KOSO DB-03R Multimeter Installation on 1984 RZ350

[Baldwin53]

KOSO DB-03R Multimeter Installation

Koso DB-03R  Around $220 from eBay

Wiring
Looking at the back of the connectors, where the wires go into it, I labeled the pin locations from left-to-right, top-to-bottom, 1 through 6. The wiring for the Koso is as follows:

WHITE CONNECTOR
1                                       2 Grey/White (Oil Sensor)
3 Blue/White (Right Turn)    4
5                                       6

BLACK CONNECTOR
1 White/Black     ((Neutral)   2
3 Orange/Black (Left Turn)   4
5                                       6 Black (Ground)
(Yamaha colors not shown above)
The yellow high beam indicator wire is outside of the connector and uses a male bullet connector.
The White/Red white with bullet connector that is outside of the connector is for the catalytic converter and is not used when expansion chambers are installed.
Red wire to +12VDC
Brown wire to switched 12VDC
Tachometer - Black to ground and White to Zeeltronic Green/Black
I crimped and soldered all connections and used heat shrink tubing as needed.

The speedometer motion-sensor reed switch is a little green glass unit that sits below the speed speedometer on the underside of the factory instrument cluster. The switch senses motion in order to extinguish the turn signals automatically. I did not remove the reed switch from the cluster, which simply means that I manually cancel the turn signals.

Connectors
2 Each -6-pin 2.8mm spade-based non-latching connector pair, with terminalsVintage Connections
Connectors only come in the white color and you have to use an indelible marker to color one black.
Vintage Connections http://www.vintageconnections.com/Products/Detail/68 2 connectors, removal tool shipping and tax $20

Bullet connectors from any automotive store or, Home Depot.

Speedometer
A passive sensor is included, and it has to be no more than 1/8" from the magnets. If you have R6 calipers and adapter plates it's not a problem to mount. If you have stock calipers, the 10mm mounting bracket has to be modified (ground down) to fit in the space available or, use zip ties, hose clamps, whatever, and move it so it is in close proximity to the magnets. The optional BF640J06 active sensor is $35
Programmed to 120 MPH scale.

Water Temperature
The Koso includes a brass temperature sensor and extended wire but, you have to buy the hose adapter for it.
https://kosonorthamerica.com/product/water-temperature-sensor-adaptor/

Tachometer
Removed tachometer cable and drive gear from transmission, and installed a billet block off kit.
Block Off Kit from HVCcycle DTDBOP-RZ350 $22 plus shipping

The RPM pickup did not work when wired in series with the Dynatek dual coil. The black/red wire from my Zeeltronic CDI provides an output of one pulse per revolution. Program to 12,000 or 15,000 RPM scale as desired.

3rd Option - Wrap White wire (without any connector on it) around the spark plug wire at least 5 times and tape it with 3M 88 electrical tape

Oil Sensor (Injection)
The factory oil sensor should have 3 wires because it routes through the neutral switch. Mine only had 2 wires and I disconnected it to stop a false red indicator light.

Miscellaneous
I did not program shifting warnings or the enable it learn shifting.

Accessories
GPS Speed - P.N. KK000001 Speed signal converter kit $159 https://kosonorthamerica.com/product/gps-speed-signal-converter-kit/

[Kawtriplefreak]

Very cool!! Excellent write-up

[Baldwin53]

Thanks!

[Baldwin53]

Update: I tried several methods of attaching the passive speed sensor to the lower fork tube and there is no way short of Epoxying it in place that works. I abandoned the idea and ordered the Koso GPS adapter. Amazon had the best price, sold by MXSouth in Florida.