Harley Davidson Forums

Loading


Hello

Guest

Welcome to the harley davidson forum. Join our discussion today for FREE!

CREATE ACCOUNT

Membership Benefits

Get your questions answered by harley davidson community gurus and industry experts. Exchange your experience with another members. Access full features forum. Get a members discounts for your harley parts & accessories.

Help! Evo CV Carb Jet Recommendations?

Engine, Fuel and Exhaust

Reply
 
Thread Tools Display Modes
Old Mar 6th, 2009, 09:00 PM     #1
Start The Engine
Ride: '96 Road King
 
T-Skully's Avatar
 
Join Date: Oct 2nd, 2008
Location: North Carolina
Posts: 30
My Mood: My Mood
T-Skully is an unknown quantity at this point
Exclamation Help! Evo CV Carb Jet Recommendations?

Can anyone recommend jet sizes (low & high speed) for my stock CV carb. I have 96 Road King that has a K&N filter upgrade, Andrews EV27 cam, Vance & Hines slip ons and a SE 8,000 limit ignition module. Im wanting to upgrade the stock carb but not sure which jet sizes to use.
T-Skully is offline   Reply With Quote
Old Mar 6th, 2009, 09:43 PM     #2
Moderators
Ride: '11 FLSTC (Heritage Softail Classic)
 
TQuentin1's Avatar
 
Join Date: Apr 4th, 2008
Location: Summerwood in Humble, TX
Posts: 4,279
TQuentin1 is on a distinguished road
Re: Help! Evo CV Carb Jet Recommendations?

Quote: Originally Posted by T-Skully View Post
Can anyone recommend jet sizes (low & high speed) for my stock CV carb. I have 96 Road King that has a K&N filter upgrade, Andrews EV27 cam, Vance & Hines slip ons and a SE 8,000 limit ignition module. Im wanting to upgrade the stock carb but not sure which jet sizes to use.
Start here:

CV Carburetor Jet Adjustment/Trouble Shooting - Harley Davidson Community (CV Carburetor Jet Adjustment/Trouble Shooting)

Then look for more here:

Fuel and Carb Related Issues - Harley Davidson Community

TQ
__________________

Please stop by the "The Self-Help pages."
>>Self-Help Information and Tips - Harley Davidson Community Self-Help Threads Information<< click me!
TQuentin1 is offline   Reply With Quote
Old Mar 6th, 2009, 10:59 PM     #3
Wise Member
Ride: 0
 
Join Date: Jun 21st, 2007
Posts: 26,212
My Mood: My Mood
glider is on a distinguished road
Re: Help! Evo CV Carb Jet Recommendations?

Here also.

*Twin Cam CV Carb Rejet Suggestions - Harley Davidson Community (*Twin Cam CV Carb Rejet Suggestions)
glider is offline   Reply With Quote
Old Mar 6th, 2009, 11:57 PM     #4
Start The Engine
Ride: '96 Road King
 
T-Skully's Avatar
 
Join Date: Oct 2nd, 2008
Location: North Carolina
Posts: 30
My Mood: My Mood
T-Skully is an unknown quantity at this point
Re: Help! Evo CV Carb Jet Recommendations?

This saying Twin Cam will it apply to my Evo also? Will the 46 be the best choice and should I try the 185 or the stock 190? I should have also mention it appears to have had power tube installed by the previous owner. Does this change the jetting options?

Last edited by T-Skully; Mar 7th, 2009 at 12:22 AM.
T-Skully is offline   Reply With Quote
Old Mar 7th, 2009, 01:38 AM     #5
Moderators
Ride: '11 FLSTC (Heritage Softail Classic)
 
TQuentin1's Avatar
 
Join Date: Apr 4th, 2008
Location: Summerwood in Humble, TX
Posts: 4,279
TQuentin1 is on a distinguished road
Re: Help! Evo CV Carb Jet Recommendations?

Quote: Originally Posted by T-Skully View Post
This saying Twin Cam will it apply to my Evo also? Will the 46 be the best choice and should I try the 185 or the stock 190? I should have also mention it appears to have had power tube installed by the previous owner. Does this change the jetting options?
Jetting is a bit trial and error on the CV. I think with your Stage 1 upgrades, you can try the 46 low speed, and the 190 high. You might want to put a couple of washers under the needle. If the power tube you are talking about above is the YOST, that should just help atomize the fuel better. Here's a quick test that will tell you if you have too fat of a jet in the top end....

