Sym HD 125 Service Manual page 107

9. FINAL DRIVING MECHANISM
Inspection of Final Driving
Mechanism
Check if the countershaft is wear or damage.
Check if the final shaft and gear are burn, wear or
damage.
Check bearings on gear box.
Rotate each bearing's inner ring with fingers.
Check if bearings can be turned in smooth and
silent, and also check if bearing outer ring is
mounted on gear tightly.
If bearing rotation is uneven, noising, or loose
bearing mounted, then replace it.
Check oil seal for wear or damage, and replace it
if necessary.
Check gear box cover bearing as the same way
above, and replace it if necessary.
Caution
If remove the drive shaft from the cover upper
side, then its bearing has to be replaced.
Check drive shaft and gear for wear or damage.
9-4
To this chapter contents
Oil seal
Bearing