Ok so I was coming home from work i I hear noises when I hit my rear breaks. So I take a look and it’s time to do breaks but I also noticed that the inside of the rotor ( tire side ) about 1/2” to 3/4” on the outer edge is a bit rough and guess a new one is needed.
So the question is would it be easier to turn the rotor if you can or just put a new one on it
And then is there a certain bolt patter or are they all the same?

Then in my 1998 what break fluid would be in it?

 

Best to just get a new one.
To the best of my knowledge all the EVO rear brake rotors are the same.

As for what brake fluid to use your master cylinder cover should tell you what you're supposed to put in it.
My guess is Dot 5.

 

Get a new rotor (yes get the right one) and pads. BRAKE fluid. If you look on the master cylinder cover - front or rear it should have the DOT# on it.
THC commented while I was Typing.

 

New rotor, new pads. Change yer DOT 5 fluid.
Check yer front "breaks" too...

 

My first ever bike with discs was my first Harley, a new 1974 FX1200. The darned brakes were useless, especially in the wet, and only got a bit better when the braking surfaces wore to the point of looking like ploughed fields! So I wouldn't be in too much of a hurry to replace yours.....

 

I found a pic of you on your first bike!

 

Go with a stock rotor. My experience with a stainless steel rotors has Not Been good .

WP

 

That special (heavy duty as hell as I recall,) rear rotor on a 98 FLHTCUI is unique to the FL's. Harley spec'd minimum thickness numbers but I'd go with w replacement if you can find one

 

Here's one I made earlier! We've actually seen this, in the Ljubljana museum.

 

My bike I have no problem with stopping, I have to be careful so I don’t lock it up. I do think it is to much but will check and see if Indy has one or can get me one since for the heck of it I called the dealer and was quoted $230 plus tax, ouch. If the Indy doesn’t then I’ll order online.