not much is going on, i lost internet for a while and then kinda just got used to falling asleep on the couch while im watching tv at night instead of going on the computer even when we got it back haha
IMO the powercore 2 sounds the best but its a bit long... and no you shouldnt have to rejet for just a silencer but do a plug chop to be sure. the best thing to do is get a complete exhaust because just adding a silencer does not increase performance
what i did one time my bolt was stripped and i needed to get the oil out was take off the clutch cover enough to let all the oil pour out. i was lucky and it didnt hurt my gasket so i just loosened the bolts then when it was done i tightened them and its fine