Honda CRF150F 2005 Owner's Manual page 117

Drive Chain
Lubricate only with SAE 80 or 90 gear oil.
Commercial chain lubricants may contain
solvents which could damage the rubber
O-rings.
108
Servicing Your Honda
Removal, Cleaning & Replacement
Your motorcycle has an endless (riveted master
link) type chain. It should only be removed or
replaced by your Honda dealer.
When the drive chain becomes extremely dirty,
it should be cleaned prior to lubrication.
1. 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.
2. 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. 520VD