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Carb Rebuild Advice

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Old 10-31-2017, 07:20 AM
BobbyH83 BobbyH83 is offline
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Default Carb Rebuild Advice

2003 lowrider, carb has never been rebuilt as far as I know. When I got the bike, owner said he was running it with the enrichner out just a bit. I found keeping it out enough to hold the idle 1000-1200 seemed to do the trick once she was warmed up some. Still getting some coughs through the carb when cold, but not too bad. Plugs need to be changed, they are black. Should I just adjust the idle (I think it needs to be higher) and air mixture or go ahead and do a full clean and rebuild on the carb to start from square one? Gasket kits are cheap enough. What is a good brand if I should go that route?
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Old 11-01-2017, 08:25 AM
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grbrown grbrown is offline
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Your bike is 14 years old and for the time and cost involved it would certainly be worth stripping and rebuilding it. Get the full kit including slide and diaphragm. It's a long time since I last did mine, so can't help with brand, but the usual suspects like J&P and others probably have them.

The running problems may be down to dirt inside the float chamber, or mucky jets, possibly the diaphragm, so new parts will take away those doubts.
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Old 11-09-2017, 12:01 PM
MGN54 MGN54 is offline
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Check this site out for some good info, parts, etc. They seem to have a lot of answers for us guys with carbs.

cv-performance.com

Good luck on getting things sorted.
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Old 11-14-2017, 07:03 AM
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HD CV carbs are VERY straightforward.
First, if in fact the air/idle mixture screw welch plug is still in place, remove it via drilling thru, and picking it loose.
Now you can adjust the air/idle circuit.
Gently bottom out the screw, and back it out 2 3/4 turns.
You may need to re-set the idle once up to full operating temps.
With the choke needing to be out to ride, about a 100% chance the pilot jet is too small, starving the bike.
Bump that jet up until the coughing/sneezing is gone.
Scott
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Old 12-14-2017, 05:41 PM
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So how did you do? i am process of same thing..my first big issue was for a 16 yr old bike..check the gas tank..mine is starting to fail inside with some rust,,and also the liner peeling...i temporarily cleaned it, (it got dirty later again) but before that, i am getting 35mpg..i am looking for about 40mpg..so trial and error on jets etc..also i have to change the intake manifold seals,,that was a project to get them vacuum free..but 3 times a charm...mine is 01 dwg...twin cam...
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Old 12-14-2017, 06:17 PM
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The best advice I could give would be : after you get it all apart get some good carb cleaner , not in the can as it's not strong enough , some good stuff you can get at auto parts stores in 1gal at about $25 or take everything to a auto machine shop and have them soak the stuff for awhile , $5 or $10 it will really make a difference -- IMO
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Old 12-15-2017, 06:30 AM
BobbyH83 BobbyH83 is offline
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Sorry for never updating, I ended up with a thread in the Dyna section as the bike is a low rider. I took everything apart and cleaned it with spray. Really wasn't that dirty, I don't think trash was the issue. Started at square one with the mixture screw since it has been adjusted before. Bike wouldn't idle without the enrichner and idle speed adjustment didn't do much. Switched to a 48 jet, 2 turns out on the mixture screw and she is perfect. Replaced the enrichner cable as well- old one broke. In reality, I'm a touch rich but I can live with it. I'm not chasing the last 1 or 2 mpg or mph.
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Old 01-08-2018, 07:34 AM
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Planning on rebuilding my carb (2001 DWG). Ordered kit with new diaphragm. Going to order the 88 Sporty Jet. Is there a sticky, or other post with detailed instructions? Maybe tools needed as well. First Harley, I need to get the shop manual, but want to get this carb straightened out. Thanks
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Old 01-08-2018, 07:43 AM
BobbyH83 BobbyH83 is offline
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Quote:
Originally Posted by BruceT1971 View Post
Planning on rebuilding my carb (2001 DWG). Ordered kit with new diaphragm. Going to order the 88 Sporty Jet. Is there a sticky, or other post with detailed instructions? Maybe tools needed as well. First Harley, I need to get the shop manual, but want to get this carb straightened out. Thanks


Just basic tools, screwdriver, sockets, and a couple wrenches. Lots of youtube videos on loosening the throttle cables and tightening them back down. Carb removal too i think. Other than that, lay things out in the order they come off/go back together. Do it all in the same day so you don't forget. Pin holding the float has an arrow cast into the carb body- goes in the direction of the arrow and out the other way if you remove it.


https://cv-performance.com/instructions-guides
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Old 01-14-2018, 09:04 PM
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Did you change the emulsion tube? This is needed as the stock tube is too restrictive. (No, you can't just "drill holes in it...")
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