Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Honda Tech

Honda Tech Honda Tech Forum - For Questions specific and of interest to Honda riders only. Questions comparing which bike is best etc go in the "Which Bike" forum.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11 Aug 2006
Registered Users
HUBB regular
 
Join Date: Oct 2000
Location: the world
Posts: 76
Angry Burning Oil again bugger

My 1997 Dominator motor has done 40,000 hard ish miles and was burning oil on over run. ie No blue smoke on start up or exceleration but when I back off the throttle lets say going down hill I get a blue haze forming around me. About 750 mls of oil for 600 miles. Pulled it out and got it rebuilt new rings valve seals guides etc.... Fantastic for 3000 miles and now suddenly (after one 300 mile day) I'm back to exactly the same. The motor runs great pulls well and does 50 to the gallon but why is it doing this again? Answers on the back of a postcard please I want to go to south america but I don't trust it like this help me please
Reply With Quote
  #2  
Old 11 Aug 2006
Registered Users
Veteran HUBBer
 
Join Date: Jul 2006
Location: the Netherlands
Posts: 138
you didi all that
and not the cilinder and install a new piston?
__________________
I’m not afraid to go fast, it’s the crash and burn part that sucks.
Reply With Quote
  #3  
Old 11 Aug 2006
Dodger's Avatar
Large Golden Member
Veteran HUBBer
 
Join Date: Aug 2005
Location: BC, Canada
Posts: 1,098
It sounds like it's sucking oil down the inlet valve guide on the overrun.
Check the inlet valve oil seal .
I'm not familiar with that bike ,it may not have a seal ,in which case it could be a worn valve guide .
__________________
Blessed are the cracked, for they let in the light. - Spike Milligan
"When you come to a fork in the road ,take it ! When you come to a spoon in the road ,take that also ."
Reply With Quote
  #4  
Old 11 Aug 2006
Guest2
Guest
 
Posts: n/a
Richard,
Did you find the cause for the original oil consumption?
As Dodger said, it does sound like oil being sucked down the inlet valve guide on the overrun, this could be worn valve stem or guide or faulty guide seal. Did you change the valves and guides? If new guides are put in the valve seats should be recut to make sure they line up, if not the guides could fail prematurely.
Another cause could be excess crankcase pressure forcing oil into the air box so check for excessive oil in the air box. Check all your breather pipes.
If possible do a hot compression check, if it's good and the air box is dry must be valve/guide issue. One other possible cause could be the head gasket failed between the cylinder and oil way.
I know it's frustrating when a repair does not work but if you persevere and fix it you'll have more confidence in the bike and you ability to fix it. That feeling will be worth something on your South American trip.

Steve
Reply With Quote
  #5  
Old 12 Aug 2006
Contributing Member
Veteran HUBBer
 
Join Date: Jun 2005
Location: cardigan,wales
Posts: 251
As Steve says,check the engine crankcase breathers especially that they're not kinked or pinched.Another cause i've found for this is non genuine valve stem sealsbeing fitted and being a little bit loose on the valve guide,coming adrift and letting oil in that way.
__________________
Just going for a short ride on my bike....
Reply With Quote
  #6  
Old 12 Aug 2006
Registered Users
HUBB regular
 
Join Date: Oct 2000
Location: the world
Posts: 76
Thanks

Thanks people sounds like what I expected looks like I will have to pull out the motor again as I can't work out any other way of getting the head off to have a look. A lesson learnt though I'm glad I got the motor done well before my trip at least I'm only in NZ and not the middle of Peru!!!!!!!!!!!!!!!!!!!!
Have any of you dommie owners done the carb modifications that are posted under the xrl post? I'm almost tempted when I get the motor out again but would like some feedback
Reply With Quote
  #7  
Old 12 Aug 2006
Registered Users
Veteran HUBBer
 
Join Date: Jul 2006
Location: the Netherlands
Posts: 138
i was bussy with the carb mods but crashed my bike during test runs and haven't fixed it jet to make a dyno run.
the only bike i'm riding at the moment is a pushbike
__________________
I’m not afraid to go fast, it’s the crash and burn part that sucks.
Reply With Quote
  #8  
Old 26 Aug 2006
Registered Users
HUBB regular
 
Join Date: Oct 2000
Location: the world
Posts: 76
Well after pulling the motor apart it turns out that it's been sucking dirt in through the airbox from the drain hole in the bottom and also where the filter wasn't sitting properly. I can't belive how much damage a bit of dust can do in 3000 kilometers the valves are all pitted around the edges. The new valves are scored and so is the bore. You live and learn I suppose just goes to show how important clean air is bugger
Reply With Quote
  #9  
Old 26 Aug 2006
Guest2
Guest
 
Posts: n/a
Richard,
Did you have the standard air filter?

I traveled with two friends with identical Hondas in very dusty conditions, one had the Honda filter and started to run badly as it cloged up, the other with an aftermarket filter (I think it was a cotton type filter) kept running OK but when we checked dust was getting past the filter, we could see a layer of dust on the carb inlets. I think foam filters are possibly the best option for re-usable filters.

Hope you get the bike up and running quickly without to much expense.

Steve
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
Burning poor fuel in XR650R reinhold Honda Tech 6 24 Jul 2006 17:49
airhead burning blue at startup Fly Guy BMW Tech 2 1 Dec 2005 16:56

 
 


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 04:52.