Hello gang, recently started having problems with the charging system on my 1300. Battery will top off but after about 15-20 miles it is drained. Have tested the battery pre- start and shows 12.8 volts. After start meter shows 11.6. Have replaced the rectifier(which had corrosion and a broken spade. I guess the stator is bad? I am about a 6 on scale of 1-10 mechanic skills, is the stator replacement something I should be able to do with a minium of specialty tools? Or is there something else that I need to check first? Thanks for the input!