Honda CBR300R Manual page 109

Exhaust Pipe and Muffler
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.
Caring for Your Motorcycle
When the exhaust pipe and muffler are painted,
do not use a commercially available abrasive
kitchen cleaning compound. Use a neutral
detergent to clean the painted surface on the
exhaust pipe and muffler. If you are not sure if
your exhaust pipe and muffler are painted,
contact your dealer.
NOTICE
Even though the exhaust is made of stainless steel, it can
become stained. Remove all marks and blemishes as soon
as they are noticed.
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