YCF 50A (Right Crankcase Parts)
| 105 | YC50-20-105 | countershaft |
| 106 | YC50-20-106 | primary shaft |
| 107 | YC50-20-107 | oil screen |
| 108 | YC50-20-108 | washer φ8 |
| 109 | YC50-20-109 | bolt GB5787 (M8×12) |
| 110 | YC50-20-110 | crankshaft |
| 111 | YC50-20-111 | needle bearing |
| 112 | YC50-20-112 | oil seal φ30x17x1.0 |
| 113 | YC50-20-113 | cable clamp |
| 114 | YC50-20-114 | bolt GB5787 (M6×40) |
| 115 | YC50-20-115 | off gas pipe clamp |
| 116 | YC50-20-116 | off gas leading pipe φ6×9.5×300 |
| 117 | YC50-20-117 | timing gear |
| 118 | YC50-20-118 | clutch driven gear |
| 119 | YC50-20-119 | tensioner spring |
| 120 | YC50-20-120 | washer Φ6 |
| 121 | YC50-20-121 | tensioner pulley assembly |
| 122 | YC50-20-122 | stage washer |
| 123 | YC50-20-123 | bolt GB5787 (M6×18) |
| 124 | YC50-20-124 | oil sight glass |
| 125 | YC50-20-125 | O-ring φ8 |
| 126 | YC50-20-126 | Oil plug |
| 127 | YC50-20-127 | Central crankcase gasket |
| 128 | YC50-20-128 | Right crankcase gasket |
| 129 | 420H/10T | Sprocket(10T) |
