Why
don't more people use this product???? I hate to check my tire
pressure. You have to remember to do it when the tires are cold... the
rear tire is a pain to get to... the garage floor is dirty & gets junk all
over your knees... Generally a PITA (pain in the ...).
Kisan's tireAlert system takes the worry out of tire pressure. The
system includes magnetic sensors in place of the original valve stems, which
provide both tire
pressure
and rim temperature to transponders mounted on the bike with every revolution of
the wheel. The transponders are connected to a computer unit (shown as #3
in the picture of the tail of my bike, to the right), which uses the pressure
and temperature data to calculate the cold tire pressure of each
tire. That's right, it can tell you cold pressure regardless 
of
how much you've been riding! The temperature is then displayed on a small
unit on the dashboard (circled to the left, next to the RID on my bike).
That's what it does - but what about the installation, you ask? Does one need to be a Master Certified BMW Technician? Not at all! The hardest part of the whole installation is the replacement of the valve stems, in that it requires breaking the bead on the tires. I was not comfortable doing this myself, so I had the mechanic at my dealership do the stems for me. It cost maybe $30.00 in labor. There is a great article on the BMW-RA Web site showing the installation procedure, and honestly it doesn't look bad at all, if you have the right clamps.
Once that's done, you just need to install the transponders, computer, and
display. The computer's easy - velcro in the tail, and you're done.
The transponders and display come with adequate lengths of cable pre-attached,
with telephone-style plugs to hook into the computer. 
Let me make a very important point - Kisan provides an excellent, excellent,
EXCELLENT installation kit, with very clear installation instructions
for BMW motorcycles. The front sensor mounts on a modified bolt replacing
one of the front calipe
r
bolts (sensor circled in yellow, bolt in red). I had to use a bolt cutter
to remove about 1/4" of the shaft off of the end of the bolt, which is no
problem (as long as you have a bolt cutter around, I guess :-). The rear
sensor comes with a mind-bogglingly simple bracket that mounts in an existing
hex bolt hole on the rear swingarm (hardly visible, but circled in yellow.
The valve stem replacement, identical front and rear, is circled in red on the
rear picture). These are DIRT SIMPLE to install. The alignment is
rather forgiving; I just "eyeballed" the gap and alignment, and mine
worked perfectly the first time I turned it on.
Mounting the display involves drilling a hole, threading the cable through it, installing a C-clip on the back, and you're done. Just route cables from the sensors and display to the computer, hook up power, and you're ready to calibrate.
Once everything is installed, you simply follow the directions to tell it
what the current front and rear cold tire pressure is, and you're
done. Set it and forget it. Each time you start the bike, it will
establish the pressures and 
display
them within 1/4 mile of starting out. They will be constantly monitored
and updated on the display as you ride. If pressure on either tire drops
by 4psi, that tire's display will begin flashing - a drop of 6psi sets off a
flashing red LED next to that tire's readout. The display is nicely
backlit, and looks very much like it belongs next to the RID at night.
Overall, I'm very impressed and pleased with the tireAlert system.