I've got a bike I'm going to try and fix up with my grandpa. It is a 1985ish Honda XL185S. I know there are some bike guys on here, where is the best place to gets parts for it?

I know it needs a clutch handle right now.

Anyone know if there is a kit or something that would allow me to mount a more powerful engine in it? I know it's not really worth doing a swap on, but I thought it'd be cool to do if possible.

Thanks.