If it's a fairly new gasket in there (sounds like it is), you should be able to reuse it. You certainly wouldn't be the first to do so. Also, the O/D indicator does not affect the ECU's reading of anything (that I am aware of). It's just a signal sent to the dash display. Mine has been twitchy for nigh on 10 years and 150000 kms. Same as the common fuel gauge top bar glitch.
The problem is not actually the dash O/D indicator, the problem is that the gear position sensor (GPS, ha) may not read properly in any case, so the ECU doesn't have a reliable indication I'm in 4th, etc. See post #9 in the "running issues" thread linked above.
I had a hint of this the other day. O/D indicator was coming on when I was in 1st and 2nd, just cruising around the neighborhood. I'm not sure what exactly caused that. Didn't happen yesterday. "Normally" the O/D light will flicker in 4th or 5th gear, but usually settles down and stays on when I have been in 6th for a minute or so.
I may install a de-restrictor, so that all gears are treated like 4th & the GPS reading doesn't matter. I feel comfortable enough with the bike and have been riding long enough not to do anything too stupid, so that I don't get into trouble with full engine power in 5th and 6th. I think.
The clutch cover gasket has been on there about 2 years, since that one time I rebuilt my water pump unnecessarily. I have had stator cover gaskets leak ever so slightly when I tried to re-use them, so I'm more or less resigned to replacing the clutch side one every stinkin' time. We'll see. I'm not in a huge hurry to drain the coolant so I can open the clutch side (ugh).
Meanwhile: recently I bought some used DL1000 wheels off a forum member. I am happy to report that the wheels appear undamaged, apart from the usual scratches from hamfisted tire changes (doubtless inflicted by the owner before the gentleman from whom I purchased the wheels).
Not only that, but I was able to locate a pair of used OEM brake rotors on eBay, as well as the special screws to secure them on the wheels, complete with factory thread locker. Installed those last night:
The rotors seem to be straight, and have plenty of "meat" left. About 4.8-4.9mm thickness, against a "replace me" spec of 4.5mm.
Yes, I know the tire has uneven wear and is basically trash. My bad for not looking more closely at the photos before I bought the wheels. All the same, the tire holds air just fine and will do, should I suddenly need a replacement front wheel.
I'll probably swap the pictured tire with a barely-used Dunlop Trailmax Mission I have sitting around (long story).