alright..just moved my brother up from a 1990 cr80 to a 1999 cr80r-expert today..picked it up today it looked mint, good compression, started up first kick, and look very well maintained. i took it home and started it up took it up and down the street a couple times jsut to see how felt with the bore kit he had on it and the boyeseen reeds..it ran fine but the fuel it was burning smelt horrible, and then when i pulled back into the garage my brother said there were some sparks shooting out of the exhaust pipe..when i start it up there is a little jingle noise kind off.and when i turned it off after ridding it, there was smoke coming out of he exhuast..and not the normal amount..i took it out again, and i got the bad smell..and the jingling when i was just sitting there revving..but no smoking...any clue what is wrong?