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These are the NGK Spark Plugs for your Suzuki GS400 | 77-78
How to Check & Set Propper Gap for Your GS400 | 77-78 NGK Spark Plug.
Question:
What is the correct spark plug gap for a Suzuki GS400 | 77-78?
Answer:
0.032
Get complete specs for your Suzuki GS400 | 77-78 >