Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
XT225 Poor Acceleration XT225 Poor Acceleration
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 Andy Miller, UK, Taking a rest, Jokulsarlon, Iceland

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


Photo by Andy Miller, UK,
Taking a rest,
Jokulsarlon, Iceland



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 6 Mar 2008
Registered Users
HUBB regular
  
Join Date: Jun 2007
Location: North Carolina
Posts: 22
XT225 Poor Acceleration
We just crossed the sahara with two xt225s and are currently in Dakar. One of them is now accelerating poorly. Low end seems fine but in 4th gear and above, midrange to top end acceleration is far weaker than before. I just serviced them and cleaned out all the sand from the chains, tightened the chains, cleaned air filters and changed the oil.

We just drove through a lot of sand so I am wondering if something got in the carburetor. Anyone have any ideas as to the cause of this considering the driving we've been doing? And also how to fix it...I have never messed with the carburetors so this is new to me.

Thanks for the help!

Gael
__________________
Traveling through Africa on 2 Yamaha XT225s
www.gaelandsonja.com
Reply With Quote
  #2  
Old 6 Mar 2008
Registered Users
Veteran HUBBer
  
Join Date: Mar 2007
Location: UK
Posts: 4,343
Hi Gael,
I don't know about your bike (it sure makes a change from an XT600!) but there are quite a few technical advice sources, such as:-

XT225 Home 2006

XT225 Serow Riders in the UK/USA

I agree with your basic line of questioning: what has changed, especially recently, that could have caused the fault?

You could try changing things over between the two bikes (this is often quoted as a great reason to travel with 2 or more bikes of the same type). e.g. swop the carbs over and see what happens. If you go down this route, swop one thing at a time and look for the effect!
Also, just have a good look at both of them first, compare, and see if there are any obvious differences, such as a split carb to cyl rubber.

Mid-top end range could be caused by "that part" of the carb which operates at full throttle, depending on the carb type/design (hopefully one of those links has good first hand info).

It could also be an electrical problem, so don't discount anything just yet!

Good luck,
__________________
Dave
Reply With Quote
  #3  
Old 6 Mar 2008
Moderator, Contributing Member
Veteran HUBBer
  
Join Date: Sep 2005
Location: Lancashire England
Posts: 313
Hi Gael,

as Walkabout has suggested, come on over to our site at XT225 Home 2006 and raise your question in the bulletin bards and I'm sure you'll receive an answer.

Carbs arn't difficult to work on, just be systematic in your approach and use plenty of carb cleaner!

Of course you could always do a write up on your adventure, as the group would love to hear of your travels.

Good luck.
Reply With Quote
  #4  
Old 6 Mar 2008
Registered Users
HUBB regular
  
Join Date: Jun 2007
Location: North Carolina
Posts: 22
thanks for the response guys. I am a member of xt225.com and usually go there for help but for some reason I can't access it from here. I thought the site was down or perhaps some issues with the DNS server from senegal. Who knows. I checked the spark plugs and they were very used, replaced them on both bikes. That helped a little. Considering all the sand, I think something just got in there and I need to clean them thoroughly. I am just a little worried since I have never messed with carbs before.

I plan to do a full trip report soon. We have come all the way from the east cost of the US. Shipped to Barcelona and then down from there along the coast. It's been great so far.

Speaking of XT600's, tons of them around here. I've seen at least 10 just in Dakar and several down the petite cote as well.

We're off tomorrow to Casamance, then Guinea Bissau, Guinea, Mali, Burkina Faso, Togo, Benin and then perhaps as far as South Africa.

We'll keep you posted and I'll get some pics up in a trip report soon.

Thanks for anymore help on the issue.

Gael
__________________
Traveling through Africa on 2 Yamaha XT225s
www.gaelandsonja.com
Reply With Quote
  #5  
Old 6 Mar 2008
Registered Users
Veteran HUBBer
  
Join Date: Mar 2007
Location: UK
Posts: 4,343
Question intake rubber?
Quote:
Originally Posted by Walkabout View Post
Hi Gael,

XT225 Home 2006

XT225 Serow Riders in the UK/USA

such as a split carb to cyl rubber.

Good luck,

Reading both of those sites (but I can't remember which one said what!):- one of them reckons that the intake rubber can be perished at 5 years old+.
Possible cause?

This site has the line diagram for your carb and it has a rubber diaphragm (could be splitting?): as per the cameraman, it is not too complicated:-
Engine Assembly: Carburetor
__________________
Dave
Last edited by Walkabout; 6 Mar 2008 at 19:41.
Reply With Quote
  #6  
Old 7 Mar 2008
AliBaba's Avatar
Registered Users
Veteran HUBBer
  
Join Date: Apr 2001
Location: Norway
Posts: 1,379
Beside the diaphragm-issue I would have swapped coil and ignition leads.

Compare the compression on the two bikes (press down kick with your hand), does the oil smell petrol?
Reply With Quote
  #7  
Old 7 Mar 2008
Registered Users
Veteran HUBBer
  
Join Date: Oct 2006
Location: Northumberland
Posts: 185
I wouldn't strip the carb as the first job, First check compression and also check the clutch worn clutch's first start by slipping in high gears at high rev's.
__________________
Home of the UK Coast 2 Coast off-road Challenge
www.C2CChallenge.co.uk www.4X4Safari.co.uk
Reply With Quote
  #8  
Old 7 Mar 2008
Registered Users
HUBB regular
  
Join Date: May 2007
Location: Phoenix
Posts: 68
If you have the time, and your two bikes are the same, you could swap the carbs from bike to bike, coils and so forth until you isolate the offending part. Then you can take corrective action. Be sure if you do this, there are not any gaskets that you might need. I have only seen a 225, so I cant offer much other help other than make sure the tank is venting properly. you could test this buy cracking the pettol tank cap open a bit when you are in the RPM range you're having problems in.
Good Luck, Steve
Reply With Quote
  #9  
Old 8 Mar 2008
Registered Users
New on the HUBB
  
Join Date: Feb 2007
Location: Dublin, Ireland
Posts: 19
My TTR250 (close relative engine-wise) had similar symptons recently. Turned out to be a seized rear wheel bearing. It's a torquey engine so it wasn't noticeable at low speeds.
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
CB750 or xt225 PatOnTrip Which Bike? 9 17 Dec 2006 08:55
Xt225 Serrow Carb Prob Oz Yamaha Tech 3 14 Dec 2006 04:33
XT225 Serow - bad fluffy running Tony Robson Yamaha Tech 1 25 Mar 2004 16:10
yamaha xt225 vs Kawasaki KLR250 Seth S Which Bike? 1 30 Aug 2002 17:51

 
 

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. 11-14
  • 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 09:45.

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