Normal
Welcome to the joys of really old two stroke bikes. You really need to take that brake pad pin out and replace the both of them. Dot 3 is NOT OK. The bike calls for Dot 4 for a reason. 10W 40 however is going to be fine because your gonna change it again here pretty soon anyway. Repacking a silencer isnt rocket surgery. However you are trying to repack a broken silencer. At the very minimum purchase a new silencer. I had no idea your bike was that bad off. I thought I had it rough with mine. After reading about yours mine has been a cream puff in comparison. But you will power through it.