KEEWAY FACT 50 4T Maintenance Manual page 138

Measure the inner diameter of the right half drive wheel.
Limit for use: 20.05mm。
Measure the outer diameter of the sliding sleeve.
Limit for use: 19.94mm。
14.5 Clutch/driven wheel
14.5.1 Disassembly
Install the clutch sleeve with the fixer and remove fixing
nuts.
Remove the clutch sleeve, clutch/ driven wheel.
（从动轮：driven wheel 离合器外套：clutch sleeve 固定器：fixer 套筒扳手：socket spanner）
14.5.2 Breakdown of clutch
Remove the retainer ring and break down the clutch.
Note:
Do not stain the clutch facing with any grease during breakdown.
（挡圈：retainer ring 磨擦片：clutch facing）
138
Right half drive wheel
驱动轮右半
Sliding sleeve
滑套