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Sportster Motorcycle General Discussion and Problems For discussing problems about your Sportster motorcycle that don't fit anywhere else.

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1996, carb, idle problems, jetting

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  #21  
Old 15th May 2012
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Kinch Kinch is offline
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Sportster/Buell Model: Sportster 1200 Custom
Sportster/Buell Year: 2006
Other Motorcycle Model: 1975 Honda CB750 K5
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I bought new plugs as well, the ones in the bike were a little bit carbon fouled so I just wanted to start out with fresh plugs. I'll check em though.

I'm with you on the vacuum petcock, I had one on a previous bike that caused me no end of problems. I'm used to turning off my fuel anyway.

This is the float tool that I used:
http://www.crfsonly.com/catalog/popu...e.php/pID/4092

It's really an unnecessary expense. It just makes it a lot easier to set it at the correct height and drop it over the float then you're trying to hold the carb at the correct angle
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  #22  
Old 15th May 2012
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Flame__ Flame__ is offline
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Join Date: May 2007
Location: Harlem, Ga
Posts: 4,796
Sportster/Buell Model: 1200 (Bruiser)
Sportster/Buell Year: 1989
Sportster/Buell Model #2: 883 (Fiona)
Sportster/Buell Year #2: 1988
Other Motorcycle Model: FLHTC (Ruby Lee)
Other Motorcycle Year: 2000
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Quote:
Originally Posted by Kinch View Post
This is the float tool that I used:
http://www.crfsonly.com/catalog/popu...e.php/pID/4092

It's really an unnecessary expense. It just makes it a lot easier to set it at the correct height and drop it over the float then you're trying to hold the carb at the correct angle
That's pretty neat. I had someone tell me about the float being mounted at an angle, luckily before I ever tried to set a float level. I would have made it level like I do for a carb on a car. Of course, I'd have to look at the service manual to know what degree angle to set it on.
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  #23  
Old 15th May 2012
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Kinch Kinch is offline
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Sportster/Buell Model: Sportster 1200 Custom
Sportster/Buell Year: 2006
Other Motorcycle Model: 1975 Honda CB750 K5
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It has to be sitting at and angle from 15 to 20 degrees. Enough to set the float on top of the pin but not enough to depress the pin and give an inaccurate reading.

Easiest way to do it is to print a protractor onto a piece of paper, tape it to a cardboard box and set the carb against it when setting the height to make sure it's at the right angle.
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  #24  
Old 15th May 2012
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Flame__ Flame__ is offline
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Join Date: May 2007
Location: Harlem, Ga
Posts: 4,796
Sportster/Buell Model: 1200 (Bruiser)
Sportster/Buell Year: 1989
Sportster/Buell Model #2: 883 (Fiona)
Sportster/Buell Year #2: 1988
Other Motorcycle Model: FLHTC (Ruby Lee)
Other Motorcycle Year: 2000
Reputation: 3826443
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Now that's a neat idea. Thanks.

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  #25  
Old 15th May 2012
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Harleydrummer Harleydrummer is offline
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Sportster/Buell Model: Xlh
Sportster/Buell Year: 1996
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Right let me start by saying sorry I've not posted since last week, but great news. My bikes running properly!
After trying alsorts of weird and wonderfull ways of testing for a leak and nothing showed up any thing, but I figured for the sake of £12 I would fit all new gaskets to the intake manifold and a new seal for where the carb mounts.
Wile I had the carb off I stripped it again. This time I managed to get my slow jet out, so I sprayed that through with carb cleaner again just to make sure. I also checked the needle jet was the right way round. Because if it's the wrong way round it courses the engine to die when the throttle is opened, exactly as my bike did. It was the wrong way round. Easy mistake. If you put it in the wrong way round it slides in easlie, but if you put it in the correct way round it will get stuck. I needed to use the needle to get it lined up right.

After all this I put the carb back together but this time with the needle and spring that comes with the dyne jet kit and the vacuum slide that I drilled out in accordance to the dyno jet kit instructions.
I fitted it to the bike, pulled the choke out and it started up. I let the revs rise before pushing in the choke half way and letting it warm up for a few minutes. I pushed the choke fulling in and to my great joy it help idle and revved up great.
I've put about 100miles on it this weekend. It's still giving the odd cough from the carb and a little lumpy unill it's warmed right up. Though I think I need to get the adjustments right on the idle mixture, the idle speed screw and the throttle and idle cables. But never the less it's running. Next job is to fit my new 12"rsd vintage bars withe custom painted bar clamp.

Thanks for every ones posts. It's been a great help
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  #26  
Old 15th May 2012
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Kinch Kinch is offline
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Sportster/Buell Model: Sportster 1200 Custom
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Harleydrummer, I'm curious...by needle jet do you mean the silver tube that sits on top of the main jet when you screw it in? Or is that supposed to drop in from the top?

Edit: Yes, the needle jet. it only seemed to go in the one way but now I think I may have mine in wrong as well. does the fatter longer end go up? I can't seem to get it into the passage that way...gonna go try again

Edit again...I can't seem to get it in the other way around. The PDF of the carb shows that it goes into the same passage as the main jet and then the main jet screws in underneath it...is this incorrect?
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  #27  
Old 15th May 2012
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Kinch Kinch is offline
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Sportster/Buell Model: Sportster 1200 Custom
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Hah, that was my problem as well...just needs to be coerced in there. Now it's idling perfectly and revving like a beast! Happy days.

Thanks to everyone and in particular, Harleydrummer!

I'm goin for a ride
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  #28  
Old 16th May 2012
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Minch that's great new. Two more sportsters back on the road this week. Glad you figured it out sorry I didn't get back to you quicker.

And for any one esle reading this then yes the needle jet is the little silver tube that site in before the main jet. The longer end should go in first. It won't seem like it fits but trust meit will. You just need to get it lined up right. Easy was is to take the slide out the carb and look into the to of the carb wile you use the needle to alline it. This way you can see the jet and the hole.
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  #29  
Old 16th May 2012
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Kinch Kinch is offline
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Sportster/Buell Model: Sportster 1200 Custom
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No worries, it pointed me to the problem and I needed to clean the carb anyway so all is good! Rode it around the hood today and it rides great.

Since it's been sitting for so long I'm going to drop it off at my local Harley Shop to give it a once over and make sure all's safe and then it's time to tear up the road. Cannot wait.
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  #30  
Old 29th September 2012
hdnew96 hdnew96 is offline
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Sportster/Buell Model: 96 sportster 1200 custom
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Awsome thread, veary helpful guys, good job!!
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