Honda 2004 XR400R Owner's Manual page 137

Drive Chain
Lubricate only with SAE 80 or 90 gear oil.
Commercial chain lubricants may contain
solvents which could damage the rubber
O-rings.
Removal, Cleaning & Replacement
LEFT SIDE
(1) master link retaining clip
128
Servicing Your Honda
(1)
When the drive chain becomes extremely dirty,
it should be removed and cleaned prior to
lubrication.
1. Remove the master link retaining clip ( )
with pliers. Do not bend or twist the clip.
Remove the master link and O-rings.
Remove the drive chain.
2. Clean the side surfaces of the chain with a
dry cloth.
Do not brush the rubber O-rings. Brushing
will damage them. Use of a solvent may also
damage the O-rings.
3. Inspect the drive chain for possible wear or
damage. Replace the drive chain if it has
damaged rollers, loose fitting links, or
otherwise appears unserviceable.
Replacement chain:
D.I.D. 520V8 or RK 520MOZ6
1