ASAP Please Help..... Alot

250 miles is a little far to drive to look at a bike. I'm hoping someone responds that lives a little closer. As a last resort I will still look at it no charge if you can haul it to San Jose. I'm sure it's something simple we're missing.
fatdaddy.

This is something that happened to me and had me stumped for awhile
I replaced the spark plug and unknown to me the electrode was loose
when I was holding it tip up it looked fine, but when I put it in no spark
looked thru everything couldn't find the problem, and I don't remember
what caused me to take a closer look at the spark plug but when I did
I could see when it was upside down the electrode slipped and closed the gap totally.
not saying this is your problem but........

Just re-read the posts. You say it won't turn over unless the spark plug is out. Sounds like ya got the wrong plug and it's hitting the piston. So, What plug do you have in it? SHOULD be a NGKB6HS.
fatdaddy.

yup. when you get it fixed let us know what the issue turned out to be.

Does you clutch work? When you pull it in does the motor sprocket free wheel. Will it turn?