Too much compression

[ldfly112]

My 1961 FLH 3000 miles on a fresh top end last few times I rode it the compression has increased quite bit. I am topping the scale at over 230 lbs. and struggle to kick it over when hot and not much better when cold. Any ideas what has changed Thanks if you can help

[dukekleman]

Can you give a description of the build you had done. Cylinder head work performed and parts used. Piston brand and part number. Camshaft being used.
Identification of these parts are relative to static compression ratio. If you know of cylinder head gasket machine work being done or cylinder gasket surface and/or base gasket surface please acknowledge.
230 PSI @ kicking RPM is really high for a 74 cubic inch Panhead. What brand compression gauge tester are you using?
Does this engine have factory hydraulic lifters in it?
Let's start here with getting to the bottom of your problem.

[T. Cotten]

Measuring the compression would certainly be a clue, Idfly...

Usually problems go the other way!

Please beware there are many mechanical issues that can put a bind on other things than the motor, usually in the primary.

...Cotten

[dukekleman]

I believe I interpreted your message wrong???
I thought you meant that you measured your cranking pressure at 230 lbs. With a compression gauge. After reading Cottons comment, your referring to your body weight???
Either way, please supply information so the situation can be accessed and the issue diagnosed.

[T. Cotten]

Does it turn through easily with the plugs out, Idfly?

....Cotten

[ldfly112]

Yes it turns over easily with plugs out starts first kick after 2 prime kicks only after the engine heats up it becomes very hard to kick over

[T. Cotten]

But when hot, its still free and easy with the plugs out, Idfly?

If something's getting tight, you want to find it!

...Cotten

[jruff]

I believe I interpreted your message wrong???
I thought you meant that you measured your cranking pressure at 230 lbs. With a compression gauge. After reading Cottons comment, your referring to your body weight???
Either way, please supply information so the situation can be accessed and the issue diagnosed.

Ok I find this quite funny. I'm not making fun of anyone. I am dyslexic and I read this when it was first posted and thought this sounds like a load of BS. I. just checked to see what the problem might be and read this (your referring to your body weight?) then I had to read the original post TWICE. It made me laugh. BTW what octane do you need for 230 lbs compression

[dukekleman]

In this case, on a Panhead, who knows?
On Twin Cam and M8's @ 215 cranking, ACR's deactivated of course, 91-93 octane.