Question about 2000 Harley Davidson XL 1200 C Sportster Custom

14 Answers

2003 sportster wont start or run right when it is warmed up

2003 sportster
new 1200 kit, same problem befor kit was put on
carb just rebuilt, same problem befor rebuild
starts and runs fine cold then runs like **** once its hot, pops on decelleration
runs like its out of gass
no smell of gass when it wont start

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  • Itamar Hacohen
    Itamar Hacohen Jan 06, 2014

    have you tried changing the spark plugs?

  • Jeff
    Jeff Sep 07, 2014

    You are running lean, carbs were not cleaned properly ...

  • John Harris
    John Harris Oct 06, 2014

    I'd bet on Jeff's answer.

  • Rev Randy
    Rev Randy Oct 25, 2014

    running lean , check manifold seal

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14 Answers

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Hey dude, did you have trying on intake pipe leak ...spray any carb cleaner on the manifold intake....any change would be an air leak....
Voila.Thkx.

Posted on Oct 05, 2014

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There is not enough information. Start with the simple first by looking for vacume leaks John has already done a great job describing that process. Once you can establish the problem is not mechanical then start looking at electronics and wiring. In the past I found a lot of interesting problems were solved by removing grounds, cleaning the surfaces of corrosion and remounting the grounds and using a heavy grease on top of that connection. If the connection gets hot use anti.seize grease. Use any grease sparingly avoid making a mess later due to too much grease dripping hot at speed.

Posted on Oct 01, 2014

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  • Harley Davidson Master
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Well, what is it a 2000 or a 2003, obviously not a 1200S so no codes available. When it runs cold is that with or without the enrichment circuit (choke) active?? Is the float level set right? Is the carb diaphragm okay or has it got a hole in it?? It is running very lean when hot as evidenced by the popping on deceleration. Does it run better when hot with the enricher somewhat activated?? What if you spray some fuel into the intake when it is hot and not running well??? Check for downstream from the carb induction system air leaks when hot by spraying, very carefully, WD40 or such all over the induction system seals etc. and watch for an increase in rpm etc. There is no cam position sensor on this bike but 2003 has an ignition module which does cam position sensor functions. Is the timing correct, not likely the problem but ..... If there is no intake leak, the carb is all okay and the float level which is critical is correct, check out the VOES (vacuum operated electrical switch) which switches between two ignition timing settings depending on engine running conditions. Of course motorcycle spark plugs are also critical and a good looking plug may not be good in fact and may break down when hot and under combustion pressure so be sure the plugs are good (just having a spark apparent under no compression pressure is not a good or complete indication of a good plug). It is more likely an enleanment problem than a plug problem though from the symptoms. Also assuming the air filter is good and not plugged which would greatly contribute to/exacerbate problems.


John

Posted on Aug 23, 2014

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Sounds like the cam position sensor.

Posted on May 20, 2009

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Check exhausts if black or sooty exit then sounds like mix is too rich. That being the case, problem wont be air leaks as that would cause too lean a mix.

Posted on Jan 11, 2016

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  • Harley Davidson Master
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Hi, Katie and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
For more information about your issue, please visit the websites below, and for specific information or questions please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
Harley Davidson Manuals Mark Workshop

Posted on Nov 11, 2015

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I'd say put that fuel injected piece of **** in the garbage, and go buy a used 1982 on eBay :)

ask me about carburators bro

Posted on Nov 11, 2015

  • jamesdelab1
    jamesdelab1 Nov 11, 2015

    I'm just being silly. you da man

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  • Master
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Carb need a cleaning

Posted on Mar 10, 2015

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  • 24 Answers

Jets might need adjusting , to much fuel, to much air not enough of either. Float bowl is stuck, air leak . Check the plug

Posted on Mar 04, 2015

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When they rebuilt the engine was your carb rejetted it should have been done also in the exhaust are they using power cones if so use should not be using baffles with them one or the other you take your chances with no baffles on tickets check the carb jetting first

