BMW K bikes (Bricks)

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George_Pap

George_Pap
Silver member
Silver member
Hey all.
I have rejected Motogadget;s Pro instrument mostly due to its design and ordered KOSO TNT-04 instrument combined with BEP 3.
Maru Labs provides nothing for the specific instrument and Koso has a decent documentation but i m a bit confused besides the lots of reading and researching so i kindly ask for any help available.

1. Neutral light.
I have already purchased 2 Gpi sensors so lets assume that i have a working GPI. 
Through Maru Labs documentation i have pin outputs for all 5 gears  + a neutral output. 
The critical question. 
As per instructions I should connect the neutral to my KOSO instrument input ( white wire )  Does the Koso instrument lites the N indicator by receiving 12v ( as the input that lites the N green bulb in the original instrument cluster? In the KOSO instructions next to the Neutral description it displays a minus (-) signal . I cannot get it clearly. 

2. Fuel lights ( 7L - 4L )
Koso has a configurable resistance setting so you can adjust according to your sensor. My K has the early thermistor type stick sender. Does anybody knows the Resistance Values ? ( Ohm ) ?
Thanks in advance 

Below is the Koso main wiring path.

Neutral Light / Fuel Light - Koso TNT-04 + BEP 3  Screen10


__________________________________________________
K100RT (Early 1985 -nonABS)
    

robmack

robmack
Life time member
Life time member
@George_Pap wrote:1. Neutral light.
The critical question. 
As per instructions I should connect the neutral to my KOSO instrument input ( white wire )  Does the Koso instrument lites the N indicator by receiving 12v ( as the input that lites the N green bulb in the original instrument cluster? In the KOSO instructions next to the Neutral description it displays a minus (-) signal . I cannot get it clearly. 
The "-" symbol beside the wire's functional name means active LOW.  That is to say, the neutral indicator on the gauge will light up when its input goes to ground level. The BEP is compatible with your gauge's requirements.

@George_Pap wrote:2. Fuel lights ( 7L - 4L )
Koso has a configurable resistance setting so you can adjust according to your sensor. My K has the early thermistor type stick sender. Does anybody knows the Resistance Values ? ( Ohm ) ?
The BEP has an an output pin labelled BAR that appears to output a fuel level signal compatible with your gauge.  I believe it will only indicate either all bars (full tank) or no bars (on reserve).  You won't get a continuously varying indication.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

George_Pap

George_Pap
Silver member
Silver member
thank you Rob!


__________________________________________________
K100RT (Early 1985 -nonABS)
    

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