Home arrow Forums



Go Back   XS11.com Forums > Idle Talk Forum > XS11/XJ11 Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 03-07-2012, 06:53 PM
baltimorenick baltimorenick is offline
XSive
 
Join Date: Jun 2009
Location: Baltimore, MD
Posts: 43
Oil warning light

My oil warning light was showing the other day on the highway. It would light up for a little while, then turn off, then light up again with no discernable pattern or cause/effect due to riding conditions (i.e. gear/rpm/speed). Today it hasn't showed up at all. It is worth mentioning at this point that the oil is filled to the proper amount, has a new filter, etc. Is it reasonable to assume that I was getting a warning light due to using 20W40 oil at below 40F temperatures? The oil was simply too viscuous to hit the pressure switch consistently? Since it is much warmer today, the oil reached proper operating temperature and flowed correctly? This is the assumption I am making now. Also, how likely is it that permanent damage occurred while the pressure was too low? Thanks for your input guys.
__________________
---------------
XS1100SF daily rider
XS1100F (parts/project bike)
Reply With Quote
  #2  
Old 03-07-2012, 06:58 PM
bikerphil's Avatar
bikerphil bikerphil is offline
Master of XSology
 
Join Date: Jan 2008
Location: Broward County, S. Flori-DUH
Posts: 7,552
Nine times out of ten, the false warning from the oil light has nothing to do with loss of pressure or a bad sensor. The 79 Special (only) has a "light checker unit" which illuminates the oil light if the tail/brake light bulb burns out. Check the connections on the LCU under the left side cover. Also check your tail/brake light bulb.
__________________



79F - owned since '89 - FJ fork mod, solo seat mod, Dyna 3Ω's, 14MM M/C (168K miles)
79SF - every day rider, solo seat mod, Brembo 16MM M/C, Accel 3Ω's, Supertrapp (125K miles)

"If it ain't broke, modify it"

30 year XS11 owner

Reply With Quote
  #3  
Old 03-07-2012, 09:35 PM
motoman motoman is offline
Master of XSology
 
Join Date: Aug 2005
Location: Grand Junction, Colorado
Posts: 8,309
Wink

Quote:
Originally Posted by baltimorenick View Post
My oil warning light was showing the other day on the highway. It would light up for a little while, then turn off, then light up again with no discernable pattern or cause/effect due to riding conditions (i.e. gear/rpm/speed). Today it hasn't showed up at all. It is worth mentioning at this point that the oil is filled to the proper amount, has a new filter, etc. Is it reasonable to assume that I was getting a warning light due to using 20W40 oil at below 40F temperatures? The oil was simply too viscuous to hit the pressure switch consistently? Since it is much warmer today, the oil reached proper operating temperature and flowed correctly? This is the assumption I am making now. Also, how likely is it that permanent damage occurred while the pressure was too low? Thanks for your input guys.
What bikerphil stated would be a good start. Don't think viscosity has anything to do with it. Heck, 30yrs. ago before I had a garage, used to cover mine with blankets with a heat lamp under it. At -20 to-25degrees sometimes it would start and sometimes not. Either way still run 20-50w and was never an issue, cept for the occassional slow turning over. Now knowing what I do, Im sure the petcock diaphrams were too cold to react to any vacuum created while cranking. Likely would of started more regularly if I'd flipped them to prime. IMO, once running and warmed up, outside temp has no effect on viscosity as that motor IS hot, even when outside temps are colder.
__________________
81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.
Reply With Quote
  #4  
Old 03-07-2012, 09:51 PM
ddragon63's Avatar
ddragon63 ddragon63 is offline
XS-XJ Guru
 
Join Date: Jan 2012
Location: Ridgefield, WA
Posts: 1,101
I rode mine to work yesterday. it was 33 outside and I run 20w-50 with 10oz of Lucas stabilizer in it... I've never had that problem. check the connection on your pressure sensor too along with the LCU. I had to remove my LCU to make all my lights work the way I wanted on mine so the oil switch is the only circuit on that bulb, I've fired my bike below freezing in the garage many times and the light goes off as soon as the bike fires up even with the thick mix I run. So I don't think its your viscosity...
__________________
Don
1979 XS1100SF "Old Man" bought by my Dad brand new in 79, customized in 80 with Vetter, Standard tank, and touring seat. I inherited in 02 when Dad passed. Been riding it since 09. No resto, bike is a survivor...

