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1984 HARLEY SPORTSTER XLX 1000 FRONT CYLINDER DOES NOT FIRE HAS COMPRESSION ,FUEL AND SPARK

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  • Harley Davidson Master
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Hi Anonymous, question asked and answered. Thank you

Posted on May 15, 2015

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Posted on Jan 02, 2017

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SOURCE: 1985 harley 1000 no compression in front head

remove the push rod tubee on the front jug.see if the pushrods are moving up and down.see if they are loose.if loose adjust try again.
your valves may be stuck open if not stuck open pour 1 once of mystery oil in head try comp test again.[this is to check the rings}if still no comp you have a hole in your piston or blown head gasket

Posted on Aug 07, 2009

wd4ity
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SOURCE: diagram for 1984 harley sportster

contact me directly and I can scan a parts diagram for you
wd4ity @ bellsouth.net

Posted on Sep 23, 2009

wd4ity
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SOURCE: harley davidson xlx 1984 Sportster

Most of the rebuild kits for that carb come with all the gaskets, an accelerator diaphragm, and a float needle valve. The seat is not replaceable.

Good luck
Steve

Posted on Sep 07, 2011

  • 1 Answer

SOURCE: I have a 1984 Harley iron head sportster and I'm

itss your ignition module ..its toast the black box it cheaper to get the wwhole ignition kit on ebay about 160

Posted on May 02, 2012

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SOURCE: 1200 sportster not running on back cylinder

Verify the cylinder is not firing by measuring the temperature on the exhaust right out of the cylinder. If it is not firing the tempature will be much cooler than the front cylinder. Once you have determined the rear cylinder is not firing then you need to perform a compression test on the rear cylinder. If it is not with in specifications, you may have broken rings, burned valves or hole in piston. Until you run compression test you will not know which way to go.

Posted on Apr 05, 2013

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Related Questions:

1 Answer

1974 1000 sporty, front cyl doesn't fire


Did you check the Ignition, Points and Condenser. Also check compression there may be a stuck valve.

Jun 18, 2014 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

NOT firing out of front cylinder have new plugs new coil new wires


Hi Anonymous, check compression and do a leakdown test could have bent valve, also check all pin connections at ignition module. Please visit website below for more suspects:
Harley Davidson Sportster error codes and how to access them
Good luck

Feb 16, 2014 | 2002 Harley Davidson XL 1200 S Sportster...

1 Answer

1984 HARLEY XLX 1000 FRONT CYLINDER DOES NOT FIRE ,HAS COMPRESSION ,FUEL AND SPARK


Hi Anonymous, if you have all that then your cam timing is off or your timing sensor is faulty. Good luck

Jan 02, 2014 | Harley Davidson XLH 1000 Sportster...

1 Answer

1984 HARLEY XLX 1000 FRONT CYLINDER DOES NOT FIRE HAS COMPRESSION ,FUEL AND SPARK


Hi anonymous, see previous last 2 questions and answers. Thank you

Jan 02, 2014 | Harley Davidson Motorcycles

1 Answer

1200 sportster not running on back cylinder


Verify the cylinder is not firing by measuring the temperature on the exhaust right out of the cylinder. If it is not firing the tempature will be much cooler than the front cylinder. Once you have determined the rear cylinder is not firing then you need to perform a compression test on the rear cylinder. If it is not with in specifications, you may have broken rings, burned valves or hole in piston. Until you run compression test you will not know which way to go.

Apr 05, 2013 | Harley Davidson XL 1200 C Sportster Custom...

1 Answer

I have a 1984 Harley iron head sportster and I'm


itss your ignition module ..its toast the black box it cheaper to get the wwhole ignition kit on ebay about 160

Dec 02, 2011 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

My front cylinder is not firing. I replaced plugs


hi you must check compression first should be same as other cyl. if not check for tight tappet if ok is the plug sparking if you hold it against cyl and turn over motor if good spark put it back and turn over motor few times then remove it and see if its wet with fuel if its not could be carby blocked jet

May 25, 2010 | 2004 Harley Davidson XL 1200 C Sportster...

1 Answer

2010 sportster 48edition,rear cylinder missfires at iddle with 1600 hydrocarbons reading and front at 200 hydrocarbons.Is the 1200cc sportster engine known to have this kind of problems?


No, Harley Sportster engine is the best engine Harley ever built in my opinion. If your engine is fuel injected, I'm afraid you'll have to take it to the dealer to find the problem. If it's carbureted, you may can fix it yourself if you can find the problem.

The engine needs three things to run, compression, fuel, and spark. Since it's a 2010 model, it's new and the compression should be good but just in case, a quick compression test should be done. Average compression should be about 120 pounds per square inch.

Next, you must have fuel. With a hydrocarbon reading of 1600, I'd suspect that your getting fuel to the cylinder. Matter of fact, it may be too rich. Check your intake manifold for vacuum leaks. If your bike is fuel injected, you'll have to take it back to the dealer for service. There is no way a carburetor can cause this, it's got to be a vacuum leak if it's too rich on one cylinder and correct on the other.

Finally, you need spark. I would guess this is your problem. If the fuel is not ignited, you get a "missfire". Try removing your spark plug wires and install another set of plugs in them. Leave your original spark plugs in the heads. Spin the engine with the starter and watch the spark. If the spark looks good, install the new set of plugs in your engine and try that. If not, you need to check the output of your coil.

Apr 08, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

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