HYOSUNG COMET 125 Service Manual page 28

NOTE
When replacing the drive chain, replace the
drive chain and sprocket as a set.
Loose the axle nut .
Tense the drive chain fully by turning both chain
adjusters , .
Count out 21 pins (20 pitches) on the chain and mea-
sure the distance between the two points. If the dis-
tance exceeds the service limit, the chain must be
replaced.
Drive chain
20pitch length 319.4 mm
Loosen or tighten both chain adjusters
chain has 20 30 mm of slack in the middle
between the engine and rear sprockets. The marks
, on both chain adjusters must be at the same
position on the scale to ensure that the front and rear
wheels are correctly aligned.
Drive chain slack
Service limit
256.5 mm
(12.58 in) (10.10 in)
, until the
20 30 mm (0.79 ~ 1.18 in)
PERIODIC MAINTENANCE 2-12