Honda 2004 XR400R Owner's Manual page 134

LEFT SIDE
(5)
(2)
(4)
(2) chain slipper
(3) chain guide slider
(4) chain roller
(5) depth
(6) wear inspection window
5. Replace the drive chain if chain slack is
excessive when the rear axle is moved to the
farthest limit of adjustment. Excessive slack
indicates the chain is worn beyond its service
limit.
To check the chain's service limit, remove
the drive chain (page
(3)
the distance between a span of
from pin center to pin center. If the distance
exceeds the service limit, the drive chain is
worn out and should be replaced.
(6)
New Chain:
Service Limit:
Drive Chain
128 ). Then measure
Measure a span of 108 pins
66.9 in (1,699 mm)
67.2 in (1,707 mm)
Servicing Your Honda
108 pins,
(cont'd)
125