Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
backfiring backfiring
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 George Guille, It's going to be a long 300km... Bolivian Amazon

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


Photo by George Guille
It's going to be a long 300km...
Bolivian Amazon



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 9 Aug 2003
Registered Users
HUBB regular
  
Join Date: May 2003
Location: sydney australia
Posts: 20
backfiring
bike ivj keeps backfiring after deaccelaration slowly getting worse apart from backfiring running fine could possibly be, ive made alteration to airbox closing original intakes and removing service panel after this alteration is it necessary to change jetting as seems to be sucking more air ,what are other causes of backfiring cheers
Reply With Quote
  #2  
Old 10 Aug 2003
Registered Users
New on the HUBB
  
Join Date: Aug 2003
Location: Portsmouth, England
Posts: 11
Backfiring is normally a sign of a weak mixture. Try blanking off a portion of the opening in the airbox and see if this makes any difference - although unlikely. It is however often caused by a loose exhaust pipe to Head joint or blowing gasket here. Another major cause can be a burnt exhaust valve.
Reply With Quote
  #3  
Old 12 Aug 2003
Steve Pickford's Avatar
Contributing Member
Veteran HUBBer
  
Join Date: Jul 2003
Location: Oxford, UK
Posts: 994
Also try re-setting the mixture screw on the under side of the carb. I'm not familiar with XT's but you'll probably find it on the the cyl.head side of the carb. If so, it will probably be controlling fuel at tickover. Screw it in finger tight & no more and then screw it out approx. 1 to 1.5 turns. Try this on a hot engine. the backfiring should decrease. If not screw it out in eighth of a turn increments. If it still does not cure it by the time you're 3 or 4 full turns out, then it is a leaking exhaust or carb manifold.

If trying this, it is worthwhile taking the screw right out, watch out for the spring (sprung loaded on some bikes) & greasing it prior to screwing it back in finger tight (no more!!). Seized mixture screws are a pian in the arse.
__________________
My photos: www.possu.smugmug.com
Reply With Quote
  #4  
Old 16 Aug 2003
Registered Users
HUBB regular
  
Join Date: May 2003
Location: sydney australia
Posts: 20
cheers for the replys i havent had a play with the bike just yet but i think i know what the problem is the front racks i made for fuel cans dont allow the headers to fit snug so its out with the grinder once more
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

 
 

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!

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 15:24.

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