Great follow on sixguns, best to blow the area clear of debris from ALL plugs regardless of conditions. Standard practice for "most" techs. Also important to fully compress the crush washer or your spark plug will loosen, then wallow out the receiver, the bottom threads will fill full of carbon and you'll never fully tighten another plug unless you tap and die your head which is NEVER fun. I've had to do this on several bikes, customers never want to pay to have the head removed so we try to tap and die using plenty of grease hoping to trap most of the shavings but you know they aren't all captured.

 

TKS Ron.
As I said after I bought this "second pile of junk M8",

I am going to try to make this one my "LAST" new Harley,
even if I have to take a 'Honder...................

 

The M8 now uses the same knock sensors as your Honders

 

So do the NGK plugs need the threaded terminal nut , or can the stock plug wire boot/terminal snap onto the threaded stud end of the 6263 plug? Trying to figure out if I need to go chase down terminal nut ends for the plugs... thanks

 

Plugs as required for OEM configuration. You don’t need to chase anything down.

 

Dielectric grease on one end and anti seize on the other. Cheap insurance

 

https://www.google.com/shopping/prod...XQ,prmr:1,cs:1

 

I always use copper anti-seize

 

I hear ya, thanks.. just trying to figure out if this works. Didn’t seem to “snap” on correctly..

 

The plugs should have come with the correct end on the terminal. Those don’t match