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Spark Plug
Clean the electrodes with a wire brush and reset the gap to 0.65 mm as necessary.
Sprocket
• Check for cracks and excessive wear interfering with the chain drive.
• If there is considerable wear, replace it with a new one. Never fit a new chain on a worn sprocket,
or a worn chain on a new sprocket.
0.6-0.7 mm
0.5 mm
Fuel filter
Summary of Contents for 721-340
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