Posted on Nov 09, 2014

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Just in case you haven't had your valves adjusted in a while that could give the symptoms you describe.
Another thing to check is your fuel jets, drop the bowl out and unscrew the jets, blow them out with compressed air.
If the bike runs okay with the choke on, but does not run right once the choke is off, your jets are dirty/partially plugged.
You should also check that your plug wires are in good condition, and have not developed areas where the insulation is worn, allowing the spark to arc to whatever is closest.
If all else fails run a compression check on the bike, you could have a carbon buildup, or a valve seat/valve getting a little iffy.
You may also want to check that the carb fasteners are properly torqued down, and that the carb gasket is good.
I ride a 65 Pan(ex Kansas city police bike, standard transmission), and a 53 Indian Chief(also a standard), the pan once had a problem with corrosion under the bolt that holds the battery box ground wire to the frame, that can cause all sorts of problems, from not keeping the battery charged to not getting enough juice to the plugs, to (very) hard starts(the 65 was the first pan with an electric starter), and cutting out at speed, backfiring, not idling, it was like El Diablo was messing with me.
I went to the tool box instead of a priest, but a priest with a tool box would have been cool.
The Indian was bought as a not running, Honda shop "mechanic" says can't fix it, bargain back in 71, it had a tank full of water and rust, cleaned the tank and everything including rebuilding the carb, and shazam! First kick, and she's ready to go for a ride.
Check all the stuff John #1 told you(he's real good on this later model stuff), if it doesn't help, check those valves (and compression).
Good Luck and remember, car drivers can't see you, and if they could they'd try to kill you.
One last thing, 70% of the stopping power of your bike is on the front wheel, I don't know how advanced of a rider you are, but practice braking HARD with your front brake.
An easy way to get used to the front wheel being locked up, is on a dirt road at low speed roll on the throttle (barely) and lock the front brake, sliding the tire, this will give you the confidence you need when you have to make an emergency stop.
Also, learn about counter steering(if you don't already know about it). Over 12 miles per hour, if you want to go left gently nudge your handlebars to the right, it'll bank to the left like an F-14.
I'm sure you know all this, but hey, on the outside chance you don't, take it from an old racer, it works, and it can save your life, and I figure you are worth keeping around a while.
All the best, and good luck!
John (Sparky)

Posted on Oct 06, 2014

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Have you changed the Ex. pipes, if you have it can cause these problems, needs a richer setting for carb.
Could be this simple.

Posted on Sep 28, 2014

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This may or may not be the same as mine, but I have an 03 XLH 883 and it comes to find out that the Ignition location and componeets is a lot different in most models. Finding parts and information has been a travesty at best. First thing is, everyone uses a different name for the same thing. On my model as it turns out, the Crank/ Cam Positioning Sensor is the same as the Ignition Module. On other Bikes it is mounted elsewhere. From all the reading and searching I have done, each of the symptoms are slightly different, as well as components mounted in different locations. unfortunaly there is alot of confusion on this topic even though it seems like it is fairly common. the new module was quite difficult to locate and replace. PLus the directions/ wiring are quite vague and cloudy. The first Module has 5 wires but the new one only has 2. It is not clear which wire goes to which side of the coil, so be careful when you hook it up...

Posted on Jun 08, 2009

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I'm sorry, I can't help because I own a Suzuki. Oh, wait...that would fix it!!

Posted on Feb 10, 2015

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2003 harley 1200 custom sportster with 50 miles strats up fine with choke pulled out. once engine is warm and choke is pushed in 50% bike stalls out. have repalaced gas, spark plugs and just took apart...


A 2003 model with only 50 miles?? Wow....well,since youve already taken the carb apart and cleaned it,did you hook up the vaccum line for the VOES switch on the intake manifold? If so,..when you get the bike running,..spray some brake clean around the intake where it bolts to the heads.If the idle picks up,or starts to sputter,..youve got leaking intake gaskets. Which is a good possibility on a bike that old with that few miles on it.The choke essentailly adds more fuel to the motor,and by what your saying,the bike is obviously running lean. Also,...im ASSUMING that you have fresh gas in it,and the petcock is turned on.

