Poor running after fix!!

[DesmoTillDeath]

So the salami sizzler is not performing on par with what it should. A few weeks ago it was popping pretty bad under any engine braking and not pulling as much as it should.

Recently done:
-CO adjustment at Southern Cal Motorcycles and they said that it was running alittle rich still and they couldnt adjust it out. (recommended loose closing valves, exhaust side. Or loose valve guide.)
-I did valve adjustment to .000" or .002" on closing for all valves and left opening at high end of spec (assumption that gap closes as valve stretches with time/use).

Now it still pops and feels sluggish.
I checked compression on a cold engine:
-60psi Horizontal
-90psi Vertical

Anyone know what else I should check?
Whats the average price for a head rebuild? If I take the heads off myself? If I buy the valves myself?
ME thinks $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

[ducpainter]

Are those numbers with the throttle held open?

If so, it's definitely low compression.

A leak down test would pinpoint whether it was valves or rings.

Do you have a way to put compressed air into the cylinder?

[DAYS OF GLORY PAST]

Even if the throttle was shut , and lets hope it was , the readings should have been closer to each other to be within spec

[DAYS OF GLORY PAST]

Are those numbers with the throttle held open?

If so, it's definitely low compression.

A leak down test would pinpoint whether it was valves or rings.

Do you have a way to put compressed air into the cylinder?           

+1

[Howie]

Also, was the engine warm?

[ducpainter]

Also, was the engine warm?

He stated cold.

[DesmoTillDeath]

Throttle closed (untouched)
No oil added to cylinder
Cold (Thanks for noticing  )

I can pressurize the cylinder yes. How would I read if it leaks from the valves or the cylinder by doing so? I agree i will be able to see leakage but to pin-point the source??

[ducpainter]

Throttle closed (untouched)
No oil added to cylinder
Cold (Thanks for noticing  )

I can pressurize the cylinder yes. How would I read if it leaks from the valves or the cylinder by doing so? I agree i will be able to see leakage but to pin-point the source??

Re-test compression holding the throttle wide open. Results would ideally be within 10% of each other.

Listen for air leakage in the exhaust, the carbs, or the crankcase vent/oil filler.

First two would be valves...last would be rings.

There is a standard for leakdown ...I don't know the value.

[Howie]

Ideally the engine should be warm too.  Piston fit is off on a cold engine. 

[DesmoTillDeath]

ok tested it within 5 min after a 15 minute ride.

Vert: 105 psi
Horiz: 90-95 psi

I guess the leak-down test is next. Although those numbers arnt terrible.

[ducpainter]

ok tested it within 5 min after a 15 minute ride.

Vert: 105 psi
Horiz: 90-95 psi

I guess the leak-down test is next. Although those numbers arnt terrible.

They're kinda low IMO.

[DesmoTillDeath]

Did the leak-down on a cold engine at TDC compression stroke.

At 90 psi air bellowed out of the exhaust and the airbox.

I ride her everyday and despite the intermittent poor running/good running, it is on average decreasing in "get up" and performance.
Are new guides the only possible solution?
How difficult is it to do this in the garage?

[Speeddog]

How many miles on the engine?

[DesmoTillDeath]

29,000 

[ducpainter]

Nick will correct me if I'm wrong, but if air is blowing out the exhaust and the airbox then the valves are not seating resulting in low compression.

Did you pull the oil filler, or the hose from the breather, and see if any was coming from there? That would indicate bad rings.

It needs a valve job at the least, and possibly guides in conjunction. Without some expensive equipment it isn't a DIY job.