Drive Chain - Honda CRF125F 2021 Owner's Manual

DRIVE CHAIN

Refer to the Safety Precautions on page 55.
The service life of the drive chain (1) is
dependent upon proper lubrication and
adjustment. Poor maintenance can cause
premature wear or damage to the drive
chain and sprockets.
The drive chain should be checked and
lubricated as part of the Pre-ride Inspection
(page 43). Under severe usage, or when the
motorcycle is ridden in unusually dusty or
muddy areas, more frequent maintenance
will be necessary.
Inspection:
1. Turn the engine off, place the
motorcycle on its side stand and shift the
transmission into neutral.
2. Check slack in the lower drive chain run
midway between the sprockets.
Drive chain slack should be adjusted to
allow the following vertical movement
by hand:
25 – 35 mm (1.0 – 1.4 in)
76
3. Roll the motorcycle forward. Stop.
Check the drive chain slack. Repeat this
procedure several times. Drive chain
slack should remain constant. If the
chain is slack only in certain sections,
some links are kinked and binding.
Binding and kinking can frequently be
eliminated by lubrication.
Excessive chain slack may allow the drive
chain to damage the engine cases.
(1)
(1) Drive chain