Bmw r18 rear Rotor help-

[themotomusafir]

This is my rear rotor. I happen to realize this today on my ride.... yeah I know.....

Can I resurface this rotor or would have to buy a new one?

I plan to order the ebc sintered brake pads online.

Thanks in advance for your suggestions.

 

[Rufus]

I’d put new pads in. With the rear wheel off the floor (however you do it), wipe down that disc, spin it and feel with your other hand and finger tips for any obvious nicks, use some fine wet n dry (say 2000 or 2500 grade) and dress them down. Looks like 95% of that disc is serviceable. Don’t say what mileage is on it but I expect there’s loads of life left in it. Change them earlier next time!

 

[themotomusafir]

Thank you. I have 6900 miles on the bike. So, I shouldn't buy a new rotor yet?

 

[Rufus]

I would say not. That mileage is nothing really. If it was me I’d clean it all up, put new pads in, spin the wheel and listen for any noticeable dragging or catching and as I said earlier if necessary just dress the discs with some very fine wet n dry. Take it out for a spin round the block, check it’s all ok and that the disc isn’t getting hot (i.e really or unusually hot from dragging). If not all good

 

[themotomusafir]

Got it. I should do a brake fluid flush too. It's recommended 2yrs and I had this bike brand new from 2021- never did it.

 

[themotomusafir]

I would say not. That mileage is nothing really. If it was me I’d clean it all up, put new pads in, spin the wheel and listen for any noticeable dragging or catching and as I said earlier if necessary just dress the discs with some very fine wet n dry. Take it out for a spin round the block, check it’s all ok and that the disc isn’t getting hot (i.e really or unusually hot from dragging). If not all good

You sure 2500 sand paper.... or is it 250?

 

[Rufus]

Not sure if you have the same system as us here in the UK. 2500 grade here is very fine, barely felt between finger and thumb, I found the discs to be a lot softer metal than I expected tbh and dealt with my issue no bother.

By a pack of papers (with a range of grades) because they are really cheap anyway and see what works for you. I would start off with the fine stuff first and go from there. A coarse grade paper will make a mess on the disc very easily. Drop me a PM if you want, if I can help I will.

 

[themotomusafir]

Any suggestions to get this bolt out. I unscrewed it but it is moving freely now

 

[Rufus]

Long nosed pliers

 

[themotomusafir]

Yank it hard?

 

[Rufus]

Yep. If the thread is fully unwound it’s just resistance you are feeling, they are necessarily a tight fit.

 

[themotomusafir]

Well it unscrews and moves freely after, you can tighten it again all the way.... but when you unscrew like 6mm threads come out and it just keeps rotating.

 

[Rufus]

Well, I have not had a need to work on the pads on mine yet but have changed pads dozens of times on many vehicles and bikes over the years and that’s what I would expect, a sharp pull to withdraw it. Perhaps someone else can confirm that. Can’t see why it would be more complicated.