For anyone thats coastered....... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Engine / Exhaust / Cooling
\ From the radiator, through the case and out
the exhaust. If it has to do with the cooling,
engine or exhaust, discuss it here!

LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 06-17-2007, 11:03 AM Thread Starter
Join Date: Jun 2007
Posts: 17
iTrader: (0)
For anyone thats coastered.......

I ordered a coaster-kit from, nice kit but the vacuum hose plug/removal directions for the CA version bikes was somewhat 'generic'. I decided to call them yesterday (spoke with a dude named Guy, very knowledgable) to get some clarification and picked up some tips that maybe of value to some of you that have also coastered as follows.

1. The CA version has 2 tank vents (instead of 1 for the 49 state-blue only) 'blue-left and red-right'. After removal of the charcoal canister and seperator or 'pump' as kawa calls it, you need to plug the red-right line and leave the blue-left open. This is necessary to prevent fuel seepage after fillup AND fuel starvation under load.

2. Their is a 3rd large vacumm line from the air-switch under the seat (all models) diameter the size of your thumb that terminates into the 'duct'. This needs to be plugged or you will pull unfiltered air into the system and run lean.

3. After the gutting of all of my hardware/plumbing their was an additional smaller line running into the duct that also need to be capped or again you will pull unfilter air and run leaner.

4. Guy at Sherms also recommended to bump the idle up to 1250-1300 rpm to lean the idle mix abit as you will richen up if all lines to duct are properly capped. He also said that no rejetting should be necessary unless you install an aftermarket exhaust system or do an ear shave.

After the coaster install/Un-CA'n of my bike I have NO poping on decel and the incredibly annoying rattling of my airswitch at around 4-grand is distant memory. IMO, the information and assistance from sherms alone was worth the $23 I spent for the kit.

Last edited by bonzer; 06-17-2007 at 11:23 AM.
bonzer is offline  
Sponsored Links
post #2 of 5 (permalink) Old 06-17-2007, 05:26 PM
and the Adventure Cycle
hyperbuzzin's Avatar
Join Date: Jun 2004
Location: Western PA
Posts: 6,138
iTrader: (1)
Some good info there. Thanks for sharing

AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC

"When life throws you curves,
Aim for the apex."

Author Unknown
hyperbuzzin is offline  
post #3 of 5 (permalink) Old 06-17-2007, 06:43 PM
Senior Member
BMan23777's Avatar
Join Date: Mar 2007
Location: Near Cooperstown, New York
Posts: 722
iTrader: (0)
Just made my own coasters from 1/4" Aluminium.And damed if My rattle at 4,000 rpms is gone too!!!! Had to be that dame air valve too!!

Brian Manchester
'89 "GRIMM"

CUSTOM-Seat,quick detach backrest,2.5"slam brackets,Pipes,Fender struts,head light mount,9"rise dragbars,Grips,Mirrors, turnsignals,LED brake light/Lic.plate frame,Chopper headlight. Shaved,Jetted,coastered,polished forks,saddle&Tool bags,horns moved,180/70/15 rear tire!!! Yes a 180!!!!And other stuff.....
Springfield 1911-A1 Compact .45acp

03 F250 superduty 4x4 V-10 crew cab long box 33's,CAI,SS duals with magnaflow

04 durango AWD
BMan23777 is offline  
post #4 of 5 (permalink) Old 06-17-2007, 08:57 PM
Senior Member
Join Date: May 2007
Location: vacaville, ca
Posts: 159
iTrader: (2)
thank you . you just answered so much for me.
tanz1983 is offline  
post #5 of 5 (permalink) Old 05-08-2009, 05:03 PM
Join Date: Mar 2009
Posts: 29
iTrader: (0)
This might sound dumb but what is the ca is that california version ? sounds complicated, or maybe I'm making more out of it then It really is ?
mw32904 is offline  
Sponsored Links


Quick Reply

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


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

Email Address:


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