2012 Stelvio NTX Fork seal replacement...

[Luap McKeever]

Take to dealer and let them do it, or do it myself?  I have tools, but not so much time or patience any more.  I called them, they said I'd be looking at about $100 per leg.  Sounds reasonable to me, but if I can do it easily enough myself, I would.  Honestly, I've never replaced USD fork seals.  How big of a deal is it?

[guzzisteve]

Not a bad job, bolt on bottom up underneath. It holds the cartridge, I put a bolt back in it w/wire attached and slide it down in to swap out seals, then pull it back out w/wire.
Price from dealer is ok takes hr ea side.

[MotoG5]

Did my own, not too bad a job. Easily done in an afternoon. I pulled the fork legs out of the triple tree one at a time and did them on the bench. Used a seal driver to set the main seal and plastic bags over the end of the tubes to protect the lip seals going on over the sharp edges. Keep a close eye on the direction of the seals when you take the old ones off. Easy to put new ones on upside down. Oh ya, loosen the top caps before you pull the legs out of the triple tree, kind of hard to do it with them off on the bench. Factory really tightened them up. AF1 has the correct kit, Aprilla #9100858, it is very complete but I just used the seals as the bushings and cartridge really didn't need to be replaced or rebuilt.   

[leafman60]

The chances are very high that you do not need a fork seal replacement. 

Many times when you see significant oil residue on the slider, you can arrest the weep with a cleaning of your existing seal.

Several vendors sell an inexpensive piece of plastic that is like a curved knife. You simply wedge it down between the seal lips and the slider and then work it around the perimeter of the seal and wedge it out.  It will clean anything accumulated behind the seal lip.

You can also make cleaner tool by cutting out a piece of plastic milk carton.

I'm sure there are several Youtube videos about this. 

I have done this to many bikes, including my '12 Stelvio.

https://www.youtube.com/watch?v=-lJH3nnw6mM

https://www.youtube.com/watch?v=8wlzfoVroSY

http://www.ebay.com/itm/like/181328019949?lpid=82&chn=ps&ul_noapp=true

[Luap McKeever]

Thanks for all the input. I've tried seal doctors to no avail. I'm 99% sure my left leg seal is bad. It has seeped since new, but is a steady drip now.

The chances are very high that you do not need a fork seal replacement. 

Many times when you see significant oil residue on the slider, you can arrest the weep with a cleaning of your existing seal.

Several vendors sell an inexpensive piece of plastic that is like a curved knife. You simply wedge it down between the seal lips and the slider and then work it around the perimeter of the seal and wedge it out.  It will clean anything accumulated behind the seal lip.

You can also make cleaner tool by cutting out a piece of plastic milk carton.

I'm sure there are several Youtube videos about this. 

I have done this to many bikes, including my '12 Stelvio.

https://www.youtube.com/watch?v=-lJH3nnw6mM

https://www.youtube.com/watch?v=8wlzfoVroSY

http://www.ebay.com/itm/like/181328019949?lpid=82&chn=ps&ul_noapp=true