KYMCO Downtown 350i Repair Manual page 203

4.Engine
Downtown 350i
Remove the intake plate and gasket from the cylinder head.
Use a 17 mm wrench to remove the water temperature sensor if needed.
Clean the combustion chamber with contact cleaner, a plastic knife, brush and/or
rag. Take care to only remove carbon and not scrape the head.
To to remove the valves see the Valves topic.
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