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.

Parts & accessories for adventure touring motorcycles including GPS mounts, panniers, luggage, protection, dry bags, camping gear, tools, books & DVDs.

LinkBack Thread Tools Display Modes
Old 16 Aug 2010
Registered Users
New on the HUBB
Join Date: Aug 2010
Location: Patra
Posts: 1
Question 2005 R850R oil leakage

Hello everyone,

I recently bought a 2005 R850R with about 20000km. When I did a first "light" service (oil/spark plug change, battery charging, changed filters, no cylinders/cylinder covers were opened etc), I got an oil leakage at the right cylinder.
When I ride up to 1/2h with low rpm (<4000) nothing seems to happen. When I ride at the highway for longer than 1/2h with a medium or high speed oil starts to leak on my boots, and the bottom of the right cylinder soon becomes full of oil. If I stop then, some drops fall to the ground for a while. I cleaned up the cylinder several times to watch where the oil comes from. It probably comes from the camshaft sprocket cap since it is the first that starts to fill with oil and a nut underneath this cap is the first point where oils starts to drop. I had taken a relatively long ride before having the service and did not notice anything (maybe the oil level was low by then, did not checked it).
What are the most possible oil leak sources in this case? The camshaft cap or the O-ring inside it? the gasket at the cylinder head (valves cover?). The gasket at the bottom of the cylinder seems clean. Is there a chance that there is a "more internal" problem?
The previous owner must have had an accident and the top of the cylinder is slightly scratched. Do you think a fall he may had, has "shaked" somehow the cylinder and affected something inside?
Reply With Quote
Old 16 Aug 2010
Registered Users
HUBB regular
Join Date: Jan 2009
Location: Wales
Posts: 46
There is a circular rubber around the sparkplug that can cause leaks if not replaced properly (It needs to be fitted to the cover) the rubber cover gasket is reusable, but if a small piece of grit has stopped it from sealing? There is an O ring around the circular cam cover that may have split, the problem with finding these leaks is that the wind moves the oil around away from the source, the rocker cover bolts are prone to stripping the threads in the head if someone has been too strong.
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
Wtb Bmw R850r cdnabn49 TRAVEL Bikes for Sale / Wanted 0 14 Mar 2008 05:30
oil leakage from bevel joint mel holmes BMW Tech 18 8 Feb 2005 10:21
nx650 fuel leakage rob46 Honda Tech 4 29 Sep 2003 04:53
Leakage From Head Gasket Ian KTM Tech 4 14 Apr 2003 05:16
oil leakage lost1 KTM Tech 2 17 Mar 2003 11:57


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!

Next HU Eventscalendar

See all events


Latvia to Australia, an inspirational 5 month journey full of unexpected adventures!

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 04:05.