Honda CRF250F 2023 Owner's Manual page 112

Lubrication
Lubricate every 300 miles (500 km) or sooner
if chain appears dry.
The O-rings in this chain can be damaged by
steam cleaning, high pressure washers, and
certain solvents.
Recommended lubricant: Pro Honda HP Chain
Lube or equivalent.
Commercial chain lubricants not designed for
motorcycle drive chains may contain solvents
which could damage the O-rings.
Drive Chain
Servicing Your Honda
103