Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Surging Surging
Register FAQ Calendar Today's Posts
Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Hendi Kaf, in Cambodia

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


Photo by Hendi Kaf,
in Cambodia



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 14 May 2008
Contributing Member
HUBB regular
  
Join Date: Mar 2006
Location: ireland
Posts: 69
Surging
My '91 Tenere has started to idle irregularly. One minute it's ticking over fine, blip the throttle and it cuts out. Start again, idles fine then it might do the same or it might tick over at 3000rpm, also happens when riding. Either it won't cut back or there's a slight lag when you open the throttle. It's not the cables. I've cleaned both carbs.Inlet rubbers are fine, I tested them with easy start. Any new ideas or similar experience?
Reply With Quote
  #2  
Old 15 May 2008
Registered Users
Veteran HUBBer
  
Join Date: Jan 2001
Location: Stockholm
Posts: 651
Options
1. Remember, the last part of the travel close to idle has only a very little spring force available - a cable sticking a littlebit might just be the problem
2. Is the lever of the primary slide well fixed to the shaft - no play? Check by removing cover of primary carb
3. Fuel arriving in the float bowl as it should - check per procedure in earlier post(s)
4. Slide of 2nd carb moving really free? Should return in closed position smoothly when you push it up
5. Throttle valve of second carb not sticking in open position?
6. Idle speed setting (bog screw) correct? Idle speed set not by cable but by screw!
*. Ignition OK? Another chapter ....

Good luck!
Auke
__________________
Auke
http://aukemarieke.blogspot.com
Reply With Quote
  #3  
Old 22 May 2008
Registered Users
Veteran HUBBer
  
Join Date: Apr 2003
Location: Manchester UK
Posts: 235
Quote:
Originally Posted by cathal View Post
My '91 Tenere has started to idle irregularly. One minute it's ticking over fine, blip the throttle and it cuts out. Start again, idles fine then it might do the same or it might tick over at 3000rpm, also happens when riding. Either it won't cut back or there's a slight lag when you open the throttle. It's not the cables. I've cleaned both carbs.Inlet rubbers are fine, I tested them with easy start. Any new ideas or similar experience?
If you blip the throttle and it cuts out you are too lean

this is where it gets tricky though... Make sure your primary carb slide is the prescribed height (or you will be trying to balance two sets of variables) when reaching the throttle stop (or as Auke says..Bog Screw). Then adjust your idle jet. Lean the motor out until you get optimum revs then start backing off (richenning)

tell tale signs if you dont have diagnotic tools and doing it by ear.
Burbles with hesitation on blipping the throttle - too rich
starves and dies on blipping the throttle - too lean
when riding when you back off the throttle after hard on and the motor starts popping - too lean
When you come off the throttle and the revs stay high for a while and then gradually drop - too lean
When you come off the throttle and the revs drop low and then pick up - too rich
A long idle that dies slowly - too lean
A idle that is difficult to cut (dead stop) wayyyyyyy too lean

PS. These bikes like to run rich. Dont be afraid to richen the mixture as far as it will go before it starts degrading performance.
Reply With Quote
Reply

« Previous Thread | Next Thread »

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

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
Surging peter04 BMW Tech 13 21 Oct 2006 15:46
Surging R80GS gsworkshop BMW Tech 5 13 Sep 2005 03:07
What is Surging? XR Max 600 BMW Tech 2 20 Jan 2004 12:46

 
 

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

25 years of HU Events
Be sure to join us for this huge milestone!

ALL Dates subject to change.

2025 Confirmed Events:

Virginia: April 24-27 2025
Queensland is back! May 2-4 2025
Germany Summer: May 29-June 1 2025
CanWest: July 10-13 2025
Switzerland: Date TBC
Ecuador: Date TBC
Romania: Date TBC
Austria: Sept. 11-14
California: September 18-21
France: September 19-21 2025
Germany Autumn: Oct 30-Nov 2 2025

Add yourself to the Updates List for each event!

Questions about an event? Ask here

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...

Adventurous Bikers – We've got all your Hygiene & Protection needs SORTED! Powdered Hair & Body Wash, Moisturising Cream Insect Repellent, and Moisturising Cream Sunscreen SPF50. ESSENTIAL | CONVENIENT | FUNCTIONAL.

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!

Your ad could be here, on EVERY page of the HUBB, or the whole website, or as many as you like!

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 03:46.

Contact Us - Horizons Unlimited Motorcycle Travellers Website - Archive - Privacy Statement - Top