Road King 80ci compression values

[Sport40]

Hello guys,

Today I checked the cylinders compression values.
I recorded about 140 psi on each cylinder.
But the overhaul manuel (Clymer) says that the standard value is 90 psi.

The engine had 120 000 kilometers no leak and no smoke.

What do you think ?

Thank you :worthy

 

[glider]

90 lbs compression is time to rebuild. You're OK with 140 if it was done right.

 

[Sport40]

Thank you Glider.

I understand, 90psi is the minimum record value before rebuildiing ?

 

[glider]

Compression is what gives the engine the power. When you are low on compression the engine has no get up and go. Most times when you get below say 100 lbs, it's time for a rebuild but an accurate compression test should be done first with the throttle open and the slide in the carb lifted for best results.

 

[Sport40]

Of course.

I followed this procedure: Harley Davidson Community

:s

So, I think now that 140 psi is a good pressure to ride still many miles :rider

 

[glider]

I wouldn't give it another thought at 140 lbs. For a 98 bike, it's good.

 

[Sport40]

Thank you very much, I can ride quiet now.

 

[Jack Klarich]

Thank you very much, I can ride quiet now.

Equal pressure in the cylinders is always a good thing I say ride it some more miles and check the compression each time you pull the plugs:s

 

[nitroracer]

as jack said,equal pressure is almost more important than the number itself.for a stock evo,140 is fine,but also look at oil comsumtion,and general running of bike to let you know when internal work may be needed

 

[Sport40]

Thank you everybody.

This winter I remove and change only the cam shaft with his bearing and pushrods.

I replace the actuel cam shaft with an Andrews EV27.:small3d006:

Cylinders will wait a few miles :s