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.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

LinkBack Thread Tools Display Modes
Old 9 Aug 2010
Registered Users
New on the HUBB
Join Date: Aug 2010
Location: Thailand
Posts: 2
XT225 No power at low revs


I have an XT225 that is fine at high revs but at lower revs suffers from a huge lack of power. I have to slip it into first gear to get up the steeper hills even with just me on the bike (80kg). I used to be able to get up those hills in 2nd or even 3rd gear before.

I don't know if this is related or not but it also has problems starting from cold. Fortunately I live on a hill so it is very easy for me to bump start it. It coughs and splutters for the first 100m but then it is ok though it does have a tendency to die if I don't keep the revs up a little.

The trouble is that I live in a sleepy little place in Thailand and the mechanics here don't really have much of a clue regarding bigger (imported) bikes. And, to be honest, I am not the most mechanically minded person either.

Does anybody have any ideas?

Many thanks.
Reply With Quote
Old 9 Aug 2010
Registered Users
Veteran HUBBer
Join Date: Jun 2010
Location: New Port Richey FL
Posts: 162
several things to check. first is very simple. check your sparkplug, replace it is probably the best bet.

next, is the carburetor. it has two important jets in it, a main, and pilot jet. the pilot jet basically runs things from idle to about 25% throttle, give or take, and the main is from there on, or a certain engine speed and above.

if either,or both are dirty, you're not going to have a good running bike. remove and blow them out if you can with an air compressor. if you cant see light through them, they arent clear.

also clean the bowl of the carburetor as well. any dirt or sediment in there, will get stirred up while the bike runs, which will result in poor performance and rough running/lack of power.

also, have the valve clearnces checked. its a pretty simple job, but must be done with the motor cold, like dont even start it in the morning kind of cold. a valve out of spec will make a bike lose power if it isnt sealing entirely. easy adjustment.
Reply With Quote
Old 9 Aug 2010
oothef's Avatar
Registered Users
Veteran HUBBer
Join Date: Feb 2010
Location: york
Posts: 265
Check the air filter, just remove it and see how it runs- better or worse?
Have a good look at the inlet rubber between carb and head check for cracks or splits.
Poor starting points to weak running, air leaks or blocked jets, first things to check.
Anything can happen in the next half hour
Reply With Quote
Old 9 Aug 2010
Registered Users
Veteran HUBBer
Join Date: Apr 2003
Location: Manchester UK
Posts: 235
Sounds to me like you may be running too rich and the bike is bogging down under low rev load. Check the colour of your plugs (biscuit brown is good, black is rich, whiteish is lean) and adjust the pilot needle / float hight accordingly. A give away is if blipping the throttle in neutral you produce excessive brownish smoke from the exhaust. Other than that check your coils are not breaking down under load.
Reply With Quote
Old 10 Aug 2010
Registered Users
New on the HUBB
Join Date: Aug 2010
Location: Thailand
Posts: 2
Thanks very much guys. Will try to check these things out asap. Cheers.
Reply With Quote
Old 10 Aug 2010
Registered Users
Veteran HUBBer
Join Date: Apr 2006
Location: Staffordshire. uk
Posts: 776
Alan, you need to post your questions on XT225.com.

These guys have a lot of experience in setting up your bike. They come from the factory set very lean. There are simple mods to rectify this as well as information on getting the jetting right for riding at altitude. give them a try.
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
Thread Tools
Display Modes

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
12v Power Socket & GPS Power Lead Trichelia Yamaha Tech 7 29 Apr 2010 11:13
TS185L Starts and runs, revs fine at idle, won't go over 30MPH EAnchak Suzuki Tech 31 17 May 2009 21:28
Charging at high revs themansfield Yamaha Tech 4 8 Apr 2008 07:24
CB750 or xt225 PatOnTrip Which Bike? 9 17 Dec 2006 07:55
GPZ 500 poor response at low revs (Mojacar Spain) password Kawasaki 3 14 Dec 2006 15:46


NEW! HU 2015 Motorcycle Adventure Travel Calendar is now available! Get your copy now for some terrific travel inspiration!

HUGE, 11.5 x 16.5 inches, beautifully printed in Germany on top quality stock! Photos are the winning images from over 600 entries in the 9th Annual HU Photo Contest!

Horizons Unlimited 2015 Motorcycle Adventure Travel Calendar.

"The calendar is magnificent!"

"I just wanted to say how much I'm loving the new, larger calendar!"

We share the profit with the winning photographers. YOU could be in the HU Calendar too - enter here!

Next HU Eventscalendar

See all events


HU DVD Autumn Special!

Take 40% off Road Heroes Part 1 until October 31 only!

Road Heroes features tales of adventure, joy and sheer terror by veteran travellers Peter and Kay Forwood (193 countries two-up on a Harley); Dr. Greg Frazier (5 times RTW); Tiffany Coates (RTW solo female); and Rene Cormier (University of Gravel Roads).

The first in an exciting new series, Road Heroes features tales of adventure, joy and sheer terror by veteran travellers."Inspiring and hilarious!"

"I loved watching this DVD!"

"Lots of amazing stories and even more amazing photographs, it's great fun and very inspirational."

"Wonderful entertainment!"

Check it out at the HU Store! Remember to use Coupon Code 'HEROES' on your order when you checkout.

Scottoiler automatic chain oilers. The most important accessory for your next motorcycle adventure!

Renedian Adventures

Renedian Adventures

What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders

contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!

What turns you on to motorcycle travel?

Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!

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 R80 G/S motorcycle.

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 (22 this year!); 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, the HUBB or to receive the e-zine. 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.

Books & DVDs


All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.

Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!

All times are GMT +1. The time now is 13:25.