Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > BMW Tech
BMW Tech BMW Tech Forum - For Questions specific and of interest to BMW riders only.
Photo by Daniel Rintz, Himba children, Namibia

The only impossible journey
is the one
you never begin

Photo by Daniel Rintz,
Himba children, Namibia



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 30 Jun 2012
Gold Member
Veteran HUBBer
 
Join Date: Dec 2007
Location: Bucks, UK
Posts: 642
Fuel escaping at altitude

I'm having problems with fuel blowing back through the breather tube when I get above 8000 ft.
The bike is a G650 X Challenge with a Touratech 17 litre Safari tank (plumbed in as per Touratech instuctions, i.e. with 2 hoses coming from the OE tank to the TT tank) the fuel seems to be syphoning back from the OE tank into the TT tank and then blowing out of the TT tank breather, all over me and a nice hot engine
Any ideas for a fix please chaps as I'm in Bolivia and for the next 3 weeks I'm going to be above said altitude.

Cheers
Pete
__________________
Vietnam, Cambodia & Thailand 2016
Buenos Aires to NYC 2012-2013: www.facebook.com/curryhunt
India and back 2009-2010:
Reply With Quote
  #2  
Old 2 Jul 2012
Registered Users
Veteran HUBBer
 
Join Date: Sep 2003
Location: Estonia
Posts: 787
It's out of equilibrium with the ambient pressure when it pisses fuel out of breather hose. I'm guessing something is wrong with the breather pipe's end that goes inside the tank (it's maybe loose and gets too deep inside the fuel - breather hose should be on top of the tank where no fuel gets) or is it the TT tank that is messing pressure up through the pump system you have for auxiliary tank? It shouldn't be coming out of breather if the tank is in the equilibrium with the surrounding environment's pressure (that's why there's the breather hose by design - there should be no vacuum nor overpressure). I'd look for the details that may create overpressure - i.e. a clogged breather hose on one of the tanks?

Not sure how this TT tank system works tho. Maybe one of the tanks has no breather so the fuel can be pushed (with intentional overpressure) from one to another tank(?) This can be your source of problems.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
Thread Tools
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel costing 3X more in Bolivia for foreign registered plates 2foilheads SOUTH AMERICA 44 9 Dec 2017 05:19
Fuel escaping at altitude mcgiggle Tech 1 25 Jul 2012 08:14
Taking extra fuel with you duive01 Travellers' questions that don't fit anywhere else 26 24 Jul 2012 15:27
F800GS .. bad fuel warning .. don't let one tank of bad fuel end your trip _CY_ BMW Tech 4 4 Feb 2012 23:15
increasing fuel capacity Robertsmits Tech 9 19 Dec 2011 12:42

 
 

Announcements

Thinking about traveling? Not sure about the whole thing? Watch the HU Achievable Dream Video Trailers and then get ALL the information you need to get inspired and learn how to travel anywhere in the world!

Have YOU ever wondered who has ridden around the world? We did too - and now here's the list of Circumnavigators!
Check it out now
, and add your information if we didn't find you.

Next HU Eventscalendar

HU Event and other updates on the HUBB Forum "Traveller's Advisories" thread.
ALL Dates subject to change.

2024:

Add yourself to the Updates List for each event!

Questions about an event? Ask here

HUBBUK: info

See all event details

 
World's most listened to Adventure Motorbike Show!
Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

"Ultimate global guide for red-blooded bikers planning overseas exploration. Covers choice & preparation of best bike, shipping overseas, baggage design, riding techniques, travel health, visas, documentation, safety and useful addresses." Recommended. (Grant)



Ripcord Rescue Travel Insurance.

Ripcord Rescue Travel Insurance™ combines into a single integrated program the best evacuation and rescue with the premier travel insurance coverages designed for adventurers.

Led by special operations veterans, Stanford Medicine affiliated physicians, paramedics and other travel experts, Ripcord is perfect for adventure seekers, climbers, skiers, sports enthusiasts, hunters, international travelers, humanitarian efforts, expeditions and more.

Ripcord travel protection is now available for ALL nationalities, and travel is covered on motorcycles of all sizes!


 

What others say about HU...

"This site is the BIBLE for international bike travelers." Greg, Australia

"Thank you! The web site, The travels, The insight, The inspiration, Everything, just thanks." Colin, UK

"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia

"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA

"Your website is a mecca of valuable information and the (video) series is informative, entertaining, and inspiring!" Jennifer, Canada

"Your worldwide organisation and events are the Go To places to for all serious touring and aspiring touring bikers." Trevor, South Africa

"This is the answer to all my questions." Haydn, Australia

"Keep going the excellent work you are doing for Horizons Unlimited - I love it!" Thomas, Germany

Lots more comments here!



Five books by Graham Field!

Diaries of a compulsive traveller
by Graham Field
Book, eBook, Audiobook

"A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.



Back Road Map Books and Backroad GPS Maps for all of Canada - a must have!

New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80G/S.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events all over the world with the help of volunteers; we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, or ask questions on the HUBB. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.




All times are GMT +1. The time now is 09:27.