NEED HELP. Starts (sometimes) but dies when I apply throttle

[Guest]

If the eye is black, the engine case is filled with oil
The oil filter housing does not drain the oil
You need to remove the oil drain bolt on the bottom of the engine
You should drain all of the oil from the engine and refill with the correct amount

Refilled to the correct amount but still oil fowling the right side. Starts, runs for a few seconds and dies, won't start back up until I wipe off the oil. Why would this happen?

[Big T]

Valve stem oils seals are bad

[Guest]

Valve stem oils seals are bad

Any direction of a thread that may help me fix this. I know nothing about that but am willing to learn!

[Rich82GS750TZ]

Valve stem oils seals are bad

Could failed rings in that cylinder cause the spark plug oil fouling as well? I'm asking 'cause I don't know. Just a thought I had.

[Big T]

Failed rings are possible, a compression test should confirm that
Also, could just be a build up of oil from the overfill

[Guest]

Failed rings are possible, a compression test should confirm that
Also, could just be a build up of oil from the overfill

I don't have a compression tester but once saw that ilit should be enough pressure to blow my finger away if I cover the hole after I remove the spark plugs and both sides certainly do that... If I can get my hands on a tester I'll do that but in the mean time, what can be done about an oil buildup? Or should I plan on taking apart the top of the engine anyways...?

[Guest]

I don't have a compression tester but once saw that ilit should be enough pressure to blow my finger away if I cover the hole after I remove the spark plugs and both sides certainly do that... If I can get my hands on a tester I'll do that but in the mean time, what can be done about an oil buildup? Or should I plan on taking apart the top of the engine anyways...?

Got a compression tester. Will check and respond this afternoon... What should I expect?

[Big T]

Test with motor warmed up, throttle wide open
150 lbs

[Guest]

Test with motor warmed up, throttle wide open
150 lbs

I can only check it when it's idolate because of whatever condition I'm having whenever I apply any throttle it chokes and dies

[Rich82GS750TZ]

I can only check it when it's idolate because of whatever condition I'm having whenever I apply any throttle it chokes and dies

That's fine, not to put words in his mouth, but Big T meant for you to run the engine for a while to get it warm and circulate. Then SHUT THE ENGINE OFF. Then remove your spark plugs and install your Compression Tester Connections in the spark plug hole. Then With the throttle twisted all the way open, do the compression testing.

[Big T]

Exactly, thanks Rich

[Guest]

Thanks Rich and Big T! Ran my compression test as indicted below, left side gets 170 PSI and the right gets 175 PSI. Still oil fowling the right side after I had the plugs in and let the engine warm up

[Big T]

So, not the rings
Did you clean the airbox and check the air filter after the oiling issue?

[Rich82GS750TZ]

Big T, if oil on the right cylinder plug isn’t coming from below(rings) then must be coming from above? Does this mean a valve seal change is in order?

Jonathan, can you put your bike year and model in a signature? I keep forgetting what bike we’re talking about.

[Guest]

1978 Suzuki GS400