Sep 25, 2012 | 2003 Harley Davidson XL 1200 C Sportster...

1 Answer

2003 harley 1200 sportster won't start when warm tuns over no spark just changed coil no difference starts right away when cold


Hi Curtis, the CKP sensor needs compression to send correct signal to the ICM/ECM, make sure both spark plugs are in heads and use a grounded third plug to check for spark or hold spark plug cable close to spark plug in head. If still not getting spark the usual suspects are:
1. Fouled spark plugs.
2. Battery voltage below 8.7 volts, loose or broken battery cables especially ground cable to frame.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, MAP or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm.
For a prime suspect please visit the website below and good luck.
Harley Davidson Sportster error codes and how to access them

May 06, 2012 | 2003 Harley Davidson XL 1200 C Sportster...

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Runs then sputters and wont start


you might need to clean you stator(altinator) or maybe get a new one for you spark to work right if you have already changed the coil.also bad gas can do it also or low fuel.when the tank is low put your bike gas valve on reserve.A friends bike was running badly and all i did was put it on reserve cause the tank was low and the bike ran great after that.

Jul 01, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

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When my engine is hot the engine stop


sounds to me like the ignition module on the right side of the motor is breaking down when it gets hot easy way to tell for sure is to heat the area around the right side of the motor where the little timer cover is. after getting it good and warm with a heat gun then try to start the bike if it wont start then you know you have a faulty ignition module at the sensor plate its self. Good luck and thanks for using Fixya.com

May 20, 2010 | 2003 Harley Davidson XL 1200 C Sportster...

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May 17, 2010 | 2000 Harley Davidson XL 1200 S Sportster...

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Apr 20, 2010 | 2004 Harley Davidson XL 1200 C Sportster...

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What fuel and (oil does) 2003 sportster a XL1200C take?


You need engine oil, usually 20 W 50, and primary case oil, 50 weight.
Depends on your Climate. Cold, you can use thinner oil.
You can buy from a Harley Dealer, Genuine brand Harley Davidson Oil.

Apr 17, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

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Once the engine warms up it shuts down. there is some backfiring every once in a while to. We have rebuilt the carb, replaced the pet **** and replaced the tank. Any suggestions on what to check next?


You rebuilt the carb so I'm guessing the backfire comes from the pipes.Check the ign system/distributer.Advance plate, condenser stuff like that.Advance spring might be broke.Oh yeh,the coil since it warms up before stuff happens.

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2003 Harley Davidson XL 1200 C Sportster It starts and runs perfect when cold.When it warms up to 150 degrees at wide open acts like it is running out fuel,At 180 does it at half throttle and above,At 190...


That's a strange one. The only things I can think of suggesting are:
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  • Moisture trapped in float bowl. Drain the contents on the carburetor float bowl into a clean container and check for dirt, rust, water, or anything else that doesn't belong there.
  • Dirty fuel filter. If there is one, replace it.
  • Air leak between carb and engine. Check tightness of clamps and manifolds for cracking. WD-40 sprayed around those areas with the engine idling will help detect any leaks.
That's all I can think of. Please let me know if any of my suggestions fixed it.

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1 Answer

Power loss after warm up


Most certaintly a fuel problem. It sounds to me like you might have a high speed jet a little stopped up. I would pull the carb and clean the jets. If the fuel is a little old, and I do mean a little, and the bike sat a little bit, the carbs probably a little varnished. The gasoline we have no days aint nowhere near what it use to be. Clean carb and all should be well. Also for future referance if you know your gonna let the fuel sit more than a couple weeks, I would use a fuel stabilizer and run the bike a while to make sure the stablelizer gets in the carb.

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