cv carb question
Thread Starter
|
Tourer
Joined: Jun 2009
Posts: 400
Likes: 2
From: Montreal (Quebec)
cv carb question
I got a 95 FLSTC. I just put a dyno jet carb kit with a Ezscrew for the fuel mixture.
I try to tuned the carb.. but I have question.. For now thw idle is good and the bike run fine.
But when I try to tuned the carb, I turn the mixture screw clockwise or counter clokwise, nothing seen to change. When I remove the mixture screw the motor die..
So I want to know what is the reaction to motor when I turn clokwise and counter clokwise.
thanks
I try to tuned the carb.. but I have question.. For now thw idle is good and the bike run fine.
But when I try to tuned the carb, I turn the mixture screw clockwise or counter clokwise, nothing seen to change. When I remove the mixture screw the motor die..
So I want to know what is the reaction to motor when I turn clokwise and counter clokwise.
thanks
Road Captain
Joined: Dec 2010
Posts: 720
Likes: 3
Clockwise if you figure the relationship of it being on the underside of the carb, leans the mixture at idle and low rpms. Counter richens it. If you turn the screw until it seats (lightly) and it doesn't die that means your pilot jet is too rich. Cleanest smoothest idle should be around the 1-1/2 to 2-1/2 turns out from seat range. If it's out further than 2-1/2 tuns out try a leaner pilot.
Thread Starter
|
Tourer
Joined: Jun 2009
Posts: 400
Likes: 2
From: Montreal (Quebec)
I have a dyno jet thunderslide kit.
Thread Starter
|
Tourer
Joined: Jun 2009
Posts: 400
Likes: 2
From: Montreal (Quebec)
Clockwise if you figure the relationship of it being on the underside of the carb, leans the mixture at idle and low rpms. Counter richens it. If you turn the screw until it seats (lightly) and it doesn't die that means your pilot jet is too rich. Cleanest smoothest idle should be around the 1-1/2 to 2-1/2 turns out from seat range. If it's out further than 2-1/2 tuns out try a leaner pilot.
In the kit, I got the choice between 4 main jet. 1 for stock, 1 for light mods, etc.... I put the second main jet, should I go with the first one.
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
Try going back to the stock main jet size, and stock pilot jet size. If the air bleed screw makes no difference then, you may have an vacuum leak. If the engine is idling too fast then the screw will make no difference. The screw on a CV controls fuel, so turning it in leans out the mixture, turning it out richens the mixture. On a Mikuni it works just the opposite. Hope this helps.
Last edited by miacycles; Jul 20, 2011 at 09:05 AM.
Trending Topics
Road Captain
Joined: Dec 2010
Posts: 720
Likes: 3
The screw will not be affected by the main jet size. You need to change the slow (idle) jet if you can't get the fuel screw to make a difference.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Road Captain
Joined: Mar 2008
Posts: 601
Likes: 6
From: Aruba
Yup. Main jet will not affect anything until you're running at 1/2 throttle or more. Unfortunately, a lot of the kits out there don't include any pilot jets. You have to get them yourself. They're about $2.50 each so you can buy a range of them and tinker to your liking.
I would start out with a 44 slow jet and work up or down from there. Stock jet in a 95 was probably a 42 which is too lean. You can use a different needle and/or needle settings to enrichen the idle/slow circuit or change jets. Right now something is either installed incorrectly or else your pilot jet is too big since the idle screw makes no difference.
I would start out with a 44 slow jet and work up or down from there. Stock jet in a 95 was probably a 42 which is too lean. You can use a different needle and/or needle settings to enrichen the idle/slow circuit or change jets. Right now something is either installed incorrectly or else your pilot jet is too big since the idle screw makes no difference.