09-28-2015, 10:32 PM
photos provided by Popgun
Ok, in the center/rear bottom of your fuel tank is where the fuel pump/float unit is mounted
[url=http://smg.photobucket.com/user/theferret111/media/sendingunit_zpsbddeca05.jpg.html]![[Image: fa60256df2f5f83d809cc5a3c31e042a.jpg]](https://cb1100forum.net/forum/uploads/imp/201509/fa60256df2f5f83d809cc5a3c31e042a.jpg)
here is the fuel pump/float unit for the fuel gauge
[url=http://smg.photobucket.com/user/theferret111/media/sendingunit1_zps5341a6ba.jpg.html]![[Image: ca58d84aca2b0e5acd497bf6a1704be6.jpg]](https://cb1100forum.net/forum/uploads/imp/201509/ca58d84aca2b0e5acd497bf6a1704be6.jpg)
Here is the sending unit. There is a contact that rotates over the 6 strips on a plate, and as the fuel level rises or falls the arm floats lower or higher in the tank and the angle of the arm makes the contact points different for the fuel gauge to read.
[url=http://smg.photobucket.com/user/theferret111/media/sendingunit2_zps4a6e8c21.jpg.html]![[Image: f917fd9906bbb5f0b3185f39e3b34423.jpg]](https://cb1100forum.net/forum/uploads/imp/201509/f917fd9906bbb5f0b3185f39e3b34423.jpg)
Which is another good reason for using Trip B for tank mileage. In the morning when I start the bike on the side stand, while it is warming up I look at the gauge and the gauge may be showing 3 bars or 1/2 tank of fuel (since there are 6 bars right)? Cycling to Trip B shows me there are actually lets say 135 miles on that tank which is about 15 miles before going to 1 bar and 35 miles to going on flashing reserve, so there is no way there is really 1/2 a tank in there as indicated, and I will need to stop for gas before heading away from the service stations. Of course once you straighten up and ride it soon drops to the proper number of bars.
Ok, in the center/rear bottom of your fuel tank is where the fuel pump/float unit is mounted
[url=http://smg.photobucket.com/user/theferret111/media/sendingunit_zpsbddeca05.jpg.html]
here is the fuel pump/float unit for the fuel gauge
[url=http://smg.photobucket.com/user/theferret111/media/sendingunit1_zps5341a6ba.jpg.html]
Here is the sending unit. There is a contact that rotates over the 6 strips on a plate, and as the fuel level rises or falls the arm floats lower or higher in the tank and the angle of the arm makes the contact points different for the fuel gauge to read.
[url=http://smg.photobucket.com/user/theferret111/media/sendingunit2_zps4a6e8c21.jpg.html]
(09-28-2015, 03:06 PM)JustPassinThru_imp Wrote: I've noticed that the gague mechanism is a bit erratic.
For example, it will, in the morning on a cold startup, show one segment more fuel than it did when I parked it. Actually, thats almost always true after a shutdown. Must be the angle of the side-stand.
When it gets to the flashing segment, it will bounce back and forth. Again, actually, that's pretty common over the range...it'll be full, then drop one segment, than it comes back up, back and forth until it stabilizes one down.
When it's at the last segment, if it comes up a bit it turns off the flasher feature and will revert to odometer. It will do that several times, before deciding it really is coming up on empty.
I'm guessing it's the gas splasing around on the electronic sensors that take the place of a tank float.
Which is another good reason for using Trip B for tank mileage. In the morning when I start the bike on the side stand, while it is warming up I look at the gauge and the gauge may be showing 3 bars or 1/2 tank of fuel (since there are 6 bars right)? Cycling to Trip B shows me there are actually lets say 135 miles on that tank which is about 15 miles before going to 1 bar and 35 miles to going on flashing reserve, so there is no way there is really 1/2 a tank in there as indicated, and I will need to stop for gas before heading away from the service stations. Of course once you straighten up and ride it soon drops to the proper number of bars.