Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Jetting Issues with 43f XT600 Jetting Issues with 43f XT600
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 Alessio Corradini, on the Salar de Uyuni, Bolivia, of two locals

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


Photo by Alessio Corradini,
on the Salar de Uyuni, Bolivia,
of two locals



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12 Sep 2019
Registered Users
New on the HUBB
  
Join Date: Sep 2019
Posts: 5
Question Jetting Issues with 43f XT600
Quick description of issue: I have a supertrapp exhuast and air pod filters. I have fully cleaned the carb and rebuilt it.

I get a studder in throttle response around 4500rpm. I adjusted the fuel mixture screw to around 3 turns out and it runs better than if its the stock 2 turns out.

The weird part is im getting carbon builup on my exhaust. Running rich? But in order for it to run good it needs to be rich on the mixture screw... Any solutions. No hard starting or backfiring, idles great. Spark plug suggests possible slightly lean.
Reply With Quote
  #2  
Old 12 Sep 2019
Registered Users
Veteran HUBBer
  
Join Date: Feb 2012
Location: Milan, Italy
Posts: 607
typical woes of deleting the airbox..... no easy solution. Supertrapps are also an odd system, they work by choking with the end plates, not first time i hear about issues with them
was the bike running right with these mods before? Or it all started after?
Reply With Quote
  #3  
Old 12 Sep 2019
Registered Users
New on the HUBB
  
Join Date: Sep 2019
Posts: 5
It had been running the same since I have gotten it. The supertrapp and air pods were already in place and I would like to keep them. I guess my best solution would be try different jet sizes and see what works best for the airflow. Also I believe the black smoke on the exhaust could also be oil burning off the top end and have nothing to do with the jetting. Im going to investigate further tomorrow.
Reply With Quote
  #4  
Old 12 Sep 2019
Registered Users
Veteran HUBBer
  
Join Date: Feb 2012
Location: Milan, Italy
Posts: 607
you check jetting by reading the plug, put a fresh one, do some good undisturbed miles at WOT if possible. pull it out and that will tell you you are rich or lean on the main jet. once the main is sorted, mid throttle is more needle dependent. dont touch the needles until you have the right main.

problem with XT is that the CV side of the twin carbs doesnt like running without airbox. the slide carb side is easier to sort out.
Reply With Quote
  #5  
Old 13 Sep 2019
Registered Users
New on the HUBB
  
Join Date: Sep 2019
Posts: 5
Awesome thanks man! I actually just took it for a spin after adjusting the mixture screw out 3 turns. It works beautifully now. Seems I just didn't have it right for the pods.
Reply With Quote
  #6  
Old 13 Sep 2019
Registered Users
New on the HUBB
  
Join Date: Sep 2019
Posts: 5
Im going to rebuild the top end this winter as one of the lower gaskets is leaking some oil. Any suggestions for that job that I should know about?
Reply With Quote
  #7  
Old 13 Sep 2019
N67's Avatar
N67 N67 is online now
Registered Users
Veteran HUBBer
  
Join Date: Oct 2016
Location: Dusheti, Georgia
Posts: 196
Quote:
Originally Posted by Cheapxt View Post
Im going to rebuild the top end this winter as one of the lower gaskets is leaking some oil. Any suggestions for that job that I should know about?
just general things you normally need -
Service manual;
Proper tools including torque wrench, possibly couple special tools;
New parts (gaskets, seals etc, preferably a kit), oem or good quality ones (e.g. athena);
Readiness for doing rebuild further than planned (parts/time/money) according to condition you'll find there;
Good luck!

P.S.
Quote:
the black smoke on the exhaust could also be oil burning off the top end
can't agree as far as I know burnt oil gives more bluish color to the smoke, rather than black.
Reply With Quote
  #8  
Old 14 Sep 2019
Bobmech's Avatar
Registered Users
Veteran HUBBer
  
Join Date: Sep 2008
Location: BOP , New Zealand
Posts: 185
Yes, black smoke is rich mixture, blue smoke is burning oil.
__________________
Remember that Assumption is the mother of all f**k-ups.
Reply With Quote
  #9  
Old 14 Sep 2019
Registered Users
New on the HUBB
  
Join Date: Sep 2019
Posts: 5
Thank you so much guys! Its my first dual sport although I have wrenched on old sportbikes and dirtbikes. Just not exactly the same as big thumper haha
Reply With Quote
  #10  
Old 17 Sep 2019
Registered Users
Veteran HUBBer
  
Join Date: Dec 2008
Location: Denmark
Posts: 1,417
Af 4500rpms youre still mostly using the needles. Try to raise the main needle a notch, perhaps both of them.
Reply With Quote
Reply

Tags
carb, xt600

« 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
1985 XT600 Idling Issues, Please Help? riderboy1961 Yamaha Tech 9 21 Oct 2018 20:14
XT600 Carb Secondary Issues Bull Gear Yamaha Tech 6 7 Sep 2016 20:47
1998 Yamaha xt600 3tb stuttering issues Marcelo_xt600 Yamaha Tech 2 31 Dec 2015 21:21
XT600 running issues ajax Yamaha Tech 17 21 Nov 2013 06:12

 
 

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

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. 11-15
  • 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 08:01.

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