Question about 2000 Harley Davidson FXST Softail Standard

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Rear cylinder has no compression then all the sudden 1 cycle compresson is there then gone again. I took the valve cover and push rod covers off. the lifters, push rods, rocker arms and valves seem to be operating properly. Engine only has 12,500 miles on it and all services were done on schedule.Getting ready to pull the rocker arms and head off, if I don't figure whats wrong soon.

Posted by Anonymous on

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  • Harley Davidson Master
  • 43,836 Answers

Hi Anonymous, try a different compression gauge or tighten the schrader valve on yours. Good luck

Posted on May 17, 2015

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Posted on Jan 02, 2017

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SOURCE: no iol to top end

Sounds like a air leak somewhere to me

Posted on Jun 21, 2009

  • 269 Answers

SOURCE: engine noise

If you dd not torque the front sprocket down correctly you could have an issue. If this is a new noise then be concerned, if this has progressed over time, then it is more than likely just the bike loosening up. Which is normal...but loud, could this be pre-detonation, did you make the correct adjustments to your MAP? Check you push rod adjustment with the bike cold, I mean Artic overnight not running cold.

Posted on Oct 07, 2009

  • 221 Answers

SOURCE: push rod cover installation

What they mean by the base is the base circle of the cam.So at TDCC you are at base with little pressure on the rockers,so they can be removed.So if you have only removed the covers there is no need for anything except to put your cover back on.

Posted on Mar 19, 2010

Testimonial: "Exactly what I needed to know. It was broken down to very simple tems. Thanks a ton"

wd4ity
  • 4565 Answers

SOURCE: I have the rocker boxes

Your engine is on the compression stroke when the piston is at it's highest point in the cylinder with both valves closed. As you turn the engine over. you will see one pushrod go up (exhaust stroke) and back down the the other pushrod will go up (intake stroke) and back down. Now the engine is on the compression stroke and TDC is when the piston comes to the top of its travel. The piston is at the top and both valves at the spring are not compressed. When the spring is NOT compressed, the valve is closed. On the compression stroke, both valves must be closed.

Good Luck
Steve

Posted on Sep 09, 2011

Testimonial: "Thank You for your promp answer, the problem was that I didn't have the rocker arms on so I wasn't able to watch the springs, only the push rods."

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hi there

pauly46 here

if engine seems to labour when trying to start as if too much compression ?

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