Question about 2005 Harley Davidson XL 883C Sportster Custom
Engine turns over good with electric start but has no spark. if you pop the clutch , however, it will run
Hi Tavi904, if you have a CKP sensor it 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. Good luck and have nice day.
Set Change Override Transport Harley Security Alarm PIN Code No Key Fob...
Harley Davidson Sportster error codes and how to access them
Posted on Jun 23, 2015
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Posted on Jan 02, 2017
SOURCE: Loud Downshift
By "loud" I assume you are talking about the "clunk" when you engage a lower (or higher) gear. Does the bike try to creep forward when you are in gear with the clutch disengaged? If it does, then you need to adjust the clutch cable. If you have one of those bogus braided cables, then the adjustment is something you much watch very closely. Forgive me, but if you are shifting down at to high a speed, you are going to hear some loud clunks as the gears are turning at very different speeds. The trans on your bike is a very well designed item and noise when shifting most likely does not mean problems.
Posted on Dec 31, 2008
Neg cable corroded thru.
I bet you have 12v at the battery and less at the other end of the neg cable.
I had the same problem.
Posted on May 02, 2009
harley recomends that you use their oil but i would be carefull because it is a cynthetic now if you were using regular oil what that will do is clean all the old build up out of the motor this can be bad because after time there are pin hole leaks that occure but the build up stops it from leaking but if you use cynthetic you cant go back to regular oil it will gum up on you and ruen your motor so you got to find out what has been put in it. but use a 10-30
Posted on Jun 05, 2009
Your Twin Cam plug should be a 6R 12 Harley Plug. Often times the back fire is just the nature of the beast depending on what type of pipes you are running. Harleys do run lean, its an EPA thing thtas why they choke them down from the factory. Since you have a carb you could have an intake leak around the Intake. Also Under the carb is an adjustment screw. Harley plugs it up so people don't play with it. You have to just drill out the plug this will set your air fuel. Whenever I take a carb off I drill out that plug. Heat your bike up operating temp and ear tune that screw. Only other way is with air fuel analizer or a dyno. good luck.also that backfire is caused by fuel hitting your exhaust when you let off just to let you know.
Posted on Jun 15, 2009
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