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 Daniel Rintz, Himba children, Namibia

The only impossible journey
is the one
you never begin

Photo by Daniel Rintz,
Himba children, Namibia



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10 May 2009
Tenere Tom's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Aug 2007
Location: Leeds UK
Posts: 449
Blowing main fuse - HELP!!!

I recently replaced the gasket (ignition side) on my Tenere (1984) due to it leaking oil.
Everything went OK till a few days later. I got the bike out and it wouldn't start. I then noticed the lights were not working. I checked the main fuse and it had blown.

I replaced it thinking everything would be fine but as soon as the ignition was switched on it blew.

I have traced the fault to the ignition circuit, when the CDI is disconnected it doesn't happen.
I had a spare CDI to hand so I tried that and the same thing happens.

Has anyone had a similar problem?
How is it fixed

Basically I'm at a loss - I'm an electrician and it doesn't make sense to me.
__________________
Tom
I'm a country member...
Reply With Quote
  #2  
Old 10 May 2009
BlackDogZulu's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Oct 2008
Location: West Wales, UK
Posts: 753
Well I'm not an electrician but my guesses are:

1. Two duff CDI units - unlikely but possible

2. Fault in the wire to the CDI or the connector, thus showing only when the CDI is in circuit.

But that could all be b*llocks, of course.
__________________
2006 XT660R daily ride, 1994 XT600E about to be reborn, Blog: http://goingfastgettingnowhere.blogspot.com/
Reply With Quote
  #3  
Old 10 May 2009
wolfzero's Avatar
Registered Users
Veteran HUBBer
 
Join Date: May 2009
Location: uk
Posts: 434
you need to take the cover off and re check there first sounds like a pick up wire has been dislodged and rubbed through to short out
__________________
XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover
Reply With Quote
  #4  
Old 10 May 2009
Tenere Tom's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Aug 2007
Location: Leeds UK
Posts: 449
Quote:
Originally Posted by wolfzero View Post
you need to take the cover off and re check there first sounds like a pick up wire has been dislodged and rubbed through to short out
I disconnected the wiring from the pick up while I was looking earlier and it didn't make any difference.

It is deffo the ignition side of things that's at fault.

Any more ideas???
__________________
Tom
I'm a country member...
Reply With Quote
  #5  
Old 10 May 2009
wolfzero's Avatar
Registered Users
Veteran HUBBer
 
Join Date: May 2009
Location: uk
Posts: 434
disconect the 6way at the cdi if it blows then you need to a continuity check between the cdi plug and that pickup conector then check its not shorting to earth thats the only thing that would blow the fuse other than the cdi being faulty
__________________
XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover
Reply With Quote
  #6  
Old 10 May 2009
Registered Users
Veteran HUBBer
 
Join Date: Jun 2008
Location: yorkshire england
Posts: 201
hi tom, not an easy problem to solve it sounds like a live wire is earthing somewhere try disconecting one be one all switchs etc . also are all the earth wires ok . get the multimeter out and put the kettle on, and get a bag of fuses in . good luck zigzag
Reply With Quote
  #7  
Old 10 May 2009
Tenere Tom's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Aug 2007
Location: Leeds UK
Posts: 449
Cheers guys - you are all talking sense!!!

I'll be getting my meter from work tomorrow and will have it sussed out before long.

Look forward to seeing you at Squires soon Gaz
__________________
Tom
I'm a country member...
Reply With Quote
  #8  
Old 13 May 2009
Tenere Tom's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Aug 2007
Location: Leeds UK
Posts: 449
It's looking like there is a fault on the loom.
There's a dead short on the +ve and -ve (battery terminals) when the ignition is switched on.

I checked the main fuse that had blown and it was a 30A which seems a bit high to me.

