Fuel tank capacity and float - Page 5

kumatae · 06-29-2016, 12:57 PM

Excellent tutorial! Hope CSC takes a note and does their future tutorials like this!

madsocial · 06-30-2016, 09:59 AM

My husband and I did the same adjustment to the floater. This week was the first week that I rode with a full tank since the adjustment, in order to really test how the change even worked.

The outcome: I rode for 134 miles and it still registered a full tank. Then when it hit the 160 mile range it all of a sudden dropped to 3 bars. Then when it got to 180 it dropped to the Empty bar and when I hit 187 it started blinking empty. LOL So I rode for 2 full days with no changes and then on the 3rd day the fuel gauge dramatically made changes.

pete · 07-01-2016, 07:05 AM

Quote:

Originally Posted by peperino

Why.
Do you really think that the fuel pump needs THAT much fuel to work? We are talking half a tank here

he's 100% correct... the pumps needs to be under fuel to keep it cool...

why that much fuel... because some joe avarage's are dick heads
just zongshen playing safe... as do most of the other companys...
the standard XT tank had a 150km left in it when the fuel light & fuel
trip counter came on..

...

fjmartin · 11-21-2016, 11:57 PM

Today I followed the great instructions provided to adjust the float arm on my RX3. I've not liked that my bike will be flashing empty and if I go fill it up it only takes about 2.25 gallons. So today I adjusted it. Now I'll monitor when it goes from full to 3 bars and so on to see how it works. I believe it will start flashing empty at me with about 1 gallon left but won't know until I run it down. Will adjust as needed so I don't ruin the fuel pump. Thanks again for the help!

fjmartin · 11-26-2016, 05:32 PM

I got a change to test my changes and it worked great. Previously once the bike started flashing E I would continue to drive for another 90 miles or so before filling it up and then it would take 2.7 gallons to fill. Now, the bike goes from full to the next bar after about 60 miles and then goes down till it flashes E and when I stopped immediately to fill up it took 2.45 gallons to fill leaving 1.25 remaining since the tank is actually only 3.7 gallons. That's much better for me. Leaves enough fuel to protect the fuel pump but doesn't drive me nuts saying it's empty so quickly. Nice mod and thanks again for such great instructions!

Caribbean Rider · 01-29-2017, 02:10 PM

I am wondering if my tech re-installed the fuel sender correctly, because our bikes have a fuel level problem that is not easily explained.

The basics: which direction does the float go? Forward or backwards?

Thunder · 08-02-2017, 12:39 PM

The float arm goes towards the rear of the bike.

Gaijin · 06-27-2019, 07:30 PM

Just an update on this, something I got from Joe Berk's blog: the tank is 4.2 gallons. If there was nothing else in the tank, it would hold 4.2 gallons. But there's a big ol' fuel pump and float in the tank, and those take up space, so the USABLE capacity is more like 3.7 gallons.

And I will be leaving the float alone, as I ran out twice. Yes it comes on very early, but it's not that big of a deal. If you ride in town, and you keep your habits consistent, you'll know your average MPG and you can fill up based on the odometer. If you are riding long distances and you don't know what MPG you're getting, you might be shocked to find out it could be as low as 44 MPG (that's what I got on a long ride, full throttle, with a headwind). So my new practice is: when the dang light's flashing, fill it up. It beats pushing the bike on the side of a highway.

06-30-2016, 09:59 AM	#62
madsocial Join Date: Feb 2016 Location: Maryland Posts: 213	My husband and I did the same adjustment to the floater. This week was the first week that I rode with a full tank since the adjustment, in order to really test how the change even worked. The outcome: I rode for 134 miles and it still registered a full tank. Then when it hit the 160 mile range it all of a sudden dropped to 3 bars. Then when it got to 180 it dropped to the Empty bar and when I hit 187 it started blinking empty. LOL So I rode for 2 full days with no changes and then on the 3rd day the fuel gauge dramatically made changes. __________________ Cheers! Rania aka madsocial 2016 Zongshen RX3 (CSC Cyclone) Pay it Forward!
	1

11-21-2016, 11:57 PM	#64
fjmartin Join Date: Sep 2016 Location: Redmond, WA. Posts: 534	Today I followed the great instructions provided to adjust the float arm on my RX3. I've not liked that my bike will be flashing empty and if I go fill it up it only takes about 2.25 gallons. So today I adjusted it. Now I'll monitor when it goes from full to 3 bars and so on to see how it works. I believe it will start flashing empty at me with about 1 gallon left but won't know until I run it down. Will adjust as needed so I don't ruin the fuel pump. Thanks again for the help! __________________ 2017 BMW F800GS Adventure
	1

11-26-2016, 05:32 PM	#65
fjmartin Join Date: Sep 2016 Location: Redmond, WA. Posts: 534	I got a change to test my changes and it worked great. Previously once the bike started flashing E I would continue to drive for another 90 miles or so before filling it up and then it would take 2.7 gallons to fill. Now, the bike goes from full to the next bar after about 60 miles and then goes down till it flashes E and when I stopped immediately to fill up it took 2.45 gallons to fill leaving 1.25 remaining since the tank is actually only 3.7 gallons. That's much better for me. Leaves enough fuel to protect the fuel pump but doesn't drive me nuts saying it's empty so quickly. Nice mod and thanks again for such great instructions! __________________ 2017 BMW F800GS Adventure
	3

06-29-2016, 12:57 PM	#61
kumatae Join Date: Oct 2015 Posts: 51	Excellent tutorial! Hope CSC takes a note and does their future tutorials like this!
	0

01-29-2017, 02:10 PM	#66
Caribbean Rider Join Date: Jun 2015 Posts: 19	I am wondering if my tech re-installed the fuel sender correctly, because our bikes have a fuel level problem that is not easily explained. The basics: which direction does the float go? Forward or backwards?
	0

08-02-2017, 12:39 PM	#67
Thunder Join Date: Aug 2016 Posts: 24	The float arm goes towards the rear of the bike.
	1

06-27-2019, 07:30 PM	#68
Gaijin Join Date: Jun 2019 Posts: 85	Just an update on this, something I got from Joe Berk's blog: the tank is 4.2 gallons. If there was nothing else in the tank, it would hold 4.2 gallons. But there's a big ol' fuel pump and float in the tank, and those take up space, so the USABLE capacity is more like 3.7 gallons. And I will be leaving the float alone, as I ran out twice. Yes it comes on very early, but it's not that big of a deal. If you ride in town, and you keep your habits consistent, you'll know your average MPG and you can fill up based on the odometer. If you are riding long distances and you don't know what MPG you're getting, you might be shocked to find out it could be as low as 44 MPG (that's what I got on a long ride, full throttle, with a headwind). So my new practice is: when the dang light's flashing, fill it up. It beats pushing the bike on the side of a highway.
	4