First real motorcycle. New rider. Oil leak issue XJ 650 82

[JCT88]

Did the compression test and here where the numbers

140
150
145
140

How do i check to see if gas in the crankcase?

[tarzan]

Those numbers look good.
Put a stick in the oil filler hole and get some oil on it.Pull it out and smell it.If you cant tell,step back from the bike and try and light the stick on fire.If it has gas in it the stick will ignite quickly.HTH.
Rick

[JCT88]

Ok tried it. Didn't light up quickly, took about 3 seconds or a little more.