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!

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 20 May 2006
Registered Users
HUBB regular
 
Join Date: Jan 2005
Posts: 42
Right Cylinder Running Hot + Backfire 1100GS

1998 R1100GS

Right cylinder seems to be running hotter than left. I've noticed this when riding in sandals (Yes - I know!). My right foot gets REALLY hot. Seems to be a bit more heat discolouration around the RH intake too. Riding in boots I don't notice.

Also, the engine is backfiring a bit on the overrun. It may be the crappy Nepali/Indian petrol I'm using. I'm presently up into the Himalayan foot-hills too.

Otherwise - it's running well. Did valve clearances and synchro'ed TBs so it goes very well. Plugs are in good nick and the right colour. Oil is fine and running at normal temp on the gauge. Throttle cables properly seated.

Is this heat problem normal? Is it related to the backfiring? Is there nothing to worry about?
Reply With Quote
  #2  
Old 22 May 2006
Contributing Member
Veteran HUBBer
 
Join Date: Apr 2003
Location: Gloucester, England
Posts: 431
Lightbulb

Can't comment on the misfire, but if you look carefully you'll see that the right cylinder's further back than the left due to the crank journal arrangement. This is what's causing toasted toes, nothing sinister (haha).

Regards, Mick
Reply With Quote
  #3  
Old 22 May 2006
Registered Users
HUBB regular
 
Join Date: Jul 2003
Location: almere,holland
Posts: 52
hello,

I've had lots of backfires while riding in central america, I mostly noted it at altitude. I blame it on crappy/ low octane fuel. the moment good grade fuel was avaiable, the misfires were gone.
have a good trip,
MARK
Reply With Quote
  #4  
Old 22 May 2006
Registered Users
HUBB regular
 
Join Date: Jan 2005
Posts: 42
Thanks People.

Yeah - had noticed the right cylinder is further back. It's still hotter though. The engine bar on RH side is way hotter than left side.

Take the point about the poor petrol. Only seems to have been backfiring since did valves/ TB synching. Got them spot on so don't know why it should be so.

Also - took fuel tank off and it's possible I may have re-connected fuel lines wrongly. Would this cause backfires - if wrong amount of fuel going to each side?
Reply With Quote
  #5  
Old 23 May 2006
Gold Member
Veteran HUBBer
 
Join Date: Oct 2004
Location: Germany
Posts: 239
Hey Buzz,

I told you the backfiring is not normal

Check if there is air getting into the system through or besides the rubber collar between the injection pump and the cylinder. I had it a couple of times so far when my old collars wear out.

Do it soon, otherwise you will risk a piston seizure, I was told.

You can have a spare collar from me if it fits.

Regards

Lars
Reply With Quote
  #6  
Old 24 May 2006
Registered Users
HUBB regular
 
Join Date: Jan 2005
Posts: 42
I'll look into it Lars. ta.
Reply With Quote
  #7  
Old 24 May 2006
Registered Users
HUBB regular
 
Join Date: Jan 2005
Posts: 42
Rubber collar was loose so tightened the fixer. Seems to have improved things.

Well done Lars. But tell me, why didn't you suggest this when you were actually SITTING on the back of my bike 2 weeks ago and commenting in your precise teutonic tones on the unpleasant backfiring that was spoiling your pillion ride as you flirted with the local Nepali girls?

Explain that one.
Reply With Quote
  #8  
Old 30 May 2006
Registered Users
HUBB regular
 
Join Date: Jan 2005
Posts: 42
Well, problem got worse and worse but now it's SORTED.

The rubber collar on RH intake was loose. When I synched the TBs it must have been a bit loose so although got the synching correct - there was too much air coming in on RH side.

When I tightened up the collar - synching was way off again. Borrowed some vacuum gauges and got it spot on now.

No more backfires - runs perfect.
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
xt600 cylinder mph4 Yamaha Tech 3 25 Nov 2005 20:03
1100GS Clutch sigoodacre BMW Tech 11 15 Nov 2004 19:00
Dommie cylinder head mikechips Honda Tech 2 13 Oct 2003 14:22
R100GS running rough harvey BMW Tech 6 18 Apr 2002 21:27
1100gs backfire with Laser exhaust??? bigpatty BMW Tech 1 22 Aug 2001 21:37

 
 
 

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

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 17:58.