Re: Lightning spark plugs
Hi TJ's that's about it. Here's what the book says:-
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Replace every 10,000 mile (16,000 km) service interval.
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Use only Harley-Davidson 10R12A spark plugs.
1. Remove left side air scoop to access front cylinder spark
plug.
2. Disconnect spark plug wire from front spark plug.
3. Using a 5/8 in. box end wrench and 5/8 in. spark plug
socket, remove front spark plug.
4. Remove seat.
5. Remove air cleaner assembly.
6. Disconnect spark plug wire from rear spark plug (use
automotive spark plug boot remover/installer if required).
7. Using a 5/8 in. wobble socket and 12 in. extension,
remove rear spark plug.
You probably have done it by now but better late than never