Have any of you added an Aux Tank to a 2020+ RT?

[Leroy73]

Please don’t lecture me on the need to stop. Please don’t ask WHY. No lectures of any kind. I have heard them all. If you are an LD rider you understand.

I like to fuel when I want to, not when I have to. Sort of like a gun fight, reload when you want to, not when you have too.

Please no theories. Only experiences.

There are many parts of North America fuel is not a 'for sure' thing.

Have any of you added an Aux fuel tank (not an emergency container)?
If so, I’m interested in the plumbing. If I bypass the evap, does that throw a code.

Before CANBUS, we just plugged into the vent, no evap codes. My aux tanks are vented, but the vent line can be routed anywhere.

 

[Peter Aawen]

Maybe not specifically about 2020+ RT's, but there's already a bunch of threads here on this very subject you should look at, a couple of good ideas too! Simply type 'Aux Tank' into the Search field up to the top right a bit; tick the 'Search Titles Only' box in the drop-down list that'll appear; submit your search; and do some reading! The thread titles will help you chose what to read, which is just one of the reasons why it's ALWAYS important to briefly ask your question in your thread titles! :thumbup:

 

[Bfromla]

Got majority of parts, but yet to install - https://www.spyderlovers.com/forums/showthread.php?102841-Tourtank

Idea was to gravity feed into tank, through sending unit; unfortunately tank still has to be removed for clear access to that & I’d rather ride. Older 998 & so it's a lil different set up. Good luck to you.

I also believe Tour Tank has changed names -if not just all out closed their doors... google 'spun aluminum tanks' for options.
https://spunaluminumgastanks.com/product-category/motorcycle-tour-tanks/

 

[Cobranut]

Please don’t lecture me on the need to stop. Please don’t ask WHY. No lectures of any kind. I have heard them all. If you are an LD rider you understand.

I like to fuel when I want to, not when I have to. Sort of like a gun fight, reload when you want to, not when you have too.

Please no theories. Only experiences.

There are many parts of North America fuel is not a 'for sure' thing.

Have any of you added an Aux fuel tank (not an emergency container)?
If so, I’m interested in the plumbing. If I bypass the evap, does that throw a code.

Before CANBUS, we just plugged into the vent, no evap codes. My aux tanks are vented, but the vent line can be routed anywhere.

One way that could work is to tee the aux tank into the vent for the main tank, and make sure the gas cap on the aux tank seals completely, without venting.
You'd need a selector valve and switch, and an additional pump and regulator in the aux tank, preferably one identical to the main pump.
That would allow the EVAP system to pressurize and test the entire system as one.
As long as the system doesn't detect the extra volume, it may work properly.
Alternatively, add a second selector valve to the vent line and have the system test whichever tank you're using at the time.

Possibly a better way could be to keep the aux system separate from the main fuel system, with a separate vent.
You could then add an additional inlet and transfer pump to refill the main tank as needed. I'd suggest a level switch to shut off transfer when the tank is nearly full, so you can't forget and flood the EVAP system with liquid fuel.

Good luck, and above all, keep safety first.

 

[Leroy73]

Thank you.
I did some searches but nothing came up on 2020+ and nothing will codes being thrown.

Plumbing through vent/evap is the way I planned. Then the aux tank vent would be the vent. If by passing the evap and aux being the vent for the system. I know to be sure aux tank is empty before opening the main. Fill main first, close, fill aux.

If I cannot bypass evap without throwing a code I thought I could route the aux vent to the evap. Then connect the fuel line from aux to original line to evap/vent line.

I have 3 tank sizes 1.8 gal, 3 gal, and 5 gal from Coyote/Sand Storm/BAM Spun Aluminum that I have used on other motorcycles but no evap on them. The 3 gal is what I plan to use this time.

If I could by pass or delete the evap without codes I’d be fine. I found evap delete on 998.

Once again thank you for input.

