Honda TRX420FPM Owner's Manual page 188

Appearance Care
Finishing Touches
Refer to Saf ety Precautions
After washing your ATV, consider using a commercially available spray
cleaner/polish or quality liquid or paste wax to finish the job. Use only a
non-abrasive polish or wax made specifically for motorcycles or
automobiles. Apply the polish or wax according to the instructions on
the container.
Exhaust Pipe and Muffler Maintenance
The exhaust pipe and muffler are stainless steel but may become stained
by mud or dust.
To remove mud or dust, use a wet sponge and a liquid kitchen abrasive,
then rinse well with clean water. Dry with chamois or a soft towel.
If necessary, remove heat stains by using a commercially available fine
texture compound. Then rinse by the same manner as removing mud or
dust.
Servicing Your Honda
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on page 97 .