After many miles the windscreen
switch built into the left combination switch of later
K1100LTs can become sticky and/or unresponsive. It is
possible to take the switch apart and rehab it so that it
functions "like new" again.
If you have an earlier K75RT or K1100LT
with the windscreen switch in the center of the handlebars
then instructions on how to rehab that switch can be found
There are many tiny bits (screws, springs, pins and
a ball bearing) that can be easily lost when doing this.
Therefore, I strongly advise that you remove the switch from
the bike and do this at your workbench because if you
drop and lose any of these tiny parts in the garage then you have
just made useless a switch that costs $270 new from a
If you want do do this "in situ"
on the bike then placing a shoebox or similar container
under the switch while working on it is a good idea to catch
any tiny parts that might get dropped. (But you really
should do it at the workbench.)
Remove switch from clutch perch: There's a
small Phillips screw at the bottom center that holds the switch to the clutch
perch. It can be sticky so
use a good screwdriver and apply lots of pressure to initially
break it free. If you don't then you might strip the head of
After that one screw is removed
the switch lifts off of the clutch perch.
You'll then need to remove the
gas tank to disconnect the switch from the main wiring
harness so that you can take the combination switch to the
Remove the turn signal and horn buttons: The
turn signal button is held on by a small Phillips screw in the
back. Once this screw is removed you can wiggle the button
The horn button is held on by a
small screw that can be accessed via a hole inside the back
of the switch assembly. It's easiest to to do this if you
depress the horn button while removing the screw. Note the
spring and rod where the horn button mounts. (When putting
the horn button back on the long end of the pin goes into
the switch, the short end goes into the spring in the
Remove the 5 screws that hold the switch together:
There are different types of Phillips screws used so note the location of
each screw when removing them.
Remove the switches from
housing: The switch is comprised of two
switch subassemblies, one switch for the headlight hi/lo and
the other switch for the windscreen up/down.
The headlight switch should just
slide out. To remove the windscreen switch push up on the
bottom of the switch button and wiggle it out of the
Push the pivot pin out: The windscreen switch
pivots on a pin in its center. While pushing down on the
center of the button, push that pin out with a sturdy pin or
tiny screwdriver. If the pivot pin has worked its way
partially out like the one shown below then needle nose
pliers can be used to extract the pin.
Be careful at this stage as this
is when a small ball bearing can escape and roll off into
The windscreen switch re-centers
itself via a spring and ball bearing on one side. The middle
of the "V" shown below is the neutral switch position.
Clean and lubricate: Clean out any dirt or
dust that has accumulated in the "V."
There are momentary
micro-switches at the top and bottom of the windscreen
switch. Spray some silicone lubricant into each one of those
from the side.
Reassemble the switch:
Place the ball bearing in the bottom of the "V" and put the
spring back into the switch button. Push the button back on
and wiggle it around until you can push the pivot pin back
through. Make sure that the pivot pin is side-to-side
centered in the button.
Lubricate the headlight
switch: Similar to the windscreen switch, the
headlight switch pivots on a pin. It has some tiny springs
and other small movable parts in it. Unless it is having
serious issues it is not worth taking apart. Just spray some
silicone lubricant into the sides of it and cycle it a few
Reassemble and reinstall:
Put the two switches back into the housing and reinstall the
five screws that hold the switch together. Then reinstall
the horn and turn signal buttons. As with disassembly, it's
easiest to put the horn button screw in if the button is
© 2021 Drake Smith - Please do
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