Carb Jetting???
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Carb Jetting???
I know jetting the carb right is vital for performance.Do you need to rejet when you just change the pipes or when you change both the pipes and air cleaner.Also is doing a jet kit pretty simple or would take it to a bike shop and get it done.Ive jetted my dirtbikes and quads before so I think I could tackle it.Just dont know if theres any catches with the harley..
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From: My house
RE: Carb Jetting???
Usually when you put on aftermarket pipes, you do the breather change as well for the best perfomance. With your experience, I'd say you should'nt have any trouble doing the jetting job. I would recommend getting a shop manual for your bike and you should be able to do most of the minor maintenance or repairs as well, HD motors are'nt that complicated and are fairly easy to work on for the most part.
Good luck
John TN
Good luck
John TN
Grand HDF Member
Joined: Dec 2004
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From: Midland, TX
RE: Carb Jetting???
The best is a Harley service manual. It's about 50 bucks but well worth the money. The thing is easy to read and has a bunch of illustrations, which help non motorheads like me.
When you change the breather, you will normally get one that is going to let in more air. That plus the pipes generally mean a rejet.
When you change the breather, you will normally get one that is going to let in more air. That plus the pipes generally mean a rejet.
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Intermediate
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RE: Carb Jetting???
I think I will only have my pipes before this weekend.If I just change the pipes and not the filter can I get away without jetting at first and then do the jetting when I install the k&n filter?
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Joined: Dec 2004
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From: Bloomfield, NM
RE: Carb Jetting???
What pipes are you getting?
I think the HD catalog says that for most of their pipes you don't have to re-jet if you only change pipes. On other pipes, I'm not sure.
These bikes are really lean from the factory, so I would be concerned about any breathing modification causing a too lean condition.
Regards,
Bill
I think the HD catalog says that for most of their pipes you don't have to re-jet if you only change pipes. On other pipes, I'm not sure.
These bikes are really lean from the factory, so I would be concerned about any breathing modification causing a too lean condition.
Regards,
Bill
"Moderator & Connoisseur of Ice Cream"
Joined: Apr 2005
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From: Montgomery Al
RE: Carb Jetting???
SE I's you may not have to rejet if you go with pipes only, and no breather upgrade.
SE II's - rejet.
I would not reccomend running a free breathing pipe like the SE II's without changing the breather.
To let more air out (which is what free breathing pipes susch as SE II's do) you must put in more air to achieve a balanced ratio of in/out.
Anytime you change the air flow through your powerplant, you must make sure enough fuel is getting in with the air. Too little fuel and you will run hot and fry things that ought not to fry.
Mikeeeeeeeee
SE II's - rejet.
I would not reccomend running a free breathing pipe like the SE II's without changing the breather.
To let more air out (which is what free breathing pipes susch as SE II's do) you must put in more air to achieve a balanced ratio of in/out.
Anytime you change the air flow through your powerplant, you must make sure enough fuel is getting in with the air. Too little fuel and you will run hot and fry things that ought not to fry.
Mikeeeeeeeee
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Seasoned HDF Member
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From: My house
RE: Carb Jetting???
Bill's right if you change the pipes and you are too lean if you don't run it hard you probably would'nt hurt the motor but you take a chance on bluing or turning the pipes gold color. I have found most of the time when you don't do something you need to, you tend to put it off cause you want to be riding. If you are getting the pipes go ahead and do it right the first time, and you will have no worries and will be ready to ride whenever, wherever. If you want to tune the bike correctly then you would need to have it dyno-checked to make sure your air fuel ratio or AFR is correct and not on the lean side. Just my 2 cents.
John TN
John TN
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