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FJR Motorcycle Forums
Technical & Mechanical Problems
2018 FJR AUX Tank Plumbing
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<blockquote data-quote="Fred W" data-source="post: 1426410" data-attributes="member: 3828"><p>Very cool idea. Even better that it seems to work well.</p><p> </p><p></p><p>It was briefly mentioned earlier in this thread as the “tip over blocker”, but were you aware that there is a check valve in line with the vent line located inside the Gas cap? Inside the cap assembly there are two parallel vent paths. One has a small metal ball fit into it that is a gravity operated check valve. The other path has some sort of restrictive filter media. </p><p> </p><p></p><p>Normally the check valve is open to vacuum, but when you drop the bike it’s supposed to reduce the gas spillage out the vent pipe. Some of us removed those balls to prevent excess tank pressurization from fuel boiling. I was just thinking that the ball may restrict your liquid fuel transfer somewhat and you may want to get rid of it for better flow at low vacuum. It certainly isn’t doing anything for you when you have your aux tank connected.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1426410, member: 3828"] Very cool idea. Even better that it seems to work well. It was briefly mentioned earlier in this thread as the “tip over blocker”, but were you aware that there is a check valve in line with the vent line located inside the Gas cap? Inside the cap assembly there are two parallel vent paths. One has a small metal ball fit into it that is a gravity operated check valve. The other path has some sort of restrictive filter media. Normally the check valve is open to vacuum, but when you drop the bike it’s supposed to reduce the gas spillage out the vent pipe. Some of us removed those balls to prevent excess tank pressurization from fuel boiling. I was just thinking that the ball may restrict your liquid fuel transfer somewhat and you may want to get rid of it for better flow at low vacuum. It certainly isn’t doing anything for you when you have your aux tank connected. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
2018 FJR AUX Tank Plumbing
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