KZ1000E compression, help!

Went to check out a KZ1000st i've been looking at today, didn't get a good chance to check out the engine as the guy had left the vac petcock on prime and flooded the whole engine with gas...

First question, should the gas have been able to get into the oil like it did? (gas/oil was coming out of the oil breather overflow) Does the fact that it did mean that there are rings gone in one cylinder?

Second question, I was only able to get in at cylinders 1 & 4 with my comp gauge as i didn't take the tank off, 1 & 4 both read about 115-120 psi. Is this an acceptable psi? If I test the other two and get the same result is that a good psi?

Thanks!

that's good for washed down cylinders.pull the tank and squirt a little oil in each one and retest

KZ250LTD wrote:

Went to check out a KZ1000st i've been looking at today, didn't get a good chance to check out the engine as the guy had left the vac petcock on prime and flooded the whole engine with gas...First question, should the gas have been able to get into the oil like it did? (gas/oil was coming out of the oil breather overflow) Does the fact that it did mean that there are rings gone in one cylinder?....

Where floatvalves are for whatever reason failing to stop fuel flow into bowl, and overflow circuit where exists isn't allowing excess fuel to escape, the excess fuel rises up into the carb throat and flows both ways, back toward the airbox, and forward toward the engine combustion chamber.

Fuel inside the airbox readily drains directly into the crankcase through the rubber hose connection between airbox and crankcase breather.

Fuel inside the combustion chamber drains down around the pistons and into the crankcase. Which happens regardless of perfect pistons, rings, and bores.

Needless to say, would correct the carbs and change oil and filter before again starting the engine.

Good Luck!

KZ250LTD wrote:

Second question, I was only able to get in at cylinders 1 & 4 with my comp gauge as i didn't take the tank off, 1 & 4 both read about 115-120 psi. Is this an acceptable psi? If I test the other two and get the same result is that a good psi?

That's pretty bad. Make sure you read it with the throttle held wide open.