 

[Bfromla]

Thank you.
I did some searches but nothing came up on 2020+ and nothing will codes being thrown.

Plumbing through vent/evap is the way I planned. Then the aux tank vent would be the vent. If by passing the evap and aux being the vent for the system. I know to be sure aux tank is empty before opening the main. Fill main first, close, fill aux.

If I cannot bypass evap without throwing a code I thought I could route the aux vent to the evap. Then connect the fuel line from aux to original line to evap/vent line.

I have 3 tank sizes 1.8 gal, 3 gal, and 5 gal from Coyote/Sand Storm/BAM Spun Aluminum that I have used on other motorcycles but no evap on them. The 3 gal is what I plan to use this time.

If I could by pass or delete the evap without codes I’d be fine. I found evap delete on 998.

Once again thank you for input.

Don’t understand how or why just a bung fitting into the main tank & leaving the evap & all the rest of it alone won’t work? An AUX tank would just feed the main tank & the OEM plumbing intact, evap & all, right? :dontknow: The person I got our tank from, actually just had the plumbing run through a hole in the gas cap (I was not willing to do that on mine!)

 

[Albec]

Please don’t lecture me on the need to stop. Please don’t ask WHY. No lectures of any kind. I have heard them all. If you are an LD rider you understand.

I like to fuel when I want to, not when I have to. Sort of like a gun fight, reload when you want to, not when you have too.

Please no theories. Only experiences.

There are many parts of North America fuel is not a 'for sure' thing.

Have any of you added an Aux fuel tank (not an emergency container)?
If so, I’m interested in the plumbing. If I bypass the evap, does that throw a code.

Before CANBUS, we just plugged into the vent, no evap codes. My aux tanks are vented, but the vent line can be routed anywhere.

I understand the need for more range, thus an aux tank.

What I don't get is this statement.

"I like to fuel when I want to, not when I have to. Sort of like a gun fight, reload when you want to, not when you have too."

Although I've never been in a gun fight, thank God, I'm pretty sure that you don't get to reload 'when you want to'. If you did that, it's doubtful that you're going to get through that fight in the way that you'd prefer.

 

[Snowbelt Spyder]

Leroy. Mr. Orange. Post #14. Just a fuel cell and a transfer pump. No impact on emissions or codes. Keep it simple.

https://triketalk.com/threads/aux-fuel-tank.12026/

 

[Leroy73]

I really appreciate all the No BS input. Not like I got on my first install on a carbureted motorcycle.
Thank you.

All are good ideas that I am familiar with.

I do not want to install a bung to the tank, asking for another weak spot. I do not want to have to use a pump if I can avoid it. Many LD riders use a tail dragger, tank on a type of trailer hitch with a pump. But many FI motorcycles before CANBUS did gravity feed via the vent line. Main tank sucked fuel from aux tank and aux tank vent became the vent for the system.

I guess my main question is if I disconnect the evap, do I get a code? If it does, I’ll try attaching the aux vent to evap. On my Triumph I had an electronic by-pass to make the computer think all was connected.

I heard there is a company that makes a custom fit aux tank for the newer BMW GS with CANBUS. I’ll research that. And adapt their connection to the Spyder.

The idea of "reload when you want to, not when you have to" means 'don’t wait until the enemy is on the offense, then find out that your weapon is empty.' Be proactive. It is just an old saying I’ve adopted for refueling.

Thanks again for the meaningful info.

 

[BertRemington]

I'm baffled by the continued references to CANBUS. Neither the FP (integral resistive fuel level sensor) nor EVAP (solenoid purge valve with external flyback diode) devices have a CANBUS connection. Are we making stuff up here?

 

[Peter Aawen]

I'm baffled by the continued references to CANBUS. Neither the FP (integral resistive fuel level sensor) nor EVAP (solenoid purge valve with external flyback diode) devices have a CANBUS connection. Are we making stuff up here?

