First thing i did was check oil level, put in a new battery and try to start the engine.
It started without problems, i then measured the compression on both the cilinders, one had 180 psi the other 185 psi.
Good values so no major problems with the engine for this moment.
I also checked the electrical current on the battery, this was around 13,9 so that must be charging.
After these first checks i was ready to start taking here apart.