Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by James Duncan, Universe Camp, Uyuni Salt Flats

I haven't been everywhere...
but it's on my list!


Photo by James Duncan,
"Universe Camp"
Uyuni Salt Flats



Like Tree5Likes

Reply
 
LinkBack Thread Tools Display Modes
  #16  
Old 15 Jul 2022
Registered Users
Veteran HUBBer
 
Join Date: Apr 2005
Location: Oxford UK
Posts: 2,105
Quote:
Originally Posted by BMurr View Post
My 1VK has a little white line painted on throttle which will line up with another white line just before second carb operates. Previous owner did quite a lot of touring so presumably did this to get max MPG. Bike sounds different too when that second carb opens up. So the modification is two simple lines of white paint.
My old XR600 Honda was an early model with twin carbs like that, and while I didn’t paint on any white lines - I could feel the transition from the first to the second carbs - it did the same thing. Run up to the point before the second carb opened and it did amazing mpg (for a 600). I could regularly get 80 to 90mpg. Ok, you were only doing 45mph but if fuel was tight or you were happy to trundle along it paid off.
Reply With Quote
  #17  
Old 1 Aug 2022
Registered Users
New on the HUBB
 
Join Date: Aug 2022
Posts: 1
Carburetor syncro

The xt600 attached manual instructs that the second carburetor should start opening when the first is 7mm open. So one needs to delay this more to increase the fuel efficiency. But power will be lost as the second carburetor cannot open fully anymore.
Attached Thumbnails
80mpg?-screenshot-2022-08-01-19.25.19.jpg  

Reply With Quote
  #18  
Old 10 Dec 2022
Chris Scott's Avatar
Super Moderator
Veteran HUBBer
 
Join Date: Jun 2000
Posts: 4,825
I remember that 80mpg day in Mali. Exceptional, I admit, but marking the 2nd throttle helped.
Started with the first of many thorn punctures collected along the track to Gao, then turned into a miserable day slumped over the tank at 50 with frequent stops as my guts were doing a lot less than 80mpg.

20 years later, one night I got 87mpg from an injected 660Z chugging over the Atlas and averaged 20% more than my 1.5 carb Teneres.

In the 70s i had a 140V Bonneville and a mate had a TR7V - same motor but one carb feeding both cylinders. Surprisingly, I seem to recall our mpg was near identical.

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


 
 

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 14:58.