yes Yamaha sells a longer swingarm, rims, ect for the big wheel conversion. I guess what I'm trying to figure out is if Yamaha sold a big wheel yz80 in 1996 out of the box from the factory or if all big wheel yz80's came from the factory as normal bikes with 14/17" wheels and all have had kits put on them after the fact? This might tell me if someone just put a 14" rear wheel on it and it does have the longer swingarm already, or if someone just put a 19" front wheel on a standard YZ80 so I would need a longer swingarm and bigger rear wheel to match the front.