alright started to take aprt the topend when i noticed that once i removed the rectifier housing the engine spun free and "normal" feeling . after a while of scratching my head and looking at it , i put the housing back on and realized that once the bolts for it were tight thats when it was stiff feeling . took it back apart and realized the back of the housing was pressing to tight on the cam sprocket kinda binding it up . had a extra housing so i decided to try grinding the back side where it was touching the cam . and now it feels normal . this seems very weird . any ideas on what the heck happened ???