out of all the stuff we've covered the only logical thing it could be is your clutch plates are stuck together loosen those 5 bolts evenly (keep doing a turn at a time and switch to the next and so on and take the pressure plate and springs out and then take an impact and loosen the 1 bolt under the pressure plate and pull the basket and clutch plates out just keep all the plates in order the way they were in just to see if they are stuck together there is a good how to video in the how to section on the whole process.
yes yamahauler that is exactly what i was thinking, i seen some black crud if you look real close in between the plates. I dont have a impact, in my garage. Is there any other way to get it off without a impact?