2007 RoadStar 1700 Midnight Silverado "The Black Pearl" Cobra Slash-downs, K&N filter. More mods to come


old:
1989 kawi ex500
1996 yzf-r6
1999 yzf-r1
2001 kawi zx-6r
2000 Ducati 748
2002 YZF-R1
2005 V-Star 1100 Classic
Reply With Quote
  #5  
Old 03-07-2012, 11:24 PM
baltimorenick baltimorenick is offline
XSive
 
Join Date: Jun 2009
Location: Baltimore, MD
Posts: 43
Thanks for the good info guys. Both filaments of the tail/brake light are working so there must be a crappy connection somewhere. I will wiggle some connectors around tomorrow to see if I can get the idiot light to come on again. Also, I just want to say that this forum is great!
__________________
---------------
XS1100SF daily rider
XS1100F (parts/project bike)
Reply With Quote
  #6  
Old 03-08-2012, 05:54 AM
jetmechmarty's Avatar
jetmechmarty jetmechmarty is offline
Master of XSology
 
Join Date: Nov 2003
Location: Coldwater, Mississippi
Posts: 7,254
In recent months I had to fix poor tail light connections on two XS bikes. It isn't uncommon, apparently.
__________________
Marty (in Mississippi)
XS1100SG
XS650SK
Reply With Quote
  #7  
Old 03-08-2012, 08:01 AM
bikerphil's Avatar
bikerphil bikerphil is offline
Master of XSology
 
Join Date: Jan 2008
Location: Broward County, S. Flori-DUH
Posts: 7,552
With the bike running in neutral, try twisting the loom that goes into the LCU itself and look to see if the light flickers. That's how I fixed mine 6 yrs. ago, just twisted the wires and it is working correctly to this day. YMMV
If you want to bypass the unit altogether for further testing, just unplug it and jump the blu and blu/yel terminals in the harness connector.

Here's what the LCU looks like...

__________________



79F - owned since '89 - FJ fork mod, solo seat mod, Dyna 3Ω's, 14MM M/C (168K miles)
79SF - every day rider, solo seat mod, Brembo 16MM M/C, Accel 3Ω's, Supertrapp (125K miles)

"If it ain't broke, modify it"

30 year XS11 owner


Last edited by bikerphil; 03-08-2012 at 08:06 AM.
Reply With Quote
  #8  
Old 03-09-2012, 01:43 PM
Jerry's Avatar
Jerry Jerry is offline
XS & TRUE XJ GURU
 
Join Date: Jun 2002
Location: Elma, IA.
Posts: 2,998
I had a similar problem with a Yamaha 400. Cleaned the top of the sensor and that fixed it. So much dirt/garbage on it the signal was 'bleeding" between the contacts, giving a false reading.
__________________
Jerry Fields
'82 XJ 'Sojourn'
'06 Concours
My Galleries Page.
My Blog Page.
"... life is just a honky-tonk show." Cherry Poppin' Daddy Strut
Reply With Quote
  #9  
Old 03-11-2012, 01:31 PM
airborneXS's Avatar
airborneXS airborneXS is offline
XStremely XSive
 
Join Date: Feb 2012
Location: Houston, TX.
Posts: 338
mine does the smae thing...ive learned to just ignore the light all together...
__________________
79 XS11 special "Loki" - homemade 4-2 exhaust, pod filters, rebuilt forks with progressive springs, tkat fork brace, progressive shocks, rebuilt all brakes and MC's, rebuilt carbs with #142.5 main and #42.5 pilot, a custom front and chin fairing, and a handmade set of saddlebags....

09 YZF-R1 " Toothless"

04 Buell XB12R "Butterfly"

"I had a name at some point, a birth-name, but now everyone just calls me Wolf...."

