Fuel Strip thought - K-Bikes.com - Excellence in Motion
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post #1 of 39 (permalink) Old Jan 5th, 2020, 8:09 pm Thread Starter
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Fuel Strip thought

Does anyone know or can find out if the newer K1300S float type fuel level sensor will work in a K1200s. I'm reading that so many people are replacing fuel strips just to have to replace them again in a few months or miles. My fuel strip has quit and I'm looking at replacing it, but if I'm just going to have to replace it again, I'm looking for a more permanent solution.
Did I see on this forum where someone had added a resistor to get the yellow triangle and flashing fuel light to go out?
It is annoying and if I'm going to use the odometer as a fuel gauge, I would like to get the lights cancelled. Seems a shame on supposedly a German engineered, technologically advance motorcycle they can't get a simple fuel gauge to work.

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post #2 of 39 (permalink) Old Jan 6th, 2020, 12:21 am
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I just bought a k1300s fuel level sending unit on the bay for $21 shipped to my door. The connector is identical to the strip they used on the K12s so will see how well it works and reads. Worst case I am out $21... best case we make this work and get rid one one of the quirks of these bikes.
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post #3 of 39 (permalink) Old Jan 6th, 2020, 1:55 am
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post #4 of 39 (permalink) Old Jan 6th, 2020, 9:28 am
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Fantastic - thank you! Will check this out before I install mine.
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post #5 of 39 (permalink) Old Jan 6th, 2020, 10:38 am Thread Starter
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Fuel Strip

Rtzx9r,

I have done the same. I ordered a used K1300s float sending unit off Ebay and I'm going to give it a try. I have looked up the part numbers on the K1300s for the sending unit and it appears the same part number from first K1300s on up is the same. Looking at the pictures of the K1300s sending unit with the normal float and resistor setup, there are two wires. These two wires would be the normal setup from one side of the resistor to the other, sending the the resistance values to the computer. The fuel strip has 4 wires. Two wires are from each side of the strip that reports to the computer and the other two wires are for a heater for the strip. The old school setup doesn't require a heater so these two wires are not needed. Now I don't know if the two wires from the resistor are in the same place on the plugs, so that will have to be determined and switched as needed. My other thought on this is the resistance value that the computer is looking for from the fuel level sensor (in our case weather it's the strip or the float). The computer is looking for a resistance value from the sending unit to determine how much fuel is in the tank. In the float version the float moves up and down in the tank moving the lever which tracks across some wire windings that sends a value to the computer. The strip would read the pressure of the fluid on the strip as the gas level goes up and down in the tank and sends a resistance value to the computer. So the question is if the resistance values from the old school float and the original strip are compatible or close in range. I don't know. If they are close, the metal support for the sending unit on the float version could be bent a little to make final adjustments (calibrating so to speak). My other thought on this is the resistance range. Hopefully someone who designed the software used the similar values. For example, if the strip uses values say 100 to 500 for its range and the computer is looking for something in this range as opposed to the float type sending unit was designed to use say 1 to 10 for it's value set. If needed a resistor could be added onto the the float type sending unit wiring to change the values to the range the computer would be looking for. Just thinking out loud so to speak. I don't really know, maybe someone has this information or can figure a way to find it. It is definitely worth pursuing to fix this problem. A good winter project for sure.

du907
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Last edited by du907; Jan 6th, 2020 at 10:57 am.
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post #6 of 39 (permalink) Old Jan 6th, 2020, 1:41 pm
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Quote:
Originally Posted by du907 View Post
Rtzx9r,

I have done the same. I ordered a used K1300s float sending unit off Ebay and I'm going to give it a try. I have looked up the part numbers on the K1300s for the sending unit and it appears the same part number from first K1300s on up is the same. Looking at the pictures of the K1300s sending unit with the normal float and resistor setup, there are two wires. These two wires would be the normal setup from one side of the resistor to the other, sending the the resistance values to the computer. The fuel strip has 4 wires. Two wires are from each side of the strip that reports to the computer and the other two wires are for a heater for the strip. The old school setup doesn't require a heater so these two wires are not needed. Now I don't know if the two wires from the resistor are in the same place on the plugs, so that will have to be determined and switched as needed. My other thought on this is the resistance value that the computer is looking for from the fuel level sensor (in our case weather it's the strip or the float). The computer is looking for a resistance value from the sending unit to determine how much fuel is in the tank. In the float version the float moves up and down in the tank moving the lever which tracks across some wire windings that sends a value to the computer. The strip would read the pressure of the fluid on the strip as the gas level goes up and down in the tank and sends a resistance value to the computer. So the question is if the resistance values from the old school float and the original strip are compatible or close in range. I don't know. If they are close, the metal support for the sending unit on the float version could be bent a little to make final adjustments (calibrating so to speak). My other thought on this is the resistance range. Hopefully someone who designed the software used the similar values. For example, if the strip uses values say 100 to 500 for its range and the computer is looking for something in this range as opposed to the float type sending unit was designed to use say 1 to 10 for it's value set. If needed a resistor could be added onto the the float type sending unit wiring to change the values to the range the computer would be looking for. Just thinking out loud so to speak. I don't really know, maybe someone has this information or can figure a way to find it. It is definitely worth pursuing to fix this problem. A good winter project for sure.

du907
You make the change in the bike zfe and dash, ie the computers to let it know wich type of fuel level sensor you have, no need to add resistors or cut wiring.

I recall having seen in my k1300s 2009 values under coding in motoscan about sensors, will look next time i get to the bike. Since the k12 and 13 are basicly the same bikes the siftware is the same just different values activted but all values are there for all K4x series bikes, even for policeversions. they are just not active but can be activated by a a single press on the button.

Jupp.
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post #7 of 39 (permalink) Old Jan 6th, 2020, 2:45 pm Thread Starter
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Mattias_r,

Your post sounds even more encouraging as to this might be a great permanent solution. I read the thread you posted and I have a question. What type of interface would you suggest to buy to make the changes in the zfe and dash. I have BMW cars and SUVs and have some OBDII software but nothing that can make those programming changes. I noticed in the thread several devices and programs for iphones, androids, and computers. I checked the links and most went to European sites. As I live the US I would be looking around here for a supplier.
What would suggest?
Thank you
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post #8 of 39 (permalink) Old Jan 6th, 2020, 2:52 pm
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Look up motoscan, it is an app for android and then a obd2 reader , i have the unicarscan ucsi2000 and a 10 to 16 pin adaptercable.

Jupp.

Last edited by Mattias_r; Jan 6th, 2020 at 3:12 pm.
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post #9 of 39 (permalink) Old Jan 6th, 2020, 5:49 pm
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Came by this on facebook just now. Fuel level sensor is pin 37 and 21 in the connector.
Hurry up and download.


https://drive.google.com/file/d/1gk9...4H6-KMsx5LJtsU
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Jupp.
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post #10 of 39 (permalink) Old Jan 6th, 2020, 8:29 pm
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Thanks for all the above support! Looks like I need to find an android device or a way to get motoscan working and then should be a fun challenge to try and make work. Regardless, if all of us can figure this out, itís a big win for our bikes that have bad strips.
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