Harley-Davidson

NGK Spark Plug for Harley-Davidson XL | 71-78

These are the NGK Spark Plugs for your Harley-Davidson XL | 71-78

Plug Gap Setting

0.04

Standard NGK Spark Plug

B6L

Premium NGK Spark Plug

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How to Check & Set Propper Gap for Your XL | 71-78 NGK Spark Plug.

Question:
What is the correct spark plug gap for a Harley-Davidson XL | 71-78?

Answer:
0.04

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