1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 35Get this manual
MAINTENANCE Inspect the drive chain and Q.rings for possible wear
or damageReplace the cha in, if it is worn exces
sively or damaged,
Measure the drive chain length with the chain held
that all links are straight
41 PIN LE NGTHSTANDARD508 mm (20.0 in SER ICE LIMIT513 mm (20.2 in )
40 PITCHES (41 PINS)
Inspect the sprocket teeth for eXC1!ssive wear or
damageReplace if necessaryNOTE