Zenoah G5000AVS - Manual (Page 46)

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10. Maintenance
English
F30
4. Spark plug
Clean the electrodes with a wire brush and reset the
gap to .025 in. as necessary.
Replacement plug:
Champion RCJ-6Y or NGK BPMR8Y
5. Sprocket
Check for cracks and for excessive wear interfering
with the chain drive. If the wearing is found obviously,
replace it with a new one. Never fit a new chain on a
worn sprocket, or a worn chain on a new sprocket.
6. Front and Rear dampers
Replace if adhered part is peeled or crack is observed
on the rubber part.