Harley davidson carburator support bracket? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans Advertise
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-05-2019, 04:48 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
Harley davidson carburator support bracket?

I'm putting a Harley Davidson CV-40 carburetor on my little Suzuki. On a Harley the air cleaner bolts to the breather bolts to hold it in place but there is no clamp on the spigot.

I'm using a 2 bolt spigot carb adapter that uses a clamp. Do I still need to fabricate a holder mount?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-05-2019, 09:41 AM
Registered User
 
Join Date: Jan 2018
Location: Laurel, De.
Posts: 424
Wiki Edits: 0

Thanks: 215
Thanked 168 Times in 126 Posts
I would put an out board bracket/support of some sort on it. There's not alot of meat for a standard hose clamp to hang onto on the backside of a H-D CV. A CV 40 might be a lot of carb for a little Suzuki.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-05-2019, 11:40 AM
Registered User
 
Join Date: Apr 2007
Posts: 12,381
Wiki Edits: 0

Thanks: 179
Thanked 1,139 Times in 910 Posts
How big of a Suzuki?

Bogie
Reply With Quote Quick reply to this message
 
  #4 (permalink)  
Old 01-05-2019, 11:53 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
It's my 660cc mini truck. OHC 12v 3cyl. The factory carb is around 38mm but is in need of replacement and the trucks idle control system isn't working.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-05-2019, 12:37 PM
Registered User
 
Join Date: Jan 2018
Location: Laurel, De.
Posts: 424
Wiki Edits: 0

Thanks: 215
Thanked 168 Times in 126 Posts
Quote:
Originally Posted by matt167 View Post
It's my 660cc mini truck. OHC 12v 3cyl. The factory carb is around 38mm but is in need of replacement and the trucks idle control system isn't working.
The Cv40 more then likely came off a 1340. More then likely a 42-44 pilot jet and 160-180 main with an emulsion tube set up for the 1340cc's and how much air it pulls. Kind of seeing a tuning dilemma.

Unless the original is just slam wore out might be worth a cleaning and a few gaskets. Sounds like something is plugged in the idle circuit.

Last edited by Hipster_G; 01-05-2019 at 12:45 PM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-05-2019, 12:52 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
I bought one set up for an 883 Sportster. I'm prepared to re jet it as needed.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-05-2019, 04:44 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
What kind of jetting do you think I might need to start? I was thinking like 175 main, and 35 low jet
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-05-2019, 04:55 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
Quote:
Originally Posted by Hipster_G View Post
The Cv40 more then likely came off a 1340. More then likely a 42-44 pilot jet and 160-180 main with an emulsion tube set up for the 1340cc's and how much air it pulls. Kind of seeing a tuning dilemma.

Unless the original is just slam wore out might be worth a cleaning and a few gaskets. Sounds like something is plugged in the idle circuit.
The original uses 2 vacuum dashpots, 2 relays and 2 vacuum solenoids to control the idle. The throttle lever system rides on one of the 2 dash-pots at all times. Something is causing the entire system to go erratic. It will idle correctly sometimes, and then other times it's racing due to the high idle kicking in, and sometimes it's completely floating because it's not riding on a stop. The relay's alone are near $100 each plus a month to get them.. It is made by Mikuni and I might be able to take off all the extra throttle control stuff If I could find a bracket. But the new carb tuned correctly should work fine. Or at least buy me some time to fix up the original carb/ system
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-06-2019, 08:10 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
I ordered a 170 main jet. It has a 185. I think. It's a knockoff carb so I didn't pay a lot but it does look good. I'll go through it when I swap the jet. The pilot jet, I'll just adjust the mix screw to get it good enough. The engine really likes 3k RPM and up. since it's low geared it runs about 5k rpm at 90 KPH ( ~55 MPH ) and will wind out to about 7k RPM so it can use a little fatter mix, rather than leaner as any mis tuning and I could burn it up
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-06-2019, 03:16 PM
Member
 
Join Date: Feb 2004
Location: N Ga.
Posts: 860
Wiki Edits: 0

Thanks: 33
Thanked 89 Times in 78 Posts
What carb are you using? Usually a bracket from the carb mount stud to the crankcase is all you need.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-06-2019, 03:57 PM
Cars, Trucks, Boats
 
Join Date: Dec 2012
Location: Toledo, N.W.Ohio, USA
Age: 71
Posts: 6,338
Wiki Edits: 0

Thanks: 13
Thanked 772 Times in 726 Posts
Today's gas can leave an almost invisible waxy build up that blocks fuel flow... that may be what you're dealing with...
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-06-2019, 04:46 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
Quote:
Originally Posted by st3gamefarm View Post
What carb are you using? Usually a bracket from the carb mount stud to the crankcase is all you need.
Harley Davidson/ Keihin ( sp ) CV 40 carb. It's a spigot mount so I have a spigot- bolt on adapter
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 01-06-2019, 04:57 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
Quote:
Originally Posted by BuzzLOL View Post
Today's gas can leave an almost invisible waxy build up that blocks fuel flow... that may be what you're dealing with...
starting cold has a bit of an issue. Takes about 3-4 mins before it will hold an idle from cold, but once it's at idle it's rock solid, until the control system takes over for engine load or temp depending. Slight stumble stabbing throttle if it's cold out but it's carbed. The real issue is with the control system which is a dumb system with no ECU feedback. I worked on it a little today just to try to get the idle to hold solid and figure it out... One dash pot pulls, and the other pushes. But the switching system with vacuum actually allows one to let go and the other to grab. The problem is the pusher is not pulling all the way back causing the throttle lever to float in between the stops. I tried just disconnecting it's vac and plugging it, which wouldn't allow the engine to even start. I'm going to put a heavyish spring on the dashpot to force it to return, and it should be ok for a while. When the system was working correctly you would swear it was fuel injected it ran so smooth

Last edited by matt167; 01-06-2019 at 05:08 PM.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 01-07-2019, 03:52 PM
Member
 
Join Date: Feb 2004
Location: N Ga.
Posts: 860
Wiki Edits: 0

Thanks: 33
Thanked 89 Times in 78 Posts
Quote:
Originally Posted by matt167 View Post
Harley Davidson/ Keihin ( sp ) CV 40 carb. It's a spigot mount so I have a spigot- bolt on adapter
I never did like those carbs. I prefer a Bendix. But I suppose it beats a Mikuni.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 01-07-2019, 04:59 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Join Date: Aug 2005
Location: Prattsville
Posts: 7,213
Wiki Edits: 31

Thanks: 5
Thanked 197 Times in 175 Posts
It should work ok once I have it jetted right.. If I didn't get 39 mpg with the truck, I wouldn't bother keeping it around but it's really too handy and economical to let it go.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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:
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Harley Davidson shocks kleen56 Suspension - Brakes - Steering 9 07-21-2011 06:12 AM
Harley-Davidson Factory Tours mgold Hotrodders' Lounge 3 08-25-2009 07:31 PM
Harley Davidson Polish Painter Body - Exterior 6 08-01-2009 10:42 AM
Harley Davidson site as good as this one? zachscc Engine 1 08-26-2003 10:58 PM
I just bashed the baffles outta a 2 day old harley davidson sportster! stonedchihuahua Hotrodders' Lounge 33 07-06-2003 11:49 AM


All times are GMT -6. The time now is 11:49 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.