Petcock operation
08-05-2008, 08:05 AM
#1
Junior Member
Squid
Thread Starter
Join Date: Aug 2008
Posts: 2
Petcock operation
I am new to the list. I have a 1998 VTR I am trying to get running. Looking for some help. The petcock appears to be a vacuum type with two positions:
Also, there are two nipples on the pectcock that appear to be for vacuum lines. This there a difference in the function of each? If so, what.
Finally, my front cyclinder filled up completely with gas whiched leaked into the crankcase. Any idea on wheather this is a petcock issue or float needle?
- Full on (like a prime mode)
- Vacuum operated (supplies gas only when vacuum is created.)
Also, there are two nipples on the pectcock that appear to be for vacuum lines. This there a difference in the function of each? If so, what.
Finally, my front cyclinder filled up completely with gas whiched leaked into the crankcase. Any idea on wheather this is a petcock issue or float needle?
08-05-2008, 08:13 AM
#2
Will drum for BBQ
Back Marker
Join Date: Jul 2008
Location: Kentucky
Posts: 166
See this link:
https://www.superhawkforum.com/forum...hlight=petcock
In a perfect world the needle would stop any fuel overflow into the cylinder. Having the petcock working correctly helps when the world is non-perfect.
https://www.superhawkforum.com/forum...hlight=petcock
In a perfect world the needle would stop any fuel overflow into the cylinder. Having the petcock working correctly helps when the world is non-perfect.
08-05-2008, 08:13 AM
#3
Senior Member
SuperBike
Join Date: Jul 2004
Posts: 1,015
The side nipple it the one you want to use, the lower nipple has no function.
Yes you have the petcock operation correct. Engine must be running for it to operate or flow fuel.
If you have fuel in the front cylinder then you may have multiple issues. The float may be sticking in the front carb letting fuel flow and you may have some type of petcock shut off issue.
Yes you have the petcock operation correct. Engine must be running for it to operate or flow fuel.
If you have fuel in the front cylinder then you may have multiple issues. The float may be sticking in the front carb letting fuel flow and you may have some type of petcock shut off issue.
08-05-2008, 04:21 PM
#4
Senior Member
SuperSport
Join Date: Jul 2008
Location: Twin Cities
Posts: 505
I had mine apart recently and I'm pretty sure the two modes are vacuum operated or completely off. I removed the diaphram and stopper inside due to a large hole in the diaphram and I can still shut it off with the **** on the front.
08-05-2008, 06:43 PM
#6
Senior Member
SuperBike
Join Date: Jul 2004
Posts: 1,015
08-15-2008, 02:01 PM
#8
Uhhhhh..huh.huh..Member..
Superstock
Join Date: Apr 2008
Location: Vancouver, WA
Posts: 269
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