Honda TRX400X Owner's Manual page 154

Drive Chain
Lubrication
Refer to Saf ety Precautions on page 77 .
Lubricate every 30 days of riding or sooner if chain appears dry.
Lubricant: Pro Honda HP Chain Lube or an equivalent chain lubricant
designed specifically for use on O-ring chains.
Commercial chain lubricants not designed for motorcycle drive chains
may contain solvents which could damage the O-rings.
Servicing Your Honda
146