In early 2015 I decided to give Tubliss rimlocks a try on my DRZ400s.
Being mostly a street rider with a tiny amount of dirt road thrown in,
the motive wasn't off-road traction, but rather the ability to plug a 
puncture on the roadside. The experience of mounting tires and tubes in
the comfort of my garage made it abundantly clear that doing it on the
road would tax my ability and skill to the limit and beyond.

Tubliss rimlocks were fitted under brand-new Avon Distanzia tires. The
rear wasn't terribly hard to install and has given very good servcie, with
no problems to date. Air loss from the bladder is less than half a psi
per day, air loss from the tire is considerably lower. Altogether it's
been a success.

The front tire, in contrast, offered two major difficulties. First, the
1.6 inch wide rim gives very little space in the drop center to hold the
tire beads and Tubliss while mounting the tire. The tire has to be very 
slick and almost too hot to touch with bare hands to go on nicely, and
even then it's not easy.

Perhaps more troublesome, the front Distanzia proved to be a very tight
fit on the beadseat, so tight it won't stay in position without air pressure
in both the Tubliss insert and in the tire. Loss of pressure results in the
tire slipping back toward the drop center, which unseats the Tubliss insert
and aggravated the leak. If only the tire loses pressure, the upset is small
enough that the tire can be pumped up and ridden for a day or so, but if
the insert deflates too, the upset is big enough to completely unseal 
the tire. Getting it to seal again, even if only enough to ride a few
hours, is a major ordeal. 

In my case, after several days of struggle, I got the front Tubliss insert
sealed up and it performed perfectly for two years. At that point I got
complacent, and let the bike stand too long (two months). On checking,
the tire was flat and the bladder was at 87 psi. The tire and bladder
were brought back up to pressure, but the tire again went flat in a 
week with over 100 psi in the bladder. However, it was still rideable.

In an effort to recover the excellent leak-tightness enjoyed previously,
I tried to deflate the bladder and do a reset, per the instructions. The
tire bead slipped back into the drop and a week later the tire was still 
unrideable.

On disassembly, no defects were found in the Tubliss insert or bladder,
but I did notice two of the mold whiskers draped over the ridge that
appears to "bite" the inside of the tire to provide a seal. I'd wondered
about trimming those off during the original installation, but the
instructions said nothing so I didn't. In hindsight, perhaps I should have.
However, the fundamental problem remains: With this particular tire, the
bead isn't centered on the rim; one sector is misaligned by several mm
at zero  pressure and moves radially as the tire is inflated. 
The Tubliss insert can't follow that movement and retain a seal.

It still isn't a total loss; the bike was rideable until I deflated the
bladder, and if the tire had been an easier fit the seal might have 
recovered even from total deflation. The problem is finding a tire that
fits correctly: Far as I can tell it simply has to be tried. That's costly
in labor at a shop, and in tires for the home mechanic.

With a better-fitting tire  or a lot of effort  the Tubliss setup has 
merit, but identifying a "better" tire seems impossible short of trying it. 

After half a dozen cycles of resetting the Tubliss insert, the big leaks
finally cleared up enough to let me reassemble the bike. It remains to
be seen if the formerly excellent airholding is repeated.