Ok something not so new but new in the Harley thing is, and I am not sure why
Install an AFR gauge RIGHT NOW! and you will be the happiest you have ever been.'
Once there they are the ultimate addition and addiction.
Get a wide band-Amazon sells them.
This takes ALL the guesswork out it.
In fact, most people have no clue how to do a REAL plug check
(you have to kill the engine pull in the clutch coast to a stop and THEN you get a reading for what you were just doing.)
This is the caveman way and very time consuming and less than accurate, not to mention all the time used on the side of the roads is sort of dangerous.

 

 

 

Yup, about a 1/2 inch hole saw will do it on the back side of the front pipe (out of sight) and weld the bung in that comes with the kit.
The AFR is one of the best mods you will ever do to your bike.

 

 

Extremes?
IDK But from say 40s F to 100sF not much.
At least none that I have noted.

 

 

The above pic ^^If you can get real gas, and if you want to do numerous to plenty of stops and pull the plugs..
The AFR unit is the wave, .catch it

 

This plug is from a tuning with a Digital Wego AFR reader

 

So is that actual hardwood or that fake plastic stuff? Either way, I like the look.

My 1933 Cape Cod house in Sheboygan had maple hardwood on the 1st floor, I loved the look.