Motorcycle Repair: 83 Honda Shadow, selector fork, transmission gears

Question
My Honda Shadow jumps out of gear while exceling and sometimes while just riding

Answer
When bikes jump out of gear it usually means a worn transmission, although perhaps you are not shifting into the gears fully.  Make sure that you shift deliberately and completely when changing gear. If it is always the same gear, it may be a bent selector fork or worn transmission gears.  I would start by changing the oil and checking the old oil for debris.  Good luck,  Jan