My first write up. Not the best, did it after i installed the gauge. Please feel free to comment criticize and/or redo it.
DIY: Koso RX-2 gauge
Tools needed
Phillips screwdriver
5mm hex driver
4mm hex driver
8mm ratchet
Flathead screwdriver
First get your bike up on a bike stand or jack stands. I don’t have a bike stand so I use jack stands and they work just fine.
Now get those fairings off. Use a #3 screwdriver to remove the side covers and a 5mm hex driver for the seat.
Remove the battery cover with a #3 screwdriver and disconnect the battery.
Remove the two 5mm bolts on the side, the four 4mm bolts on the top, the three plastic rivets and one 4mm bolt on the inside of the fairings. Use a flathead screwdriver to remove the three plastic rivets on the bottom.
After removing all the bolts and clips pull the fairing back. It will pop out of the headlight fairing. Use a small standard screwdriver and unplug the blinker plug. Repeat and remove the other side.
Remove the front radiator ducting with a phillips screwdriver.
Alright now let remove the front headlight housing/fairing. Start by removing the four 5mm bolt around the gauge cluster. The two lower 4mm windscreen bolts and the two 5mm bolt on each side of the housing. (yes the rx-2 installed already)
Disconnect the headlight plugs and pull the housing off. Disconnect the speedometer cable by twisting it and unplug the gauge cluster. The remove the gauge cluster and shroud.
Now that you have the gauge cluster and shroud out, remove the three 8mm bolt holding the gauge cluster in.
That the three rubber grommets out of the universal bracket and place into koso panel and install panel into the shroud. Use the supplied hardware and bolt the koso panel in. Set to the side.
Now let’s install the sensors and run the wiring.
Remove the radiator cap and loose the upper radiator hose. Place a bucket underneath to catch the coolant and remove the upper radiator hose. Use Teflon or loctite and install the water temp sensor into the water temp sensor adapter. Cut the upper radiator hose in half and install the adapter in between the two. It is a very tight fit.
Install the oil temp sensor into the koso oil plug sensor adapter. Remove your old oil plug and install the koso one.
Use the temp sensor wire and run it along the bottom of the engine and up near the lower radiator hose to the gauge cluster.
Install the supplied magnets into the rotor bolts. Make sure the “N” is facing out. Install the magnetic pickup sensor with the bracket on to the brake caliper. Adjust the gap between the sensor and magnet to .8mm or .030”. Run the sensor wire along the brake line.
Run the supplied red power cable along the wiring harness from the front to the battery positive terminal.
Plug the koso harness into the ninja harness and secure to the wire bracket with zip ties.
Reinstall the gauge shroud and push the koso harness through the hole in the koso panel. Plug the harness into the rx-2 gauge and secure with the supplied screws.
Recheck your connects and reattach the battery cable. Turn key on, and check to see that everything works. The wiring on the koso plug and play harness, does not show the gas gauge. Enjoy your koso rx-2 gauge.
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