Ok, one at a time.
75 FLH has sat for 15 years.
Should I put anything in the spark plug hole to help with lubrication while attempting to start, like oil, wd 40, marvel mstry oil?

 

Yes I would put some motor oil in the cylinders...and since you said the tank was drained 15 years ago in your other post...I would crank the motor over with the plugs out...til I verified oil flow.

 

Hey thanks, wasnt sure about putting anything in there. And yeah, probably be kickin the chit out of it, before it fires, as im not sure if the eternals are ok. Crossin fingers.

 

Well congrats on the bike. I think we would all really like a video of you trying to kick the bike over for the first time. And please leave the sound on so we can hear all the swearing. LOL. Just joking...sorta would be a good video though. Good luck

 

Thanks man, yeah not a bad idea, it'll be rated R as i do alot a cussing anyways. So give me about a month or so and ill do that video for ya.