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cv carb, sputtering

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  #1  
Old 21st August 2015
jlongbrake's Avatar
jlongbrake jlongbrake is offline
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Sportster/Buell Model: 883 Sportster
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Default sputtering issues

So my 02' sportster has had some issues with sputtering. Started this season. When I get on it it hesitates and sputters. If I ease into the throttle and gradually pick up speed it's fine, but if I hammer into it, it sputters. But today it acts like I'm running out of gas. first three gears is terrible, but 4th and fifth have no problem. Instead of baaaaaaaaaaa. I get babababaaaabababa. If that makes sense.
I thought maybe adjusting the enrichment screw. Possible too lean or too rich. I also thought fuel filter, but it idles fine and 4th and 5th are fine.

Thoughts?

Details: 45 slow jet. Yost power tube both installed nine years ago.
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  #2  
Old 21st August 2015
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Quote:
Originally Posted by jlongbrake View Post
So my 02' sportster has had some issues with sputtering. Started this season. When I get on it it hesitates and sputters. If I ease into the throttle and gradually pick up speed it's fine, but if I hammer into it, it sputters. But today it acts like I'm running out of gas. first three gears is terrible, but 4th and fifth have no problem. Instead of baaaaaaaaaaa. I get babababaaaabababa. If that makes sense.
I thought maybe adjusting the enrichment screw. Possible too lean or too rich. I also thought fuel filter, but it idles fine and 4th and 5th are fine.

Thoughts?

Details: 45 slow jet. Yost power tube both installed nine years ago.
I would start with the basics. Check the plugs this will give you
an idea how rich or lean you are. Check accelerator pump. Check
plug wires and battery connections.
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  #3  
Old 25th August 2015
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Dealing with the same issue, just checked mine with carb spray around the intake and died when sprayed on the front cylinder. I'll be changing those tomorrow
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