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

BMW Tech BMW Tech Forum - For Questions specific and of interest to BMW 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.

7 Litre Camel Tank Lets You Explore More, Click to Find out More!

LinkBack Thread Tools Display Modes
Old 8 Jan 2009
Registered Users
New on the HUBB
Join Date: Jan 2009
Posts: 2
cleaning old fuel out of carbies

Hi there. I'm resurrecting my '86 BMWR80G/S and unfortunately I stupidly left some fuel in the tank. So now I have a rusty tank and carbies. Ive disassembled the carbies and need to remove the lacquer like substance all over the carbie parts. Any ideas what to soak them in? As for the tank I've seen some commercial preps from the US that removes,neutralises and coats the tank.
Many thanks.
Reply With Quote
Old 8 Jan 2009
Registered Users
Veteran HUBBer
Join Date: Apr 2008
Location: West Yorkshire UK
Posts: 1,226
The fluids are marketed as carb cleaner, basically ethanol or some other low flash point stuff by the smell. If they have rust in them getting them to somewhere with an ultrasonic parts cleaner would be a thought.

For the tank Petseal and similar works. Take care, the curing process makes lot of heat. Follow the instructions carefully.

Reply With Quote
Old 8 Jan 2009
Registered Users
Veteran HUBBer
Join Date: Oct 2002
Location: Stockholm - Sweden
Posts: 316
Välkommen till EVP bought an ultrasonic cleaning device for the B&S carbs. He has shown me the result. I want one too!

What I have done over the years is to use solvent, thinner / naphta. You can use diesel or kerosene as well. Submerge the carb completly in it. Use a brush, tooth brush, nail brush, or whatever I have at hand.
This usually do the trick. Blow them clean with compressed air. Then use dairy (or is it fairy...) fluid handdishwashing cleaner (called "Yes!" in Swedish); or if that is not doing the trick I spray on the special owen cleaner by the same company ("Yes! Power) (somewhat acid though - will discolour the aluminum).

You will however need to have taken apart the carbs nearly compleatly to do this cleaning job. You can leave the butterfly valve in the carbs, but be aware that the o-ring sealing may be damaged by the solvent.

You may need to use the small clock screw-drivers that you can find on the market, to scrape off oxidations, resin, dirt, oil, asphalt, paper gasketts, etc.

Be sure to use new gaskets when rebuilding the carbs!
The o-rings are a pain in the ... to get in place... will proably cost you a few to learn how to do it... (=I avoid messing with them).

When you close the butterfly valve you may notice that is does not shut-off the tube compleatly... can be adjusted. You need new screws and a new shaft - just in case... It is brass and the screws are lock-tited...

The choke has a casting residue inside. Grind that away! The casting residue can "jam" the choke as it pivots. Never had a choke getting stuck for me since I began fixing this BMW "sloppyness". Regrease choke. Soak the gasket in grease - seal better and you will not need to scrape the paper gasket off the carb at the next renovation. Use cupper paste of preferably Omega 99 (anti-seazure) on the screws, and choke axel.

Replace the diaphragms - they are usually worn-out. They do -not- like solvent!!! So if you do not need to change them - be very careful with them. Soap or hand-dishwashing fluid is just about it that they accept.

I sometimes get my parts from:
Bing Home Page
And... do buy their tuning manual - it is really good and very helpfull. Bought mine in 1994, so I guess there are several up-dates since then making it even better -

Happy Washing!
Drive Safely,
Reply With Quote
Old 8 Jan 2009
Brian Williams's Avatar
Contributing Member
Veteran HUBBer
Join Date: Oct 2006
Location: england
Posts: 140
Carb cleaner spray and soak in white vinegar overnight (mildly acidic cleans the crud and brings a sparkle)
rust & dust
Reply With Quote
Old 24 Jan 2009
Registered Users
New on the HUBB
Join Date: Jan 2009
Location: Den Hoorn Zuid-Holland
Posts: 6
Boiled carbs

I boiled Dnepr carbs in white vinegar for 30 minutes. Give a nasty smell, but they where very clean.
Reply With Quote

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
cleaning old fuel out of carbies phoenixbeemer Tech 2 14 Jan 2009 05:22
cleaning boots kevinhancock750 Camping Equipment and all Clothing 14 24 Feb 2008 19:13
Carbies MadMax Yamaha Tech 3 18 May 2007 09:26
sheepskin cleaning jkrijt Travellers' questions that don't fit anywhere else 3 26 Jul 2006 01:37
Cleaning K&N without K&N cleaner and oil? cornepol Equipping the Bike - what's the best gear? 8 16 Nov 2003 15:07


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!

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.

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


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 04:49.