Valkyrie Riders Cruiser Club
August 21, 2025, 05:07:47 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
Ultimate Seats Link VRCC Store
Homepage : Photostash : JustPics : Shoptalk : Old Tech Archive : Classifieds : Contact Staff
News: If you're new to this message board, read THIS!
 
MarkT Exhaust
Valkyrie Riders Cruiser Club > General > 1500 Tech Board > Question on Rebuilding Petcock
Pages: [1]   Go Down
« previous next »
Send this topic Print
Author Topic: Question on Rebuilding Petcock  (Read 1175 times)
vic
Member
*****
Posts: 57

East TN
« on: January 30, 2012, 01:31:52 PM »
I changed the vacuum hoses on my '98 Tourer today and decided to rebuild the petcock since I've been having some instances that seemed like fuel starvation.  Took apart the petcock and found a couple of tiny tears in the old diaphram.  Got it back together and remembered reading here that you have to test the petcock by drawing a vacuum on it to make sure it works.  So I attached a vacuum hose to the petcock and tried to draw a vacuum by mouth.  A few drops of fuel slowly dribbled out after a few tries.   

My question is, how much fuel is supposed to come out when you're sucking on the vacuum hose till almost blue in the face?  Is a few drops good, or is it supposed to stream out?  Thanks for any answers.
Logged
Ricky-D
Member
*****
Posts: 5031


South Carolina midlands
« Reply #1 on: January 30, 2012, 01:41:05 PM »
The gasoline should stream out.

Might be it's back together incorrectly but I would check to be sure you have gas in the tank first.

***
Logged
2000_Valkyrie_Interstate
vic
Member
*****
Posts: 57

East TN
« Reply #2 on: January 30, 2012, 01:48:11 PM »
I've got about 2 gallons of gas in the tank.  The tank is an I/S tank that I installed on my Tourer a few years ago.  I've got a diagram of the sequence of the petcock parts and took it apart and put it back together  a few times just to make sure its in the right order.  If fuel is supposed to stream out, then I guess its back to the drawing board!
Logged
Bone
Member
*****
Posts: 1596
« Reply #3 on: January 30, 2012, 01:55:20 PM »
Did you turn the petcock lever to the on position ?
Logged
vic
Member
*****
Posts: 57

East TN
« Reply #4 on: January 30, 2012, 02:10:18 PM »
I turned the petcock to On and to Reserve and got a few drops each time.
Logged
N8171S
Member
*****
Posts: 184

Marlboro, Mass
« Reply #5 on: January 30, 2012, 04:04:10 PM »
I made an aluminum plate and gasket and converted  both my valks to manual valves with Dan Marc electric shutoffs.  No vacuum lines.  Remember with a bad diaphragm fuel can leak into # 6 carb and cause a possible hydro.
Logged
Blackduck
Member
*****
Posts: 642


West Australia
« Reply #6 on: January 30, 2012, 04:16:23 PM »
For fuel to reach #6 cylinder via the vacuum hose you need 3 faults,
2 torn diaphragms and a plugged weep hole as well as the petcock being in the on or reserve position. Not impossible but very unlikely.
Logged
2001 Standard, 78 Goldwing, VRCC 21411
MP
Member
*****
Posts: 5532


1997 Std Valkyrie and 2001 red/blk I/S w/sidecar

North Dakota
« Reply #7 on: January 30, 2012, 04:25:46 PM »
I have done that, draw a vac by mouth.  You should get a nice stream.

MP
Logged

"Ridin' with Cycho"
BonS
Member
*****
Posts: 2198


Blue Springs, MO


WWW
« Reply #8 on: January 31, 2012, 03:11:19 PM »
This thread is about modifying the petcock but has some great diagrams and photos that may help:
http://www.valkyrieforum.com/bbs/index.php/topic,37577.0.html
Logged
Pages: [1]   Go Up
Send this topic Print
« previous next »
Jump to:  

Theme by Crip Powered by SMF 1.1.20 | SMF © 2013, Simple Machines MySQL | PHP | XHTML | CSS