Fuel overflowing out of top after refill - Road Star Warrior Forum : Yamaha Star Warrior Forums

Reply
 
LinkBack Thread Tools
Old 11-17-2019, 10:07 PM   #1 (permalink)
Junior Member
 
static-x's Avatar
 
Join Date: Dec 2018
Location: Oregon
Posts: 17
Default Fuel overflowing out of top after refill

Alright guys something odd happened today. Snagged one of those cheap quick release fuel caps and installed it today. Went to gas station to top her off. Went on a good spirted ride then went to top her off again. Popped the quick release cap back on put the key into ON and heard it prime then fuel started pouring out. Pushed her to the side and took off the quick release cap and turned the key again. Again fuel rose and started dumping out the top. All I could do is keep it on and let it finish dumping out what it needed to before I was able to ride it again. Could this be because these new chinese knockoff quick releases don't have a venting port??

https://www.ebay.com/itm/Gas-Fuel-Ta...cf5c%7Ciid%3A1
static-x is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-18-2019, 12:43 AM   #2 (permalink)
Super Moderator
 
arizonawarrior's Avatar
 
Join Date: Jan 2005
Location: Reno Nevada and Rogue River Oregon
Posts: 27,427
Blog Entries: 4
Default

The stock RSWarrior has a left-side dry break in the line from under the left front of the top fuel tank to the under-seat tank where the fuel pump lives. There is also an under-seat dry break in the vent line running up underneath the top fuel tank. These work in conjunction with the vent hole in the top tank filler hole. Assuming you did not mix-up the fuel and vent line circuit then it sounds like your new cap blocks venting but I do not recall that outcome being fuel pumping up out of the top tank filler hole. Usually it creates vacuum and inhibited fuel flow starves the motor.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
arizonawarrior is offline   Reply With Quote
Old 11-18-2019, 06:31 PM   #3 (permalink)
Senior Member
 
Gilly's Avatar
 
Join Date: Aug 2007
Location: Perdido Bch. Al.
Posts: 5,572
Default

Seems like your fuel pump is pumping gas back into the tank instead of pushing fuel toward the injectors. If your vent line is plugged, when you take your gas cap off you will hear a suction sound. Seems like your pump might be running backwards.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Gilly is offline   Reply With Quote
 
Old 11-18-2019, 10:51 PM   #4 (permalink)
Senior Member
 
Sandytows's Avatar
 
Join Date: Jul 2015
Location: Maine/Mass/NH
Posts: 781
Default

All I can say is check your dry breaks make sure they're fully seated

Sent from my SAMSUNG-SM-G930A using Tapatalk
__________________
2007 Graphite/Silver, Churchkey Vbak, Samson StreetSweepers w/ Big City Thunder baffles, AIS Delete, Akitadog coil plate, LCV delete, DynaCoils under tank, Ivans ECU Flash, PCV with Ivans Map, Left side cleanup, Right side horn brake cleanup, 3-full plate clutch mod, BArnett Clutch, Pulley change 33/68, Cyclops 3800 headlight
LOTS of Chrome!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Sandytows is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Road Star Warrior Forum : Yamaha Star Warrior Forums > Warrior Forums > Technical Discussion

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 06:11 PM.


Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
RSWarrior.com is an independent Yamaha enthusiast website. Content on RSWarrior.com is generated by its users and RSWarrior.com is not in any way affiliated with Yamaha Motor Corporation, U.S.A.