Home arrow Forums



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

Reply
 
Thread Tools Display Modes
  #1  
Old 08-12-2017, 08:23 PM
neJeff's Avatar
neJeff neJeff is offline
XStremely XSive
 
Join Date: Jun 2011
Location: Nebraska
Posts: 321
Whats today's Petcock answer...

Two sets of petcock(s) are no good

Is this one the answer then http://www.ebay.com/itm/Yamaha-Petco...RZAfqm&vxp=mtr

I hear lots of mixed results on rebuild kits. What's the biggest failure points on these things? Can you run just ONE petcock? Is there enough fuel flow?

Thanks
__________________
Current Daily Rides / Projects

1979 Yamaha XS1100F (since 2015)...Project
1980 Suzuki GS850G (since 2012)
1979 Kawasaki KZ400B (since 2013)
Reply With Quote
  #2  
Old 08-12-2017, 08:48 PM
skids's Avatar
skids skids is offline
XS-XJ Super Guru
 
Join Date: Jul 2002
Location: Florissant, CO, USA
Posts: 4,416
Well, i went to the link. It lists the 1978 xs1100 (standard only) and it also lists other years specials. I can tell you that there is an apparent mistake with applicability. The standard and special petcocks are very different with both size and function. Get more explanation before ordering!!!
__________________
Skids (Sid Hansen)

Down to two 1978 E's. Both stock air boxes with K&N filters, one with 81H pipes and carbs,
One with Jardine 4-1 pipes. 8500 feet elevation.
03 Honda ST1300 ABS
Reply With Quote
  #3  
Old 08-12-2017, 09:31 PM
Schming's Avatar
Schming Schming is offline
XS-XJ Guru
 
Join Date: Jul 2009
Location: Pittsburgh,PA
Posts: 1,622
time for a rebuid

Here's how to successfully rebuild the petcocks:

http://xjbikes.com/forums/threads/re...-w-pics.25058/

Edit: damb no pics
__________________
1980 XS1100G "Street Queen" (in resto ATM)
1979 XS1100SF (stock-slight mods planned)
1984 XV700L Virago (to be hot-modded)
1983 XJ750MK Midnight Maxim (semi-restored DD)
1977 XS650D (under a tarp, in a yard, next to the washing machine find, patiently awaiting resto)

"...there's no pride in turning the key to your brand new 15,000 dollar bike."

Sometimes it takes a whole tank of gas before you can think straight.

Last edited by Schming; 08-12-2017 at 09:35 PM.
Reply With Quote
  #4  
Old 08-12-2017, 10:39 PM
Rasputin's Avatar
Rasputin Rasputin is offline
XS-XJ Super Guru
 
Join Date: Apr 2008
Location: Lacombe, Alberta, Canada
Posts: 3,087
Rebuild kits are great

I first rebuilt a petcock on my 1970 HS-1 90cc twin In 1971. All I have ever had to do was clean up the parts and install the new kit.
I have had as many as 11...XS11's at a time and never had an issue with a rebuilt petcock. Some of them were in dire need of help, but nothing that a thorough cleaning would not fix. Many on here give up and switch to the peoples choice at the moment.
The surfaces of the petcock really have little to do with anything as long as they are not abrasive. The rubber will last only so long, no matter what you do. Enough turns on the dial "on/off" will wear out any rubber component, or the rubber will age.
The one thing to be certain of on these bikes is that the snout and O-ring are correct for your bikes vacuum requirements. Many manufacturers have a wiggle room built in.
The most common mistake with the fuel valves is the position of the petcock handle. I would bet that over 50% of the new owners do not know the correct way to do it.
__________________
2-79 XS1100 SF
2-78 XS1100 E Best bike Ever
80 XS 1100 SG Big bore kit but not fully running yet.
Couple of more parts bikes of which 2 more will live!
Reply With Quote
  #5  
Old 08-13-2017, 06:26 AM
jetmechmarty's Avatar
jetmechmarty jetmechmarty is offline
Master of XSology
 
