stock front rotors

[dirtyharry]

I have a 92 FJ1200 with 40,000 miles.  I am doing a chassis service: steering stem bearings, clean and repack anything that moves.  I have access to full blown machine shop and was wondering if the front rotors could be removed, surface ground slightly, and then reattached to the centers?  Rotors are still in spec, but I figured while I had it apart, I would freshen up the surfaces.  They are factory riveted, I believe, and was wondering if there was a DIY and safe method to reattach them after surface grinding?  Any competent help would be greatly appreciated.

[ribbert]

I have a 92 FJ1200 with 40,000 miles.  I am doing a chassis service: steering stem bearings, clean and repack anything that moves.  I have access to full blown machine shop and was wondering if the front rotors could be removed, surface ground slightly, and then reattached to the centers?  Rotors are still in spec, but I figured while I had it apart, I would freshen up the surfaces.  They are factory riveted, I believe, and was wondering if there was a DIY and safe method to reattach them after surface grinding?  Any competent help would be greatly appreciated.

You can probably get the rivets somewhere but if the rotors are in spec, it's more trouble than it's worth. New front rotors are available for under $200 (a pair) when you need them.
I don't believe any one here has ever bothered, there's really nothing to gain from it.
Time and money would be better spent on other areas of your bike.

Noel

[dirtyharry]

I have a 92 FJ1200 with 40,000 miles.  I am doing a chassis service: steering stem bearings, clean and repack anything that moves.  I have access to full blown machine shop and was wondering if the front rotors could be removed, surface ground slightly, and then reattached to the centers?  Rotors are still in spec, but I figured while I had it apart, I would freshen up the surfaces.  They are factory riveted, I believe, and was wondering if there was a DIY and safe method to reattach them after surface grinding?  Any competent help would be greatly appreciated.

You can probably get the rivets somewhere but if the rotors are in spec, it's more trouble than it's worth. New front rotors are available for under $200 (a pair) when you need them.
I don't believe any one here has ever bothered, there's really nothing to gain from it.
Time and money would be better spent on other areas of your bike.

Noel

Thanks very much!  I guess I just have too much time on my hands!

[movenon]

No such thing as having to much time on your hands.......... Enjoy
George

[andyb]

Are they out of spec?  I don't know why you'd intentionally grind away at what is too thin for comfort in the first place.  Do they pulse and annoy when you brake?

Need shit to do and have time?  Mill the head some.  Do a good valve job.  Set the squish at 0.040/1mm.  Time the cams, after slotting the sprockets first.  Undercut the trans, up and down, all the gears.  Cross drill and lighten the shift drum. 

I mean, there's shit to do there.  If you're wasting time doing shit because you can, then do amazing shit because you can, yeah?  And then give me a yell and I'll send you a big pile of work to cope with....

It's like mom said.  "Never complain that you're bored or I WILL FIND YOU SOMETHING TO DO MISTER."  She wasn't fucking around, either.

[aviationfred]

wondering if the front rotors could be removed, surface ground slightly, and then reattached to the centers? 

I have no documentation to support this, but......I have always been told for motorcycle brake rotors. Once they get severely grooved, warped, and/or past the wear limits, they are throw away items.

Try searching for a motorcycle shop that will resurface a set of motorcycle rotors. I would bet a beer  that you will not find one that does.

You can get a Brand new set of Arashi rotors for less than $200.00 and not have to worry about thickness limits in 6 month.

Fred

[Country Joe]

Fred,
There actually is a company that regrinds  motorcycle brake rotors. .
www.truedisk.net
They charge $45.00 per rotor so you would tie up $90.00  plus shipping, for a pair of rotors that may just be .002 over minimum thickness. I guess if you had something very rare and couldn't get a new pair of rotors for $200 it might make sense.
Joe