NGK Spark Plug Finder
These are the NGK Spark Plugs for your Honda CM400C | 1981
How to Check & Set Propper Gap for Your CM400C | 1981 NGK Spark Plug.
Question:
What is the correct spark plug gap for a Honda CM400C | 1981?
Answer:
0.028
Get complete specs for your Honda CM400C | 1981 >