Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
black smoke black smoke
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 22 Sep 2002
Registered Users
HUBB regular
  
Join Date: Apr 2002
Location: London
Posts: 60
black smoke
hello all,

my 1VJ starts up very easily when cold, however when it has warmed up it is much more difficult to kickstart. i have to open the throttle full and kick hard. it starts up but blasts out a thick cloud of black smoke.

any ideas as to the cause of this.

thanks.
Reply With Quote
  #2  
Old 22 Sep 2002
Registered Users
HUBB regular
  
Join Date: Feb 2002
Location: Australia
Posts: 28
black smoke is generally fuel, sounds like when you open the throttle it gets a big dose of fuel which burns off when it starts. As to the reason why it needs so much to start i wound not know.
Reply With Quote
  #3  
Old 23 Sep 2002
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360

Your idle fuel/air mixture needs adjusting.
With hot engine, turn the small screw under the carb in until engine starts running worse, then turn it out until it starts running worse, then go back to a position in the middle.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #4  
Old 24 Sep 2002
Registered Users
Veteran HUBBer
  
Join Date: May 2002
Location: London, UK
Posts: 635
sounds like its running so rich that it will start from cold without choke, but then fail to start when hot. did you check the airfilter is clean? if its new, did you remove the bag ;-) is the choke cable properly adjusted?
Reply With Quote
  #5  
Old 24 Sep 2002
Registered Users
Veteran HUBBer
  
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360

Or maybe the choke piefie in the carb is stuck. Check that it's sliding in and out freely and fully [that's what she said last night too].

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #6  
Old 26 Sep 2002
Registered Users
HUBB regular
  
Join Date: Sep 2002
Location: uk
Posts: 83
Hi.
Why are you having to use the kickstart anyway? A good 1VJ should start immediatly hot or cold on the electric start.
By now most 1VJs will have had so many carb "rebuilds" that you are bound to find somethihg that could cause bad starting.
Carb rubbers, float height, float needle jet o-ring (dries up and doesnt seal), choke plunger sticking or cable tight etc etc.
On the subject of black smoke on full throttle, most engines would do this anyway.
Also dont dismiss an ignition problem when warm - Quite common. Source coil windings usually, sometimes CDI unit.
Let me know what you find.
David Lambeth.
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

 
 

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. 11-15
  • 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 00:36.

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