I got a Buddy 150 today that had been sitting for a while. I cleaned the gas tank and carb, fresh gas and new battery and it feels like it just has low compression. bummer!!

I'll test the compression valve clearance tomorrow; but i know what low compression feels like.
Question: If I have to do the top end job on it, what is the recommended kit to get? I don't necessarily want to go bigger; just a reasonable price.
Secondly, do I have to take the motor out or can I get away with pulling the head/cylinder while the motor is still in the bike?
Appreciate your feedback!
Thanks!