-
0.05
Top ring
0.015-0.05
0.09
clearance between the piston ring and
ring groove
Second
ring
0.015-0.05
0.09
Top ring
0.1-0.25
0.5
Joint face clearance
Second
ring
0.1-0.25
0.5
Piston outer diameter
39.97-39.99
39.9
Clearance of cylinder and piston
0.005-0.015
0.1
Piston
Piston
ring
Piston pin hole inner diameter
12.002-12.008
12.04
Outer diameter of piston pin
11.994-12
11.96
Clearance between piston pin hole and piston pin.
0.002-0.014
0.02
Small end inner diameter of the connecting rod.
14.016-14.034
14.06
13.2 Fault diagnosis
Low compression pressure
White fume in vent pipe
The piston is worn out
,
burnt out or broken.
The piston spring is worn down or damaged
.
The air and cylinder piston is worn out or damaged.
The piston and air cylinder is worn out or damaged.
The gasket is damaged; there is air leakage between the crankcase and the gas.
Compression pressure is too high
Piston noises
Carbon deposit in the combustion chamber is in overabundance.
·The air cylinder, piston and piston ring is worn out.
·The piston pin hole and piston pin are worn out.
13.3 Cylinder body
Summary of Contents for Race 50
Page 2: ...1 User s operation and maintenance manual for double wheel motorcycle RACE 50...
Page 20: ...19 Figure 1 34...
Page 22: ...21 RACE 50...
Page 23: ...22...
Page 45: ...44...
Page 50: ...49 Reinspect mobile oil level...
Page 57: ...56 high...
Page 64: ...63...
Page 66: ...65...
Page 67: ...66 Charging system...
Page 71: ...70 Bad act of voltage and current regulator...
Page 78: ...77 Ignition system...
Page 81: ...80 Avometer...
Page 83: ...82...
Page 88: ...87 Disassemble the body guard Disassemble the lead connector of the trigger...
Page 93: ...92...
Page 98: ...97 reads 0...
Page 104: ...103...
Page 116: ...115 Front wheel...
Page 131: ...130 Rear wheel 8 4 Rear shock absorber...
Page 133: ...132...
Page 142: ...141...
Page 148: ...147 Measure element outside diameter Allowable limit 2 61mm Carburetor...
Page 152: ...151...
Page 155: ...154 Idle speed injection nozzle Idle adjusting screw...
Page 159: ...158...
Page 161: ...160 Air cylinder piston...
Page 169: ...168...
Page 180: ...179 Retainer ring Friction plate...
Page 182: ...181 Loosen the compressor and decompose the clutch and driven wheel...
Page 189: ...188 Decelerator Function Transfer torque and decide final output torque and revolution...
Page 191: ...190...
Page 209: ...208...