CV Spring installation
Thread Starter
|
Advanced
Joined: Jun 2006
Posts: 73
Likes: 0
CV Spring installation
Ok, I took off the top of the carb to see if the diaphram was bad, an now I can't get the spring in and the lid closed without it popping out. Any tips on how to to get it in? Do I need a special tool?
Tourer
Joined: Feb 2006
Posts: 429
Likes: 1
From: Southampton, Pa
RE: CV Spring installation
If you really did cut the spring the only thing I can tell you is to take it back apart throw away the cut spring and go to the dealer and get a new one, you really need the spring to be as long as it was to put the right amount of pressure to compensate for the amount of vacuum that pulls it up when you give it gas. The slide is the part of the carb that is the CV = constant velosity, this keeps the velosity of the air constant thru the carb by the demand of the engine and increases the fuel along with the air.
I live north of Phila Pa, if you are near me I would gladly come help you out or maybe you could get the bike to my place. Let me know. I'll be leaving on friday for 2 weeks in Maine.
I live north of Phila Pa, if you are near me I would gladly come help you out or maybe you could get the bike to my place. Let me know. I'll be leaving on friday for 2 weeks in Maine.
Thread Starter
|
Advanced
Joined: Jun 2006
Posts: 73
Likes: 0
RE: CV Spring installation
Really? How the heck do you get that thing in without it decompressing itself? As I pushed down, the middle would pop out. I cut about 1 inch off and it went in easily. I thought maybe it was that long so folks had to go to the dealer or think they needed a new carb. I'm in Iowa and it was gonna take 3 weeks for the local dealer to get me in? The thing seems to run good now, is this really improtant?
Road Master
Joined: May 2005
Posts: 1,121
Likes: 3
From: Mass.
RE: CV Spring installation
Sally,
Yes, it's important. That's why it's in there. I will give you credit though, I know a lot of people that are scared to death of opening up the carb.
I think I saw in another theread that you were having trouble with the bike accelerating, you may not have the diaphram properly seated in the groove in the top of the carb. You need to take it apart again anyways, get a new spring, a .004 shim for the needle and a #45 low speed jet.
disasemble ,again, and put the shim under the needle ,install the new spring and reassemble. make sure you have the diaphram in the groove, you may need to wiggle the top to work it in. check it by lifting the carb piston and letting it fall, it should fall softly, not just slam down, if it slams down you don't have the diaphram in the groove and it is leaking air. once you have the diaphram sealed install the screws and tighten them.
Now you can remove the bowl and install the #45 low speed jet. The bike will run great.
DC.
Yes, it's important. That's why it's in there. I will give you credit though, I know a lot of people that are scared to death of opening up the carb.
I think I saw in another theread that you were having trouble with the bike accelerating, you may not have the diaphram properly seated in the groove in the top of the carb. You need to take it apart again anyways, get a new spring, a .004 shim for the needle and a #45 low speed jet.
disasemble ,again, and put the shim under the needle ,install the new spring and reassemble. make sure you have the diaphram in the groove, you may need to wiggle the top to work it in. check it by lifting the carb piston and letting it fall, it should fall softly, not just slam down, if it slams down you don't have the diaphram in the groove and it is leaking air. once you have the diaphram sealed install the screws and tighten them.
Now you can remove the bowl and install the #45 low speed jet. The bike will run great.
DC.
Trending Topics
Thread Starter
|
Advanced
Joined: Jun 2006
Posts: 73
Likes: 0
RE: CV Spring installation
There is no way the full length spring was going in. It would go down to about an inch from closing and uncoil risking damage to the diaphram. I think it's way of Harley making someone go to the dealer. It runs fine now, I only took off 1 inch. If there is a way to get it back in I don't know about, I will get a new one. Please tell me how to do it! The funny thing is, the problem was fouled plugs and had nothing to do with the carb. I put in a 45 slow jet and 175 main two weeks ago.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
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
Road Master
Joined: Apr 2006
Posts: 782
Likes: 0
From: Shelton WA
RE: CV Spring installation
If your plugs were black it was and is the carb, most likely the slow jet, adjustment. Too rich. I read that you drilled out the plug. Once you get it warmed up turn the slow jet adjustment screw in slowly..very slowly until it stumbles, then out slightly. Check the plugs again in a week.
Ultimate HDF Member
Joined: Jun 2006
Posts: 8,438
Likes: 6
From: Gulf Coast of Mississippi
RE: CV Spring installation
I am not trying to be a smart @$$ here, but obviously it can be done, as it was in there before...
We use to do something similar to the old Holley Carbs... we would throw the spring away that controlled the 4 bbl... Where it would open immediately...
But that is apples and oranges....
Checked you fuel mileage lately... your plugs?
Charlie D.
We use to do something similar to the old Holley Carbs... we would throw the spring away that controlled the 4 bbl... Where it would open immediately...
But that is apples and oranges....
Checked you fuel mileage lately... your plugs?
Charlie D.