Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
tuning an xtz tuning an xtz
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 18 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Apr 2003
Location: sydney australia
Posts: 174
tuning an xtz
hi people, after riding my bike from london to india ,the old girl is starting to misfire everynow and then and she could really do with a tune up, is it tricky to tune up these twin carby motors or is it a pretty simple procedure, should i just experiment with tips in the "pilot screw" post... its the twin carb thing thats got me a bit confused..

i was thinking of pulling the carb off giving it a thorough clean and putting it back on ( my choke is getting stuck on) im not sure if this is a good idea thanks boys...........phil..

[This message has been edited by futronix (edited 18 May 2005).]
Reply With Quote
  #2  
Old 18 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Sep 2004
Location: Salisbury UK
Posts: 155
First port of call fit a new plug. Cheap and usally does the trick. The plugs take a hammering on a single doing about 4x the work of one on a 4 o2 cylinder bike.

BD
Reply With Quote
  #3  
Old 19 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
Is it a 660?
Then adjust the pilot mixture screw.
And fix the choke plunger. Secret agent WD-40 usually does the job.
Check if the shaft of the shutter of the 2nd carb is worn out in the housing. Just look at it and then open the throttle about 6 mm. and see if the shaft first goes up and then turns. If that's the case you need a new carb or a miracle-job on the carb housing and the shaft. Symptoms would be irregular idle and a lot of explosions in the exhaust with throttle closed.
Don't take the carb off or apart unless you really have to. If you don't know what you're doing it usually doesn't get any better. Cleaning jobs usually only disperse the dirt. Just leave it where it is if it doesn't cause problems.


------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #4  
Old 19 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Apr 2003
Location: sydney australia
Posts: 174
ok, so i did pull the carb off just to work out what was going on but decided against pulling it to pieces just yet,a little bit of dust and grime but not bad considering what its been through.
one question has come from my fooling around...
to tune the pilot screw do i need a screw driver on a 90 drgree bend as the screw is on the underneath of the carb and very difficult to get into...or is there another way???

the choke was easy, wd40 and a rag...no problems.
a new airfilter has done wonders aswell...thanks for the replys, any more tuning tips HIGHLY appreciated.
i put a laser produro race pipe on this bike months ago but did not change any settings, bike still runs great, but do you think i should get someone to tune the old girl to suit the pipe...or can i do this myself????
thanks again....phil.(gotta love the xtz660)
Reply With Quote
  #5  
Old 20 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
I use a small screwdriver from a sewing machine with the plastic cut in half and a piece of rubber hose around the remains of the plastic.
Before you mount the carb, set the opening moment of the 2nd carb's butterfly. Put a 5 mm. drill under the 1st slide and adjust. Also adjust so that the butterfly opens fully horizontal when the 1st slide is open. And adjust so that the 1st slide opens exactly 100%, no less and no more.
Then when you have the idle mixture ok, get the bike on a Dynojet bench [or similar] to check carb settings.
And get rid of the Produro because amongst other symptoms it makes the 2nd carb hunt. It has too little volume for a 660. Try to get a Laser Duo-Tech. My torque went from 43 to 52 Nm.
Do upgrade the air hole in the 2nd slide to 4 mm. It gets you quicker throttle response.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #6  
Old 21 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Apr 2002
Location: bizovac, croatia
Posts: 240
Fred, can you explain more in detail difference between Produro i Duotech? What is bigger advantage using Duotech and why? Why is volume of Produro too small for XTZ 660?

AnteK
__________________
AnteK
Reply With Quote
  #7  
Old 24 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
If you look at the shear size of the thing and compare this with the size of the original one [which Mr. Yamaha has surely studied and found out that it was the best compromise in economy/power/silence etc] you can easily imagine that something is wrong.
On a Dynojet test run it turned out that the second carb was hunting because of the small volume of the end can. And the loss of power and torque when you mount the Produro is evident, especially in the lower revs.
The only advantage of the Produro is that it is so small that you have more space for luggage. If that is what you need.
The biggest advantage of the Duo-Tech is the increase of torque. And the idea to have a real exhaust with nice sound, either loud or silent, depending on which insert you use.
The Produro is either an absorbtion type, which is always too loud, or a reflection type which has no nice sound. The Duo-Tech [as the name says] is a combination of both.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #8  
Old 24 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Apr 2002
Location: bizovac, croatia
Posts: 240
Thx Fred! Can you mail me some photos of Duo-Tech mounted on your bike? My real mail is ante.kardum@os.htnet.hr.

Regards,
AnteK
__________________
AnteK
Reply With Quote
  #9  
Old 27 May 2005
Gold Member
Veteran HUBBer
  
Join Date: Feb 2005
Location: albury nsw australia
Posts: 306
hello fred ,i have an xtz with that massive monster exhaust on it ,are you a mechanic if so can i get one of these exhausts fitted by you in holland ,i am an aussie and heading towards thailand and will be in holland area next week ,wood like some tips if you have any
david
Reply With Quote
  #10  
Old 27 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
David, it's not as simple as it seems because the piece inbetween the manifold and the can has to be made and/or modified. We have bought this piece from a FZR600 which fits on the manifold and on the can, but the curve has to be modified.
Furthermore I have tested the Duo-Tech in Morocco and the problem weas that it separates from the bike. That is, we haven't found the fixation yet that endures jumping the Moroccan stones.
But make sure you do come and see us next week! Where will you be? We are in Hendrik Ido Ambacht, which is near Rotterdam.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #11  
Old 29 May 2005
Registered Users
Veteran HUBBer
  
Join Date: Apr 2003
Location: sydney australia
Posts: 174
well i got to say that ive yet to have any problems with my pro duro exhaust , however it is very loud... but it has certainly given my bike a huge increase in power and fuel economy, and yes the reduced volume is brilliant for panniers.
i bought the exhaust in england then road my bike to india with this can fitted.i thought it was brilliant.
im going to get my bike dyno tuned so i will let you know the results when i do...
phil.
Reply With Quote
  #12  
Old 14 Jun 2005
Gold Member
Veteran HUBBer
  
Join Date: Feb 2005
Location: albury nsw australia
Posts: 306
hello fred xtz
i amcurrently in germany but willl be coming through holland next week ,around 20 th i think ,will you be around then at all
david
Reply With Quote
  #13  
Old 16 Jun 2005
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
Yes, we'll be here. Let me know when.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
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

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 12:29.

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