Wolf
Moto Militia MC
Reply With Quote
  #10  
Old 03-11-2012, 01:47 PM
BA80's Avatar
BA80 BA80 is offline
Doctor of XSology
 
Join Date: Oct 2010
Location: Tulsa, Ok
Posts: 9,861
Quote:
Originally Posted by airborneXS View Post
mine does the smae thing...ive learned to just ignore the light all together...
I hear what your sayin' Wolf Man but you might want to fix that because if that oil light is working right it just might save your engine some day. IMO
__________________
Greg

Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

― Albert Einstein

80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

The list changes.
Reply With Quote
  #11  
Old 03-11-2012, 04:24 PM
natemoen's Avatar
natemoen natemoen is offline
Master of XSology
 
Join Date: May 2010
Location: Fargo
Posts: 8,624
Quote:
Originally Posted by BA80 View Post
I hear what your sayin' Wolf Man but you might want to fix that because if that oil light is working right it just might save your engine some day. IMO
+1, That light serves a real purpose other than that stupid burnt out light warning.
__________________
Nathan
KD9ARL

μολὼν λαβέ

1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters

Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner

In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

Theodore Roosevelt
Reply With Quote
  #12  
Old 09-04-2012, 08:26 PM
conquest87tsi conquest87tsi is offline
Truly XSive
 
Join Date: Jun 2012
Location: Jackson, Minn.
Posts: 190
Light

I need some clarification,
So what exactly is jumping the blue and blue yellow wire do? With the LCU disconnected, well the oil pressure switch still illuminate the light?

The reason I am confused is that everyone says to remove the LCU and jump the blue wires. Well my light is off with them removed anyway.
__________________
1979 XS1100 SF
1979 XS750 SF

Previous Rides:
1981 KZ650CSR
2006 VTX 1300C
1986 Radian 600
Reply With Quote
  #13  
Old 09-04-2012, 08:37 PM
bikerphil's Avatar
bikerphil bikerphil is offline
Master of XSology
 
Join Date: Jan 2008
Location: Broward County, S. Flori-DUH
Posts: 7,552
When you bypass the LCU, the oil light will not illuminate if you have a burned out tail light bulb, but it will still function normally when there is no oil pressure at the engine sensor. These units commonly fail so your options would be to try to twist/wiggle the wires coming from the unit to see if that corrects the problem, or, replace the unit, or, bypass the unit. To test, the oil light should come on with the key on, but turn off when the engine starts.
__________________



79F - owned since '89 - FJ fork mod, solo seat mod, Dyna 3Ω's, 14MM M/C (168K miles)
79SF - every day rider, solo seat mod, Brembo 16MM M/C, Accel 3Ω's, Supertrapp (125K miles)

"If it ain't broke, modify it"

30 year XS11 owner

Reply With Quote
  #14  
Old 09-04-2012, 09:50 PM
conquest87tsi conquest87tsi is offline
Truly XSive
 
Join Date: Jun 2012
Location: Jackson, Minn.
Posts: 190
Lcu

Ok,
So as I stated before, the problem started when I installed LED tail lights. However, I just noticed that when I replaced my starter cover the pressure sender wire was pinched a bit. I removed the connector to see if the light would stay off, and it did, but why moving it around the light would blink, shorting somewhere.

I had an extra wire from my parts bike and threw it on. (Not exactly that easy without removing the carbs). Now the light turns off with the bike running and the LCU removed.

So, must the LCU be hooked up for the Pressure switch to work? OR Do I just have to jump the blue wires and not use the LCU? I'm just not sure what everyone means by "bypassing" it.

With the LCU removed, the pressure switch will not work unless the blue wires are jumped? Is that correct? If so, why does the OIL light come on when the pressure switch wire is connected, and doesn't when it isn't?

It seems to be working regardless of the LCU. Or isn't it actually checking it?
__________________
1979 XS1100 SF
1979 XS750 SF

Previous Rides:
1981 KZ650CSR
2006 VTX 1300C
1986 Radian 600
Reply With Quote
  #15  
Old 09-04-2012, 09:52 PM
conquest87tsi conquest87tsi is offline
Truly XSive
 
Join Date: Jun 2012
Location: Jackson, Minn.
Posts: 190
Lcu

Just to clarify, I DO want to bypass the LCU. Those LED's will probably outlive me anyway.
__________________
1979 XS1100 SF
1979 XS750 SF

Previous Rides:
1981 KZ650CSR
2006 VTX 1300C
1986 Radian 600
Reply With Quote
Reply

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
Forum Jump


All times are GMT -6. The time now is 04:42 PM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Integrated by BBpixel ©2004-2022, jvbPlugin