The OEM flasher relay in the left
rear of the relay box under the back of the gas tank looks
Despite the different colored
housings, they are the same part (61311459224) and are
interchangeable. Although they operate exactly the same, the
circuitry inside them is slightly different. Click the
thumbnails below to see the details.
Typical of many automotive
flasher relays, they have a built-in safety feature commonly
referred to as "hyperflash." This occurs when your
flasher relay senses that one of your turn signal bulbs has
gone out and lets you know that by flashing your turn signal
at roughly twice its normal speed. I'll skip the
details but this is why replacing your turn signal bulbs
with LEDs will cause hyperflash to occur.
However, you can disable the
hyperflash feature of a K bike flasher relay by removing the
circuit board from the housing and performing a very simple
Green Flasher Relay
How I did it: For
the green flasher relay I first pushed the U243B chip
towards the 1-4 pins to make 5-8 more exposed. Then I
used a small screwdriver to pry Pin 7 up out of the circuit
board and bend it out. I then used some small diagonal
cutters to cut off Pin 7.
Black Flasher Relay
How I did it: For
the black flasher relay I used the tip of a pushpin to break
Pin 7 and bend it up and out of the way.
Alternatively, you could flip the
flasher relay over and cut the trace that goes to Pin 7.
The 8-pin U243B and U2043B chips
made by TEMIC are "Warning or Car-Direction Indicator" chips.
This is the chip in your flasher relay that controls the hyperflash feature. Cutting Pin 7 disables the
hyperflash so that it will not be triggered by the use of
LED turn signal bulbs.
Here are the spec sheets for
notice that both list Pin 7 as the "Lamp failure detection"
© 2013 Drake Smith - Please do
not use or reproduce this elsewhere. Feel free to link
to it though.