I doubt there's too much of that here; more likely it's simply a general lack of in-depth understanding about what it is & how CANBUS works; and what it involves/is involved with, especially on our Spyders. But that is just my opinion... YOMV :thumbup:

 

[BertRemington]

I guess my main question is if I disconnect the evap do I get a code.

From my service manual:

P0443 ECM Canister purge valve open circuit
P0458 ECM Canister purge valve shorted to ground
P0459 ECM Canister purge valve shorted to battery +

 

[BertRemington]

From my service manual:

Evaporative Emission System (EVAP)

As the vehicle is sitting and not running, fuel evaporates within the fuel tank.

The fuel tank vent is connected to an EVAP canister (charcoal) that is used to trap any hydrocarbon emissions from the evaporated fuel preventing them from escaping to the atmosphere. The fuel vapors are absorbed by a charcoal medium inside the canister.

An EVAP purge valve is used in conjunction with the EVAP canister. A hose connects the solenoid operated valve to a vacuum port on the intake manifold.

Once the engine is running and reaches predetermined conditions, the ECM controls the purge solenoid valve according to engine RPM and load. Thus, vacuum from the engine draws (or purges) the hydrocarbon emissions from the canister and burns them during the combustion process. The ECM cycles the solenoid ON and OFF as necessary.

In order for engine vacuum to draw in the hydrocarbon emissions from the canister, a flow must be created. As the hydrocarbon emissions are drawn out of the canister, they are replaced with fresh air by means of the canister pre-filter. Thus ensuring proper fuel system venting.

The vent valve ensures that, if the vehicle is ever upside-down, liquid fuel cannot flow through the vent line.

A service manual is available in PDF form at modest cost for every year of the 1330cc Spyder. The manuals are informative and written by native speakers of English.

 

[Leroy73]

Thank you Bert for the codes and the follow up.

I think I have my question answered and can move forward with my project.

 

[PistonBlown]

I've not got around to refitting this on my F3, but this is what I had on my RS:





On the RS I'd previously eliminated the evap canister and so plumbed this into the point where that normally attached at the top of the tank. This meant the main tank vented through the aux tank which worked just fine. As the fuel cap on the main tank isn't vented it basically turned my main tank into a huge reserve. I'd keep riding with it gravity feeding from the aux tank (it was high enough on the rack to not need a pump) and I'd know when that was empty when my fuel gauge would finally start moving.

I've not tried fitting it to the F3 yet because the design of the tank is quite different, also the tank is higher, and from what I could work out from the manual, removing the evap canister may be more of an issue on the F3. My plan, not implemented yet, was to get an inlet added to the pipe that goes up to the filler cap (as it's simpler than getting one added to the tank) and then plumb the aux in there. I was going to add a fuel pump this time, with a switch so I can pump from the aux to the main once the main was low. A lot more work than the approach I used for the RS, which is why I've not done it yet. For now, I just carry around a fuel bladder until I get around to sorting it.

As you can probably guess, like you, I'm a Long-Distance rider and I hate stopping.

 

[CrazyCooter]

I've been collecting parts for the wife's RTL for the 3gal aux tank install, but I ran into a bit of a snag we had not thought through which became apparent on our last trip.

I had initially planned to just mount the vertical tank to the left passenger footboard mount, since she never carries a passenger. Well, this last trip we found it nice to leave my bike at the motel when we check in early and just use her bike to tour the area and do dinner!? Now we don't want to give up passenger possibilities!

I too had planned to just vacuum through the vent and either disconnect the cannister or add another bung to the aux tank to vent it back to the cannister, as I haven't seen a powersports vehicle with a tank pressure sensor to date - maybe these things do?

Now I'm wondering about a 6"x24", 2.625-gal tank, mounted low opposite the muffler, and mounted in a similar fashion.

We too travel some distance at times and into some pretty remote areas. It would be nice to have the capacity to nearly equal my bike's range, and to be able to ditch the gas can that takes up storage space in the frunk!

Back to the drawing board!