Weird sound..and a few more ?

[diehltime]

So I bought a Pdub from a guy off craigslist, ran but real rough....so I did some maintenance, cleaned airbox and carb, and got it running.
but there are two problems

1. at half throttle the power plateaus....getting a new plug tonight and going to check the reeds, and there is no washer in the exhaust (which was just about plugged shut so I cleaned it with brake cleaner and burned out what I could with a torch)...any other ideas?

2. when it is running there is a scraping sound coming from the trans. my initial thought was crank bearings but I am not sure....clutch plates? I really have no idea

Any help would be greatly appreciated, I have searched all over for answers but have had no luck....
Thanks!!!

[patrick2917]

I have a 2002 pw 80 and im wondering what I can do to be able to wynde out the gears without it boging down towards the end of every gear it sounds like a restritor? What can I do?