Yost power tube & S&S carb performance inquiry - Harley Davidson Forums: Harley Davidson Motorcycle Forum
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 11-21-2012, 08:49 PM Thread Starter
Junior Member
 
Join Date: Apr 2012
Location: Granite City Il.
Posts: 3
Yost power tube & S&S carb performance inquiry

I need to gather some hands on information regarding the Yost power tube in a S&S carb. The cost is around $50. or so, but does it accomplish any noticeable improvements in the performance of an EVO 80cid. I'd like to get some feedback from anyone who operated with one of these. It tells of misting the fuel, or breaking it down to a fine mist. Is something noticed other than a lack of $50. from your wallet. Please reply.
Behind bars is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 11-22-2012, 07:25 AM
Banned
 
Join Date: Sep 2009
Location: Hamilton, Canada
Posts: 5,336
Images: 4
I tried one in my CV carb and didn't notice any difference. Playing with jetting was more difficult because you must use their jets and none of my buddies had any I could try. I ended up going to the CVPerformance unit. Similar functionality and their jets interchange with the stock jets. I got it in a kit from J&P but you can buy it separately.

http://www.cv-performance.com/cvp-ve...emulsion-tube/
chris_lacey is offline  
post #3 of 5 (permalink) Old 11-22-2012, 07:38 AM
Retired citizen
 
SCHMIDTYS's Avatar
 
Join Date: Jun 2009
Location: Pt. Wash.,WI
Posts: 14,676
The S&S benefits more from installing a Thunder-Jet kit ... just saying.

Disclaimer : Don't believe anything I say unless you are absolutely sure that I know what I'm talking about .
SCHMIDTYS is offline  
post #4 of 5 (permalink) Old 11-22-2012, 07:44 AM
Banned
 
Join Date: Feb 2011
Location: UK
Posts: 681
I had a Yost tube in an S&S on my 1990 FXRS. Didn't notice any great difference.
Baldrick is offline  
post #5 of 5 (permalink) Old 11-26-2012, 02:17 PM
Senior Member
 
Join Date: Sep 2008
Location: Munnsville, N.Y.
Posts: 1,627
Quote:
Originally Posted by SCHMIDTYS View Post
The S&S benefits more from installing a Thunder-Jet kit ... just saying.

I agree.
On the dyno you are in control of the fuel reqirements with the 3 circuits, and the adjustable air bleed, and also, is so desired, the use of dedicated plenum lengths via their spacers.
Scott

"....3 dueces and a 4 speed..........and a 389"..........
Goodson H-D Cylinder Head Tooling Manufacturer
Celebrating 30 Years of HD Engine Building
Hillsidecycleco is offline  
Reply

Quick Reply
Message:
Options

Register Now



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

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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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