It runs!!!! BUT!

He stated 90 lbs at the mid way point but dang 60 is really low.

A leak-down test could help identify where compression is being lost.


A leak-down test injects air pressure through the spark plug hole to pressurize the combustion chamber.

Can perform a poor-man's leak-down test by introducing compressed air into a spark plug hole and listening to where it escapes from the combustion clamber. This may be done at TDC or any other cam positions where both valves are fully closed. Top dead center (TDC) is when the piston is at its highest position. An easy way to tell TDC is by alignment of the T mark with the case mark when viewed through the timing window.

May introduce a spurt of compressed air by using a rubber cone-tip blow gun (rubber air nozzle) held into the spark plug hole. And of course keep holding it in position to keep air from coming back out the spark plug hole while listening for escaping air at other places. The air compressor should not be running while listening because the noise will likely drown out any sound of escaping air. Or just use a portable compressed air tank.

Air heard escaping from exhaust port indicates exhaust valve not fully closing (perhaps too tight clearance or damaged valve or valve seat).

Air heard escaping from carb intake indicates intake valve not fully closing (perhaps too tight clearance or damaged valve or valve seat).

Air heard escaping from crankcase breather indicates loss of compression past rings into crankcase (perhaps worn piston rings or cylinders).

Air heard escaping from head gasket area indicates loss of compression past head gasket (perhaps due to a blown head gasket).

A leaking valve may sometimes be resolved by adjusting the clearance to within specs.

A leaking head gasket may sometimes be resolved by torquing the head fasteners when the engine is stone cold (such as after sitting overnight).

Good Fortune!

Check the cam timing before tear down.
Steve

One step at a time. This is my advancer. Times correctly right?

For cam timing, the next one is for ignition.
Steve

Hold up! Motor has been sitting, compression is even at 60psi across the board then in a ifferent post it's 90psi?!? Stop, check your timing, reclean the damn carbs (use a wire from a bread tie or something to make sure all passages are open,)and use a known good battery hooked up with the shortest fattest wires you can hook up and just get it running.

If the motor isnt locked the rings may be sticking, get her going and put a little MMO or atf in the gas, just a little and run thru a half tank or so in the backyard and try again, they will run with low compression, even fresh motors have low comp.

I've been through the carbs but I will pull them again. I'm gonna pull valve cover and verify cam timing. I have a brand new battery. Maybe put a little mmo in cylinders to try and free rings that are maybe sticking. Thinking about while I have valve cover off doing a leak down test and then it should be really easy to see where air is escaping. Also when I got my 60psi reading I did not have all plugs out. Not sure if that will make a difference I just know the manual says pull all plugs.

Have the bike home and in my garage now so hopefully I will have more time to pick at it!

So why didn't you pull all the plugs? I suggested cam timing 4 days ago. Don't put oil or anything in the cylinders. You'll just foul the plugs and have another problem. You can try starting fluid or carb spray to get it to fire.
It gets to a point where I feel like saying, just jack up the head light and change the motorcycle.
Steve

I had the bike at a friends house I only got to work on it about once a week.

I suspect if you get it running, the compression will come up. Pics of plugs? Check the cam timing, for spark etc? Even compression tells me the valves may still be good. One thing at a time.
Steve

Ok here is the advancer

Here are the cams

Cylinder 1 both valves closed
Cylinder 2 intake open ex closed
Cylinder 3 intake closed ex opening
Cylinder 4 intake closed ex opening
1&4 at TDC
Looks like my ex cam is a little high and my intake a little low