Run the bike through the gears into third gear and run third up to 60-70 MPH full throttle, then chop the throttle about 1/8 to 1/4 back and see if the bike either surges ahead or stumbles then recovers.

If it surges ahead, your jetting is lean
If it stumbles and recovers , your jetting is rich
If it makes no difference, you're pretty close.

Quick and easy, pretty accurate too.

This is from the first link I sent you. See earlier in that link how to evaluate the low speed jet.

TQ
__________________

Please stop by the "The Self-Help pages."
>>Self-Help Information and Tips - Harley Davidson Community Self-Help Threads Information<< click me!
TQuentin1 is offline   Reply With Quote
Old Mar 7th, 2009, 08:05 AM     #6
Wise Member
Ride: 0
 
Join Date: Jun 21st, 2007
Posts: 26,212
My Mood: My Mood
glider is on a distinguished road
Re: Help! Evo CV Carb Jet Recommendations?

Quote: Originally Posted by T-Skully View Post
This saying Twin Cam will it apply to my Evo also? Will the 46 be the best choice and should I try the 185 or the stock 190? I should have also mention it appears to have had power tube installed by the previous owner. Does this change the jetting options?

Pretty much the same when jetting for the TC or evo, maybe just stick to the 45 in the evo being it is a bit smaller. The mixing of parts from kits will sometimes give you some problems too.
glider is offline   Reply With Quote
Old Mar 7th, 2009, 06:14 PM     #7
Warming The Wheels
Ride: 1967 FLH
 
Join Date: Feb 27th, 2009
Location: Munnsville, N.Y.
Posts: 118
FishHunter is an unknown quantity at this point
Re: Help! Evo CV Carb Jet Recommendations?

The 46 may work, but if there is any sneeze at anytime in the lower rpms or when cold, then I would suggest a 48, especially on a engine with stock compression, as the carb signal will not be as strong, as one with enhanced compression.
FishHunter is offline   Reply With Quote
Old Mar 7th, 2009, 07:14 PM     #8
Start The Engine
Ride: 2002 Custom
 
Join Date: Dec 1st, 2008
Posts: 13
My Mood: My Mood
lzmj3s is an unknown quantity at this point
Re: Help! Evo CV Carb Jet Recommendations?

Find a shop in your area with a Dyno. Takes away all the guesswork. Good dyno operator can give you a readout at all RPMs and save you a lot of time experimenting.
lzmj3s is offline   Reply With Quote
Old Mar 9th, 2009, 08:48 PM     #9
Warming The Wheels
Ride: 1967 FLH
 
Join Date: Feb 27th, 2009
Location: Munnsville, N.Y.
Posts: 118
FishHunter is an unknown quantity at this point
Re: Help! Evo CV Carb Jet Recommendations?

That'll ace it for sure.
FishHunter is offline   Reply With Quote
Old Mar 14th, 2009, 02:59 PM     #10
Play The Throttle
Ride: 03 FLHPI
 
Caper's Avatar
 
Join Date: Mar 14th, 2009
Location: Cape Breton NS
Posts: 236
Caper is an unknown quantity at this point
Re: Help! Evo CV Carb Jet Recommendations?

Most of you time you're on the needle from 1/4- 3/4 throttle. Here's a baseline for you to start with....45 Pilot N65C needle (27094-88) a 180 or 185 main and the mixture screw turned out 2 1/2 turns out from gently seated. get the idle circuit dialed in first then work your way up to the main, you're only fully on the main from 3/4 to WOT.
Caper is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Gps recommendations Redman Touring Models 26 Feb 1st, 2010 07:46 PM
can anybody help??00-03fxst (carb) 04-05 (carb) tank differences 04hdstroker Other Service and Maintenance 1 Sep 27th, 2009 09:28 PM
Tire recommendations dblt74 Touring Models 13 Jan 27th, 2009 08:25 PM
Any recommendations for new shocks? threesteps Dyna Models 1 Nov 9th, 2008 08:19 AM
Difference between SE Air Cleaner Kits for EVO carb vs. TC88 carb airboatphil Engine, Fuel and Exhaust 3 Sep 13th, 2008 08:49 PM