Brake Fluid Level

[LeftCoast]

Hi all,

Newbie question here. Will be doing a coastal ride in a few weeks on the 2015 RTL with 16k miles on it. When checking brake fluid level are you supposed to be able to see it through the side of the tank or do you have to remove the caps?

If I’m able to get the fluid changed in time if I go that route how much should I expect to pay?

One final question. As long as I put in dot 4 to bring it up to fill level does it matter what kind?

thanks!

P.S. The black residue has all been cleaned up