Join Date: Nov 2003
Location: Dahlonega, Georgia
Posts: 6,802
If the kit is available OEM, that's what you want. Aftermarket kits for these things are iffy at best.
__________________
Marty (in Georgia)
XS1100SG
XS650SK
Reply With Quote
  #6  
Old 08-13-2017, 07:35 AM
3Phase's Avatar
3Phase 3Phase is offline
XS-XJ Super Guru
 
Join Date: May 2008
Location: Simi Valley, CA
Posts: 4,940
Quote:
Originally Posted by Schming View Post
Here's how to successfully rebuild the petcocks:

http://xjbikes.com/forums/threads/re...-w-pics.25058/

Edit: damb no pics
There's a lot of good information in that thread. It doesn't solve the Photobucket problem but in one of the last posts, XJBikes member Ian Vanore made a really good PDF with all of the text and pictures and put it on his Google Drive:-

XJBikes.com > Forums >XJ Motorcycle Forums > XJ DIY How-To Instructions >
Rebuilding the Yamaha Vacuum Fuel Valve w/pics
Discussion in 'XJ DIY How-To Instructions' started by bigfitz52, May 9, 2010. page-4#post-566329
__________________
-- Scott
_____

1982 XJ1100J: "Baby" SS Brakes, '850 FD, ACCT
1980 XS1100G: "Columbo" SS Brakes, '850 FD, ACCT
1979 XS1100SF: "Bush" W.I.P.
Reply With Quote
  #7  
Old 08-13-2017, 07:43 AM
jetmechmarty's Avatar
jetmechmarty jetmechmarty is offline
Master of XSology
 
Join Date: Nov 2003
Location: Dahlonega, Georgia
Posts: 6,802
Quote:
Originally Posted by 3Phase View Post
There's a lot of good information in that thread. It doesn't solve the Photobucket problem but in one of the last posts, XJBikes member Ian Vanore made a really good PDF with all of the text and pictures and put it on his Google Drive:-

XJBikes.com > Forums >XJ Motorcycle Forums > XJ DIY How-To Instructions >
Rebuilding the Yamaha Vacuum Fuel Valve w/pics
Discussion in 'XJ DIY How-To Instructions' started by bigfitz52, May 9, 2010. page-4#post-566329
The nice thing is you may download that pdf.
__________________
Marty (in Georgia)
XS1100SG
XS650SK
Reply With Quote
  #8  
Old 08-13-2017, 06:18 PM
bikerphil's Avatar
bikerphil bikerphil is offline
Master of XSology
 
Join Date: Jan 2008
Location: Broward County, S. Florida
Posts: 7,145
Quote:
Originally Posted by neJeff View Post
Can you run just ONE petcock?
Yes you can with no fuel starvation problems, run a line with one filter into a T, then down to the 2 carb inlets.
__________________



79F - owned since '89 - FJ fork mod, solo seat mod, Dyna 3Ω's, Kerker, 14MM M/C (148K miles)
79SF - every day rider, solo seat mod, Brembo 16MM M/C, Accel 3Ω's, Supertrapp (115K miles)

"If it ain't broke, modify it"

25+ year XS11 owner

Reply With Quote
  #9  
Old 08-14-2017, 03:29 PM
neJeff's Avatar
neJeff neJeff is offline
XStremely XSive
 
Join Date: Jun 2011
Location: Nebraska
Posts: 321
Quote:
Originally Posted by bikerphil View Post
Yes you can with no fuel starvation problems, run a line with one filter into a T, then down to the 2 carb inlets.
Well I have four petcocks to work with so I'll start disassembling cleaning, etc and see if I can get a good pair of parts together and order some rubber bits and make this thing work. If not two then one will do. Very complete writeup that guy did!
__________________
Current Daily Rides / Projects

1979 Yamaha XS1100F (since 2015)...Project
1980 Suzuki GS850G (since 2012)
1979 Kawasaki KZ400B (since 2013)
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 11:25 PM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Integrated by BBpixel ©2004-2017, jvbPlugin