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 25 Aug 2007
Registered Users
HUBB regular
 
Join Date: Aug 2007
Location: essex
Posts: 28
alternator check

hi i got my xt 550 running great then taped all my loose wires up and now it wont start again. how do i check the wires from the gen ? or could it be the cdi is there any way of checking ?
thanks
Dave
Reply With Quote
  #2  
Old 25 Aug 2007
Registered Users
Veteran HUBBer
 
Join Date: Feb 2007
Posts: 289
YES. Follow the advice from this page, is the better thing to do in case of electrical problems.

Motorcycle Electrical Parts (ElectroSport Industries)
Reply With Quote
  #3  
Old 26 Aug 2007
Registered Users
HUBB regular
 
Join Date: Aug 2007
Location: France
Posts: 33
You can't directly check your CDI without a known good one to check it against. It's a process of elimination, where if everything else fails, your CDI is probably shot.

The 550 ignition system, being CDI and not TCI, is very simple. You don't need the reg/erct, battery, lighting circuit, etc. All you have is the generator, cdi, coil, plug, ignition switch and kill switch, the rest is entirely separate. Forget the battery circuit for the moment, it's utterly irrelevant.

You'll need a multimeter, and an electrical schema wouldn't go too far amiss either - here's one in italian - http://digilander.libero.it/XT_550/I...co%20XT550.jpg

First thing to do is to check the kill switch. All sorts of crap can get in there, they can block up and fail. It works by earthing the CDI, so the easiest way to test it is simply to disconnect it entirely. Check for continuity between the kill switch contact (where the black and white wire runs in) on the socket and the frame. continuity when in "off" position, none when in "run".

Now the ignition switch (key). Check for continuity on the black and white wire running in and running to earth. Again, only continuity when it's off / lock / park

Now check the wire feeding the kill switch / ignition switch from the CDI. There should be continuity between both ends (obviously), and *no* continuity from either end to earth. This is the black-and-white wire from the CDI.

All good? Time to check the "hot" side of the coil. remove the sparkplug, and reattach it to the plug cap. check for continuity between the centre electrode and earth (should be) and the outer electrode and earth (shouldn't be, as long as the plug is away from the motor. Common failure here is HT lead disconnect from plug cap, shot contacts in the cap itself, shot cap, bad connect from coil to HT lead, bad connect between coil and earth.

Test resistance of hot side of coil (resistance between orange lead into coil and plug electrode) against spec.

Test resistance of cool side of coil (orange to black) against spec.

all still good? Test continuity between orange from CDI to orange in to coil. should be good, with no continuity to earth.

Now check the generator. continuity between red and brown from generator, and resistances good. No continuity between red or brown and earth.

you can't really check the advance detector without a strobe, so plug and unplug repeatedly. contact cleaner if you have any. it's the 3-way connector from the generator with white/red, white/green and green wires.

If that all still checks out, it could well be your CDI that's shot. double-check the earths (black wires) on the CDI to be sure, and all earth connections to the frame, but that's about all you can check.

You can use a non-yam CDI to check, the easiest one to use is a C50/70/90 CDI (and has the benefit of being cheap as chips). This has no advance, so you connect to either the white/red or white/green pulser and the green, plus the red and brown. If you connect the wrong pulser your ignition will be too advanced, and it will throw you off when you kick it over. if you connect it to the right one, the bike should run, but you will only get about 3.5-4K RPM tops. This is all a last resort, though.

FWIW, my money is on something being earthed that shouldn't, or a bad connection on your HT lead.

Simon
Reply With Quote
  #4  
Old 26 Aug 2007
Registered Users
Veteran HUBBer
 
Join Date: Mar 2007
Location: UK
Posts: 3,397
Thumbs up

Simon/tufty,
You are better than any workshop manual!! Who needs one with you around? I wish you had been here earlier when my TT600R had electrical issues (sorted now).

Cheers,
__________________
Dave
Reply With Quote
  #5  
Old 26 Aug 2007
Registered Users
HUBB regular
 
Join Date: Aug 2007
Location: essex
Posts: 28
thanks i will give that a try
regards
Dave
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


 
 
 

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

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 11:58.