Honda VFR800 Owner's Manual page 145

CLEANING
Clean your motorcycle regularly to protect
the surface finishes and inspect for damage,
wear, and oil, coolant or brake fluid leakage.
Avoid cleaning products that are not
specifically designed for motorcycle or
automobile surfaces.
They may contain harsh detergents or
chemical solvents that could damage the
metal, paint, and plastic on your motorcycle.
If your motorcycle is still warm from recent
operation, give the engine and exhaust
system time to cool off.
We recommend avoiding the use of high
pressure water spray (typical in coin-
operated car washes).
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Classic Cycles Technical Resources
High pressure water (or air) can damage
certain parts of the motorcycle.