Question about 2000 Harley Davidson XL 1200 C Sportster Custom

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Depending on the age/mileage and how it is/has been driven I would say anywhere from about 100 to 140 PSI. The big thing is not a great difference between the two cylinders. Anything lower and there is wear etc. and anything higher and the engine carboned up.

Posted on Oct 16, 2014


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Posted on Jan 02, 2017

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SOURCE: How much cylinder compression should my XL 1200 C

120 psi.+- 10% Do both a "wet" and a "dry" test.

Good Luck

Posted on Sep 06, 2010

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What should the compression be on a 1977 115 hp evinrude

Russ, not sure on factory compression, forums say motor should be good if running 100+, more important is to be with in 10% from highest reading to lowest compression reading. Balance is a key part for engine to run good. Check the attached links,instruction and guides, Good luck
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I changed the stock coil to a screamin eagle H-performance coil, new spark plugs,new plug wires on my 1998 hearley davidson 1200 sportster. Now it don't run right.

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1977 ironhead is backfiring on cylinder one on low revs but cylinder2 seems 2 be running ok is this a carby problem or maybe a valve problem?

It could be either. On an Ironhead, you have solid tappets. I'd adjust the tappets first. If you have a valve standing open even the slightest bit, you're compression will be lowered and a misfire will result. I'd also change the "rubber bands" on the intake. They don't cost much even if you purchase the rubber band seals with new clamps.

Another source of problems in the old Ironheads is the mechanical centrifigal advance unit in the timer cover. Mark the breaker plate and take it out to check the advance unit. If it's worn, it will not allow the timing to fully ****** at low speed and cause the problem you're talking about. Make sure the pivot pins for the flyweights is not worn out. If you replace it, I'd advise you purchase the "roller bearing" advance unit. They'll last much longer with less maintenance.

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How much cylinder compression should my XL 1200 C run?

120 psi.+- 10% Do both a "wet" and a "dry" test.

Good Luck

Sep 06, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

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Hi Ray_ron, for more information about your question please visit the website below. Good luck and have a nice day.
Owner Manuals Harley Davidson USA

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Have you done a compression test on it. Try that. It also could be a valve, electrical or fuel problem.

Mar 13, 2009 | 2000 Harley Davidson XL 1200 C Sportster...

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