I'm thinking there's been a bit of melting plastic going on in the loom and 2 cores have become in contact with each other.
Until I get some more time to sort it I'll be riding my lads moped
27mph!!! It's getting de-restricted as soon as possible too!!!
__________________
Tom
I'm a country member...
Reply With Quote
  #9  
Old 13 May 2009
Registered Users
Veteran HUBBer
 
Join Date: Jun 2008
Location: yorkshire england
Posts: 201
hi tom the fuse or circuit breaker is only rated at 10 amps so to blow a 30 amp fuse some thing might have been iffy for a while , i hope the wires are not fried too bad and its not total meltdown ,good job your a sparky zigzag -----27 mph so no speeding ticket tom , peddle faster mate
Reply With Quote
  #10  
Old 14 May 2009
BlackDogZulu's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Oct 2008
Location: West Wales, UK
Posts: 753
Old joke: at least you won't get done for speeding, but you might get arrested for kerb-crawling.

Boom-tish.

__________________
2006 XT660R daily ride, 1994 XT600E about to be reborn, Blog: http://goingfastgettingnowhere.blogspot.com/
Reply With Quote
  #11  
Old 14 May 2009
wolfzero's Avatar
Registered Users
Veteran HUBBer
 
Join Date: May 2009
Location: uk
Posts: 434
tom you said "when the CDI is disconnected it doesn't happen"
is this no longer the case if so give details and i should be able to point you in the right direction as i've been working with auto electrics for nearly 20yrs
__________________
XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover
Reply With Quote
  #12  
Old 14 May 2009
Tenere Tom's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Aug 2007
Location: Leeds UK
Posts: 449
Quote:
Originally Posted by wolfzero View Post
tom you said "when the CDI is disconnected it doesn't happen"
is this no longer the case if so give details and i should be able to point you in the right direction as i've been working with auto electrics for nearly 20yrs
Yep that's right. I also disconnected the earth on the coil and it stopped too.
__________________
Tom
I'm a country member...
Reply With Quote
  #13  
Old 15 May 2009
wolfzero's Avatar
Registered Users
Veteran HUBBer
 
Join Date: May 2009
Location: uk
Posts: 434
"I also disconnected the earth on the coil and it stopped too"

that is rather missleading i think it possibly a short in the loom where it runs from the cdi down the frame about half way down the length of the seat, check for signs of rubbing through and heat damage.

i'll dig out the wiring diagram later and do you a test sequence to follow if you cant see anything obvious on the loom.
__________________
XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover
Reply With Quote
  #14  
Old 15 May 2009
Tenere Tom's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Aug 2007
Location: Leeds UK
Posts: 449
Quote:
Originally Posted by wolfzero View Post
i think it possibly a short in the loom where it runs from the cdi down the frame about half way down the length of the seat, check for signs of rubbing through and heat damage.
I'd have to agree with you - I'm going to disconnect everything from the loom and check the insulation between the cores. I'm pretty sure it will be a short somewhere.
__________________
Tom
I'm a country member...
Reply With Quote
  #15  
Old 17 May 2009
wolfzero's Avatar
Registered Users
Veteran HUBBer
 
Join Date: May 2009
Location: uk
Posts: 434
mine had rubbed through where i said and had damaged the wiring to the reg/rectifier, but depending on the twist in the loom might rub through the cdi wiring.
__________________
XT 630 SUPERMOTO

GSXR750L KMX200

RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
XT600E main fuse workaround? BlackDogZulu Yamaha Tech 16 11 Nov 2014 15:13
Rear Bulbs Blowing underbeing Yamaha Tech 3 20 Oct 2007 20:53
TT600RE Blowing oil. bikerfromsark Yamaha Tech 3 8 Oct 2007 16:11
XR400 blowing oil out of crankcase....HELP!!!! davidlomax Honda Tech 2 8 Jul 2007 03:48
Where is the fuse? simmo Yamaha Tech 2 23 Dec 2004 11:11

 
 

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

HU Event and other updates on the HUBB Forum "Traveller's Advisories" thread.
ALL Dates subject to change.

2024:

Add yourself to the Updates List for each event!

Questions about an event? Ask here

HUBBUK: info

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...

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 17:32.