ok so I took my bike into the shop to get the jetting adjusted and than went riding today. theres a few things im iffy about and i forgot to ask the bike mechanic when I was there. take a look at my carbuerator. I think it is missing a screw or something. also in the crankcase(?) im missing 2 screws that i think should be put in to keep dirt from getting into the working parts of the bike. heres the pics. the 2nd pic is of the right side of the carb should there be a screw there in that spot? also in the first pic should that tube be there? i looked at bikepics.com same bike as mine and there was no tube there.