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 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 14 Apr 2008
Registered Users
HUBB regular
 
Join Date: Dec 2007
Location: Christchurch,New Zealand
Posts: 95
Can someone please tell me about this-link inside.

Was searching the net and found a link from this site to another - XT-Tipps
I have used online translators to try to find out what's being said,but I can't make it out.
What I'm after is the bit about half way down about drilling a bigger hole in your secondary carb slide plate.
What is this ment to do? When translated it doesn't really make any sense other than something about response.
Reply With Quote
  #2  
Old 14 Apr 2008
Registered Users
Veteran HUBBer
 
Join Date: Jan 2001
Location: Stockholm
Posts: 651
Response

- Ansprechverhalten
Im Sekundärvergaser hat der Unterdruckkolben eine kleine Bohrung im Boden. Es macht Sinn, sie ein klein wenig zu vergrößern. 3,0 - max. 3,5 mm Durchmesser. Das macht sich im Ansprechverhalten bemerkbar. (Hat aber rein garnichts mit mehr Leistung zutun).

It is about the little hole in the secondary slide that 'communicates' the vacuum in the throat to the top of the membrane. This vacuum lifts the slide, opens the throttle.
If you increase the diameter to 3 mm, from 1,8 mm, the response to opening the throttle will be faster, as more air can flow through the larger hole. No increase of power though.

Auke
__________________
Auke
http://aukemarieke.blogspot.com
Reply With Quote
  #3  
Old 14 Apr 2008
spooky's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Jul 2007
Location: Utopia/Germany
Posts: 279
right,.... faster throttle response, one of the cheapest way to do a bit tuning on the carb.
I done it on my Mikuni Carb for my KTM LC4 640, opened this holes from STD-6mm to 8.5mm-9mm but left the stronger STD spring to prevent bouncing of the slider for off-road riding.
The SuperMoto guys additionally fit a softer spring as well, but only move there bikes on tarmac, if used offroad or on bad tracks, the slider will bounce to quick and the result is a splutter in the carb.
Bike factories have to keep the set-up down to get there bikes road legal and usable for many conditions, tuning is not on there mind.

And yes change the jet's and needle and your bike will be all different, with a lot more fun factor in it.... ;o)
__________________
The trouble is that he was talking in philosophy, but they were listening in gibberish.
Reply With Quote
  #4  
Old 14 Apr 2008
Registered Users
HUBB regular
 
Join Date: Dec 2007
Location: Christchurch,New Zealand
Posts: 95
So instead of opening at 1/2 throttle as per normal,it'll open sooner? Is that how I'm reading that?
Reply With Quote
  #5  
Old 14 Apr 2008
spooky's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Jul 2007
Location: Utopia/Germany
Posts: 279
Quote:
Originally Posted by Yobbo View Post
So instead of opening at 1/2 throttle as per normal,it'll open sooner? Is that how I'm reading that?
well sort of... ;o)
you will get a easier, faster and better throttle response with less effort on your gas hand, the vacuum will do a bit more of that job for you, more than STD, all part of the puzzle in addition with the bigger jets and needle game.
I was sceptical in the beginning too, but like it a lot now.

there are some rally people in Germany who are in to Yamaha bikes and speak English too, have a look at: Home
they sale all sort of tuning stuff specially for the XT bikes, and will tell you a lot on what sort of setup will be best for you and your bike.

As I'm riding a KTM LC4 I had all my data for tuning my carb from K T M - S O M M E R
I'm saying that be course it's not that easy to just throw any kind of bits together to find a good tuning, there are some tried and tested variations, but to open the slider holes up to the right size will be a start any way.... (don't over do it... 0.5mm to 2mm can make a big difference)
__________________
The trouble is that he was talking in philosophy, but they were listening in gibberish.
Reply With Quote
  #6  
Old 14 Apr 2008
Registered Users
HUBB regular
 
Join Date: Dec 2007
Location: Christchurch,New Zealand
Posts: 95
Thanks for that,might have to have a go at it in the weekend.
Reply With Quote
  #7  
Old 15 Apr 2008
Registered Users
Veteran HUBBer
 
Join Date: Jan 2001
Location: Stockholm
Posts: 651
Not quite

The throttle will not open more, but will open faster. The stable throttle opening position will be the same, but will be reached earlier.

Auke
__________________
Auke
http://aukemarieke.blogspot.com
Reply With Quote
  #8  
Old 15 Apr 2008
Registered Users
HUBB regular
 
Join Date: Dec 2007
Location: Christchurch,New Zealand
Posts: 95
Just did it,took it out to 3mm,makes quite a noticeable difference.
Reply With Quote
  #9  
Old 17 Apr 2008
bacardi23's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Sep 2007
Location: XXX<-Portugal->Azores->Santa Maria (island)
Posts: 1,544
Yobbo....What do you notice more now?
Reply With Quote
  #10  
Old 17 Apr 2008
Registered Users
HUBB regular
 
Join Date: Dec 2007
Location: Christchurch,New Zealand
Posts: 95
Just seems like more grunt from down low.I guess thats because both carbs are opening pretty close together.
Example being - give it full throttle,4th gear at 40km/h and it just takes off.It used to anyway,but you can feel a bit more surge or urgency about it.
Reply With Quote
Reply


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
Do you wear you pants inside or out..... tmotten Equipment Reviews 27 9 Apr 2008 14:27
Never let anyone trick you into looking inside your wallet. gatogato TRAVEL Hints and Tips 3 14 Feb 2008 22:35
Shipping inside USA - west to east geokobbi Trip Transport 2 20 Jul 2007 00:42
fed ex or dhl a laptop inside mexico? wyomex TRAVEL Hints and Tips 0 8 Oct 2005 03:28
transport inside the UE Pedro Rocha Trip Transport 2 26 Mar 2003 01:19

 
 

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!

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 10:25.