Vacuum cap size for carb vacuum\petcock port? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 04-13-2016, 04:08 PM Thread Starter
Senior Member
 
Join Date: Mar 2016
Location: MI
Posts: 292
iTrader: (0)
 
Vacuum cap size for carb vacuum\petcock port?

I realize the vaccum port to petcock would be metric. But I need to plug it with a sae size plug for tw200 conversion.
Are you guys using 5/16? 1/4? different? My eyeball guesstimates aren't that great, and I don't have access to carb for a few days.
gidaeon is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 04-13-2016, 07:27 PM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,786
iTrader: (4)
     
Garage
Fuel hoses are 5/16 ID.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is online now  
post #3 of 11 (permalink) Old 04-13-2016, 07:38 PM
Senior Member
 
calebj's Avatar
 
Join Date: Sep 2015
Location: Roanoke, VA
Posts: 499
iTrader: (0)
 
Garage
Quote:
Originally Posted by Knifemaker View Post
Fuel hoses are 5/16 ID.
He's asking about the vacuum cap. I think I have one in the garage, I'll try to find it and confirm.
calebj is offline  
 
post #4 of 11 (permalink) Old 04-13-2016, 07:46 PM
..have a vulcan good day!
 
WilliamTech's Avatar
 
Join Date: May 2011
Location: Pensacola, FL.
Posts: 4,508
iTrader: (17)
   
Quote:
Originally Posted by Knifemaker View Post
Fuel hoses are 5/16 ID.
I utilize clear Line purchased off Reels from True Value Hardware store.
EDIT: This is not Fish Tank Air Line/Hose !
Clear is nice for fuel flow observation (when-ever needed).
..... is flexible for routing...stretches over nipples, No clamps required

Clear Fuel Line 3/16 Vacuum Line

enjoy

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!

Last edited by WilliamTech; 04-14-2016 at 05:10 AM.
WilliamTech is offline  
post #5 of 11 (permalink) Old 04-13-2016, 07:47 PM
Senior Member
 
RoadHopper's Avatar
 
Join Date: Oct 2015
Location: Los Angeles - Central
Posts: 570
iTrader: (0)
 
Garage
Quote:
Originally Posted by gidaeon View Post
I realize the vaccum port to petcock would be metric. But I need to plug it with a sae size plug for tw200 conversion.
Are you guys using 5/16? 1/4? different? My eyeball guesstimates aren't that great, and I don't have access to carb for a few days.
So. . . how long do you want it to be not working in its old role correctly?

RoadHopper is offline  
post #6 of 11 (permalink) Old 04-13-2016, 07:54 PM
Senior Member
 
calebj's Avatar
 
Join Date: Sep 2015
Location: Roanoke, VA
Posts: 499
iTrader: (0)
 
Garage
Quote:
Originally Posted by WilliamTech View Post
Quote:
Originally Posted by Knifemaker View Post
Fuel hoses are 5/16 ID.
I utilize clear Line purchased off Reels from True Value Hardware store.
Clear is nice for fuel flow observation (when-ever needed).
..... is flexible for routing...stretches over nipples, No clamps required

Clear ? Fuel Line 3/16 ? Vacuum Line

enjoy
I finally stopped using clear because it always hardened, yellowed, and usually requiredrequired clamps. Yours doesn't yellow and harden?
calebj is offline  
post #7 of 11 (permalink) Old 04-13-2016, 08:00 PM
..have a vulcan good day!
 
WilliamTech's Avatar
 
Join Date: May 2011
Location: Pensacola, FL.
Posts: 4,508
iTrader: (17)
   
Quote:
Originally Posted by calebj View Post
I finally stopped using clear because it always hardened, yellowed, and usually requiredrequired clamps. Yours doesn't yellow and harden?
?
I have had it on there for 3+ (?) years..... I need to look at it ! LOL

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
WilliamTech is offline  
post #8 of 11 (permalink) Old 04-13-2016, 08:27 PM Thread Starter
Senior Member
 
Join Date: Mar 2016
Location: MI
Posts: 292
iTrader: (0)
 
Sorry i was not clearer - im capping off the CARBs vacuum port of course, not the oem petcock since its being removed ;-)

I got a brief peek and 5/16 is definitely too big. It must be 3/16 or 1/4 to seal and stay on.
RoadHopper likes this.
gidaeon is offline  
post #9 of 11 (permalink) Old 04-13-2016, 10:31 PM
Senior Member
 
calebj's Avatar
 
Join Date: Sep 2015
Location: Roanoke, VA
Posts: 499
iTrader: (0)
 
Garage
I measured about .21 inches. Try 5mm or 3/16 for a vacuum cap.
calebj is offline  
post #10 of 11 (permalink) Old 04-13-2016, 10:42 PM Thread Starter
Senior Member
 
Join Date: Mar 2016
Location: MI
Posts: 292
iTrader: (0)
 
Quote:
Originally Posted by calebj View Post
I measured about .21 inches. Try 5mm or 3/16 for a vacuum cap.
You are the man! Does it matter if I get the thick rubber ones or the thinner vinyl looking. the auto stores I see have both styles I assume it doesn't matter?

List: Vacuum Caps | O'Reilly Auto Parts

wasn't sure if gas ever works its way "out" of the part and could degrade a cap

2002 vn750
AGM battery, Shinko 230 tires oversized front
Ear shaved - k&n pods, drilled clutch basket
MCCT
40/138 jetting

If I can split a case and make it work - you can too!
Forum pictures:http://s150.photobucket.com/user/Gid...?sort=3&page=1
gidaeon is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome