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Who's running Yamaha TW200 gas petcock???
I just bought one but it's a 1/4" outlet and of course the Vulcan inlets are 5/16". What up?
"Giving the Ralph to the prairie scrub of Grand Forks is like dressing up drunken monkeys in snowmobile jackets and packing them into the Ordway....."
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What's up?
It's for Yamaha.... The Vulcan is a Kawasaki.....
It's for Yamaha.... The Vulcan is a Kawasaki.....
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I think this is the same petcock discussed on another thread from a year or two ago. One post indicated that the 750 starved for fuel from it at highway speeds.
It seems obvious to me that a petcock with single 1/4" outlet designed for a 200 cc engine will not supply enough fuel for the 750 cc Vulcan which has two 5/16" fuel lines.
It seems obvious to me that a petcock with single 1/4" outlet designed for a 200 cc engine will not supply enough fuel for the 750 cc Vulcan which has two 5/16" fuel lines.

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)
H-D windshield
Relocated R/R
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July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15
TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
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Last edited by OlHossCanada; 05-06-2012 at 09:11 PM.
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Quote:
Originally Posted by OlHossCanada
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It seems obvious to me that a petcock with single 1/4" outlet designed for a 200 cc engine will not supply enough fuel for the 750 cc Vulcan which has two 5/16" fuel lines.
"Giving the Ralph to the prairie scrub of Grand Forks is like dressing up drunken monkeys in snowmobile jackets and packing them into the Ordway....."
Quote:
Originally Posted by RxRC
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I don't think so. Wasn't there one member that said it worked fine? I believe there was. That would mean the person having the "gas starving" had another problem. Clogged vent, dirty carbs, bad coil, etc. I mean who knows with these things, they have such a myriad of problems.
1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R
1990 Kawasaki Vulcan 750
1998 Honda VFR800 FI
2014 Honda VFR800F
1989 Pontiac Firebird Formula 350
Quote:
Originally Posted by thtanner
View Post
The TW200 petcock does not allow as much gas flow as the VN750 petcock, so it is probably inadequate.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Quote:
Originally Posted by thtanner
View Post
The TW200 petcock does not allow as much gas flow as the VN750 petcock, so it is probably inadequate.
You're saying that if you opened the cap, removed the fuel lines and watched the tank drain that your 750 could burn gas that quickly under normal riding conditions? We're not talking about a big block Chevy here. These Vulcans are gas sippers.
"Giving the Ralph to the prairie scrub of Grand Forks is like dressing up drunken monkeys in snowmobile jackets and packing them into the Ordway....."
Quote:
Originally Posted by RxRC
View Post
Not necessarily.
You're saying that if you opened the cap, removed the fuel lines and watched the tank drain that your 750 could burn gas that quickly under normal riding conditions? We're not talking about a big block Chevy here. These Vulcans are gas sippers.
You're saying that if you opened the cap, removed the fuel lines and watched the tank drain that your 750 could burn gas that quickly under normal riding conditions? We're not talking about a big block Chevy here. These Vulcans are gas sippers.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R
1990 Kawasaki Vulcan 750
1998 Honda VFR800 FI
2014 Honda VFR800F
1989 Pontiac Firebird Formula 350
I'd love to then maybe we can have a definitive answer. My original petcock doesn't leak or anything but the in tank screens are both ripped. Plus I've never been a big fan of vacuum operated valves. You know that's something prevalent on bikes imported to the USA only.
I'm not really concerned with flow, the reason I started the thread is the problem of having to go to from a 1/4" line to a 5/16". I'm surprised this wasn't mentioned in any other threads.
I went to my local parts store and they had nothing. I'd like a barbed, brass connector that steps from 5/16" to 1/4".
Any direction or link would be appreciated.
I'm not really concerned with flow, the reason I started the thread is the problem of having to go to from a 1/4" line to a 5/16". I'm surprised this wasn't mentioned in any other threads.
I went to my local parts store and they had nothing. I'd like a barbed, brass connector that steps from 5/16" to 1/4".
Any direction or link would be appreciated.
"Giving the Ralph to the prairie scrub of Grand Forks is like dressing up drunken monkeys in snowmobile jackets and packing them into the Ordway....."
5/16" to 1/4" is very close, and 1/4"ID hose will fit snugly over 5/16" fittings. I'd guess you need a 1/4" ID "T" fitting.
1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R
1990 Kawasaki Vulcan 750
1998 Honda VFR800 FI
2014 Honda VFR800F
1989 Pontiac Firebird Formula 350
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