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.

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 21 Sep 2004
Registered Users
Veteran HUBBer
 
Join Date: Sep 2004
Location: Salisbury UK
Posts: 161
ITS IT THE COIL?

Hi Team

After a stirlingeffort of 4000miles most of it 2 up to the Sahara and back the XT600 3aj is being a little neglected and now refuses to start poor thing.

I think its the coil as the spark is weak and I have changed the HT cable to check its not thta new plugs etc.

Am I right and if so where can I get a cheap new one the local Yamaha store want £44

Cheers BD
Reply With Quote
  #2  
Old 21 Sep 2004
Registered Users
Veteran HUBBer
 
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
Coils hardly die, just measure the resistance and you know more. 3AJ has CDI ignition which sooner or later will be braindead.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #3  
Old 22 Sep 2004
Steve Pickford's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Jul 2003
Location: Oxford, UK
Posts: 1,025
The CDI box itself may be fine. You also need to check the resistance of the ignition pickup as descrided in the manual.
__________________
My photos: www.possu.smugmug.com
Reply With Quote
  #4  
Old 22 Sep 2004
Registered Users
New on the HUBB
 
Join Date: Aug 2000
Location: London, UK
Posts: 11
Did it work when you stopped using it?

If it did, I would think it unlikely that it is the CDI or coil.

Have you tried just draining the carb and getting some fresh petrol into it?

Muro

------------------
Reply With Quote
  #5  
Old 23 Sep 2004
Registered Users
Veteran HUBBer
 
Join Date: Sep 2004
Location: Salisbury UK
Posts: 161
RIGHT battery is on charge and I have drained and refuled the tank, So tonight we will know wether it starts. What are the symptoms of a knackered CDI UNIT? If its is the CDI are the after market parts at £75 better than the orginals.

I have a very weak spark at the moment and 10ohms resiotance across both sets of widings in the coil.

BD
Reply With Quote
  #6  
Old 24 Sep 2004
Registered Users
Veteran HUBBer
 
Join Date: Feb 2002
Posts: 212
Hi

You should also check the resistance of the coil that provides power to the CDI, can't remember what they call it.

From memory ther is this coil that provides the power to drive the electronics in the cdi unit, a second coil that provides a signal when the engine is at top dead centre and a third that provides a signal shortly after that, which is used to determine engine speed, and hence required ignition advance, by looking at the time betwen these 2 signals.

I had a problem with this "power" winding which resulted in needing to fit a new spark plug each and every time I wanted to start the engine ! Ran fine but wouldn't restart.
Finally descoverted pattern windings "power" winding a few ohms lower (no more than 10%) that figure stated in Clymer manual, changed the windings and has been fine since, over 20 000 miles.

Also, don't forget to drain the float bowl, often it is enough to do this, the petrol seems to go off in the carb worse than it does in the tank.

Another favorite for starting problems is the carb to head inlet stubs leaking, the rubber comes unstuck fron the aluminium part of the stub.

Good luck

Mark
Reply With Quote
  #7  
Old 27 Sep 2004
Registered Users
Veteran HUBBer
 
Join Date: Sep 2004
Location: Salisbury UK
Posts: 161
Its alive.

It was a combination of a badly charged battery (the optimate I have had for years has fianlly snuffed it) and old petrol. I checked the windings and they both gave the same resitance so I reassembled drained the tank and the carbs and reprimed. Hit the starter after charging the battery and she sang.

Thanks for the help all of you , off to plug around the salibury plain now and get back in shape.

BD
Reply With Quote
Reply


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


 
 


HU DVD Summer Special!

Now that summer is here, get On the Road! Take 30% off the Achievable Dream - On the Road! 2-DVD set until August 31 only. Get On the Road! Learn the tips to staying healthy, happy and secure on your motorcycle adventure!

Our veteran travellers share their tips (and great stories) for staying healthy, happy and secure on your motorcycle adventure.

"A fantastic, informative and inspirational DVD."

"It's brilliant - thank you very much!"

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


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

amazon

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 03:09.