ADVrider

Go Back   ADVrider > Bikes > GSpot > Parallel Universe
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-29-2012, 04:26 PM   #1
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
What's missing?? 800GS Fuel Pump



I am of course speaking of this empty threaded hole on top of the pump here. My 800 is skipping when fuel gets around 1/3 of a tank. Pulled the pump to find that empty threaded hole...????
Girthy Knobkers is offline   Reply With Quote
Old 11-29-2012, 06:49 PM   #2
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
I have also dug around the tank trying to find the culprit but no luck... I know that suggestion will come up
Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 07:05 AM   #3
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,206
Hmmmmmmmmmmmmm
Sorry I have some pictures of the fuel pump assby. scavenged from other threads, but none show close-up of that area... I don't what it is...
JRWooden is offline   Reply With Quote
Old 11-30-2012, 10:01 AM   #4
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
From what I gather it is some sort of spring/valve contraption. I tried to scavenge a similar part off an old RT pump but they are two dif pieces. The only way to get that is to order a whole new pump!
Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 11:23 AM   #5
njoytheride
NJOYN' THE JOURNEY
 
Joined: Jan 2008
Location: WESTERN AR
Oddometer: 900
I purchased the after market pump off of Ebay. I will look tonight and see if it has something located in that area. I took pictures of the OEM pump assembly when I was checking the filer but no pictures showed the top of the pump.
njoytheride is offline   Reply With Quote
Old 11-30-2012, 11:29 AM   #6
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
Thanks, I understand that BMW is really good at manufacturing a part that works on many bikes and that hole might be something that on another bike has something in it but the 800 never did. Knowing would help eliminate the reasons for this skipping at 1/3 of a tank or lower...
Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 11:53 AM   #7
docsherlock
Gnarly Adventurer
 
docsherlock's Avatar
 
Joined: Mar 2009
Location: BC, sometimes
Oddometer: 462
Quote:
Originally Posted by Girthy Knobkers View Post
Thanks, I understand that BMW is really good at manufacturing a part that works on many bikes and that hole might be something that on another bike has something in it but the 800 never did. Knowing would help eliminate the reasons for this skipping at 1/3 of a tank or lower...
Your pump is probably overheating as the fuel level drops; the fuel is also used for cooling the pump. Many references to this symptom and cause on the forums.

If there was nothing in the tank, I doubt your pump is missing anything.
docsherlock is online now   Reply With Quote
Old 11-30-2012, 11:58 AM   #8
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
So replacing the pump is the only option? what is causing it to over heat?
Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 11:58 AM   #9
ebrabaek
Beastly Adventurer
 
Joined: Jan 2010
Location: Grand Valley, Colorado
Oddometer: 4,673
How did your fuel filter look....????? I live in the desert, with over 100 deg. on a regular basis, No issues after 12000 miles with running the tank down. It would make sense to me that if your filter had a partial blockage, then as fuel level dropped to 1/3 pump has to siphon too much, and fuel starvation occurs....imho.
__________________


Erling
ebrabaek is offline   Reply With Quote
Old 11-30-2012, 11:59 AM   #10
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
I back flushed it and a lot of gray gas came out, now I am beginning to flush it forward and the gas looks even worse... going to keep flushing...
Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 12:11 PM   #11
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,206
GK:

While you have that filter on the bench would you mind capturing the dimensions of it?

Diameter & height, and length and diameter of nipples?

The local NAPA parts store manager is a buddy of mine maybe he can reverse engineer something that would work...
Its a frigg'n FI-rated fuel filter damn pity that BMW won't sell us one separately..........
JRWooden is offline   Reply With Quote
Old 11-30-2012, 12:26 PM   #12
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419




Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 03:02 PM   #13
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,206
Thanks!
JRWooden is offline   Reply With Quote
Old 11-30-2012, 03:28 PM   #14
Girthy Knobkers OP
Gnarly Adventurer
 
Girthy Knobkers's Avatar
 
Joined: May 2012
Location: East Bay
Oddometer: 419
let me know, I got a look at an oem replacement and it seems nothing goes in that hole that I was curious about. The pump over heating makes sense as well as the fuel filter being dirty. If there is a filter that can be wedged in there that would be sweet
Girthy Knobkers is offline   Reply With Quote
Old 11-30-2012, 07:39 PM   #15
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,206
Will do, I'm not real optimistic, but we could get lucky....
That would be nice............
JRWooden is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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 On

Forum Jump


Times are GMT -7.   It's 04:12 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014