Aux Tank Installation - Page 4 - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #31 of 45 (permalink) Old 03-21-2019, 02:50 PM
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I have a Maple Farkles tank on my Ď16. Advertised capacity is 4.8g. I would open the valve at2 bars and leave it open for about 45 mins or so. When I went to fill it up, I could never get more than 4.2g in it. I just assumed it was smaller than advertised. In reality I was not leaving the aux tank valve open long enough to let the main tank get lower. If I run the main tank down to single bar flashing, all the fuel would transfer and it would take 4.8g in fill up. FYI- I have 1/4Ē line and it works fine.
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post #32 of 45 (permalink) Old 03-21-2019, 04:36 PM Thread Starter
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Quote:
Originally Posted by Kendoo View Post
I have a Maple Farkles tank on my Ď16. Advertised capacity is 4.8g. I would open the valve at2 bars and leave it open for about 45 mins or so.
Kendoo, how is your vent line run? Iím debating at vent valve or something to block the fuel from spilling out, but still letting air in. I found I may of left a trail on some curvy roads..... When the tank was angled In the direction of the line, gravity would take over and the fuel would spill out. Curious what others are doing as Iím sure itís happened not just to me. Maple Farkles does sell a fuel catch can, which could work too. Thanks

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2002 Honda vt1100c2 Shadow Sabre
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post #33 of 45 (permalink) Old 03-21-2019, 10:12 PM
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Originally Posted by sector7g View Post
Kendoo, how is your vent line run? Iím debating at vent valve or something to block the fuel from spilling out, but still letting air in. I found I may of left a trail on some curvy roads..... When the tank was angled In the direction of the line, gravity would take over and the fuel would spill out. Curious what others are doing as Iím sure itís happened not just to me. Maple Farkles does sell a fuel catch can, which could work too. Thanks


Yeah, I have the catch can on mine. Vent goes from filler neck to catch can, then from catch can down behind the license plate. Iíve never spilled any fuel that I know of. Even when parked on a hot day with both tanks full. I can only assume the catch can works?
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post #34 of 45 (permalink) Old 03-21-2019, 11:19 PM
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Sorry two_wheeled. I didn't see the request for a pic of my aux tank. The only thing I have is a pic while traveling that shows a little of the tank. I recently sold the bike so I can't get a better pic of the tank on the bike.
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post #35 of 45 (permalink) Old 03-22-2019, 07:42 AM
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Is it feasible for you guys to use a dirt bike gas cap vent (one way valve for air to go in), or do you need a pressure release?
https://www.ebay.com/itm/Aluminum-Ga...frcectupt=true

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post #36 of 45 (permalink) Old 03-22-2019, 09:10 AM
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Originally Posted by RaYzerman View Post
Is it feasible for you guys to use a dirt bike gas cap vent (one way valve for air to go in), or do you need a pressure release?
https://www.ebay.com/itm/Aluminum-Ga...frcectupt=true

I have been wondering the same thing.... might be able to use 2 in parallel , one on each direction .. maybe mod the preasure release one to only have a tiny passage.

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post #37 of 45 (permalink) Old 03-22-2019, 11:25 AM Thread Starter
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I've actually been looking in to those as well. A fuel vent check valve / tipover valve. The theory is a valve that allows air in but doesn't let fuel out.
This may possibly also be accomplished by utilizing a longer vent line that rises above the tank and (at least, in my little theoretical world) could cross / run back the length of the tank) and then down to the outpoint. By running the line back to the opposite end of the filler neck at a slightly elevated angle, the fuel would not climb high enough to spill and would simply run back in to the tank once the bike is righted. I have not tested this, but I slept at a Holiday Inn last night. I'll probably try this first as vent line is a few dollars. (Insert "Hold my beer while I try this") .
~Another benefit to this would be dirt/debris would have a much harder time getting in....

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post #38 of 45 (permalink) Old 03-22-2019, 09:14 PM
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Quote:
Originally Posted by RaYzerman View Post
Is it feasible for you guys to use a dirt bike gas cap vent (one way valve for air to go in), or do you need a pressure release?
https://www.ebay.com/itm/Aluminum-Ga...frcectupt=true


My tank was built to be IBR compliant...meaning it has to have a non-vented cap. If one has no IBR aspirations, a vented cap would be fine.
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post #39 of 45 (permalink) Old 03-23-2019, 06:41 AM Thread Starter
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As promised, photos of the install. Iíll be adding a gym bag to hold/cover the tank, add a few pockets, and insert padding to create a backrest. I added a K&N inline fuel filter, ran the line down the right side of the bike with a quick connect on the side of the tank. Iím not sold on the current fuel valve - might also remove the petcock. Iíd prefer a larger handle on the valve. With winter gloves on, the current handle is somewhat difficult to locate at speed. Still a work in progress. Gaston Motorcycle Werks did the bulkhead install - great group of guys and their restoration of older bikes is incredible.
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tim

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1980 Kawasaki kz440
2002 Honda vt1100c2 Shadow Sabre
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post #40 of 45 (permalink) Old 03-23-2019, 10:04 AM
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Clean install
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