Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
oilly deposit in inlet port oilly deposit in inlet port
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 13 May 2005
Contributing Member
Veteran HUBBer
  
Join Date: Mar 2003
Location: London,England
Posts: 358
oilly deposit in inlet port
Hi
My Bike yamaha TTR 600 (same engine as XT 600) started cutting out usually while at lower revs,at first it would kick start stright away but got worse and now if it will start it will either die stright away or after a few hundred yards and wont start again.
So far I have changed spark plug,HT cap,petrol,cleaned carb there was quite a bit of yellow stuff in carb a bit like rust ( I have a plastic tank)and i assumed this was the problem but still no good I have disconected and tapped up wires to side stand switch and had a look for any loose wires,also checked tappets.
Spark plug is rather black but when the bike has been runng it usually has not warmed up and choke is still on before it cuts out.
When I took carbs off I noticed there was some black oily sludge deposits in one of the inlet manifold I dont think this should be there any suggestions? and could this be my problem
Reply With Quote
  #2  
Old 14 May 2005
Contributing Member
New on the HUBB
  
Join Date: Apr 2005
Location: Rocky Mountains, Canada
Posts: 12
Hi, bolla,

Your problems sound to me like they carb are carb related. First the oily deposit sound like blowback thru the inlet valve, I wouldnt worry too much, its cured by regrinding the valves, and blowback can happen to some extent if the valves are OK. Any deposit in the float bowl is bad news, a yellow rubbery deposit is from evaporation of petrol, and gums up your jets and inlet stop valve (has the bike been standing unused for a long time?). Any grit in the float bowl, is down to it comming from the tank - get an inline petrol filter - the plastic car ones with crimped paper filter are best. Grit can also get in thru your air filter, so keep this cleaned and oiled regularly.
I would concentrate on cleaning up the carb internals if they are coated yellow, use carb cleaner and do everything - jets emulsifer tubes, inside of the float bowl, have a look at the clymer manual to see whats in there. Alternatively just get a good clean second hand carb, and put that on.

---rob
Reply With Quote
  #3  
Old 14 May 2005
Contributing Member
New on the HUBB
  
Join Date: Apr 2005
Location: Rocky Mountains, Canada
Posts: 12
Hi, bolla,

Your problems sound to me like they carb are carb related. First the oily deposit sound like blowback thru the inlet valve, I wouldnt worry too much, its cured by regrinding the valves, and blowback can happen to some extent if the valves are OK. Any deposit in the float bowl is bad news, a yellow rubbery deposit is from evaporation of petrol, and gums up your jets and inlet stop valve (has the bike been standing unused for a long time?). Any grit in the float bowl, is down to it comming from the tank - get an inline petrol filter - the plastic car ones with crimped paper filter are best. Grit can also get in thru your air filter, so keep this cleaned and oiled regularly.
I would concentrate on cleaning up the carb internals if they are coated yellow, use carb cleaner and do everything - jets emulsifer tubes, inside of the float bowl, have a look at the clymer manual to see whats in there. Alternatively just get a good clean second hand carb, and put that on.

---rob
Reply With Quote
  #4  
Old 14 May 2005
Contributing Member
Veteran HUBBer
  
Join Date: Mar 2003
Location: London,England
Posts: 358
Thanks for reply
I am also thinking its the carb but have cleaned them twice ,so maybe something is worn.
I also own an XT 6003AJ and i think I will try swapping carbs over just to see if it cures the problem with the TTR as I really need the TTR running in 2 days time.
Also does any one know the easiest way to remove the carbs? on the TTR I have to unbolt the sub frame to disconet the air box from carb mouth then undo the inlet manifold from the cylinder is their an easier way thanks.
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. 11-14
  • 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 02:05.

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