Though I would say hello as I have been stalking for a bit. Anyway I am the new owner of a 1987 elite s (se50), the unrestricted version;) Now to the serious stuff... How to make it faster

I can get the scoot going 35 on the flats and it got up to 45 on a slight downhill. It spews blue smoke every once and awhile, seems to come and go though... I know I don't have a restrictive muffler but I'm not too sure if it has anything on that would be slowing it down or if it just needs a good going through.
I plan on swapping out the oil, airfilter, and belt. Anything else I'm missing? A good guide on what to replace or freshen up would be awesome! The thing only has 920 miles on it though

Also how hard is it to replace the lock that holds seat down as it is missing? I would have to replace the ignition too I'd imagine, any chance they may still have this at the Honda dealership?

I'm a newb when it comes to scoots but have some experience with cars. But I'm gonna use this for commuting around Eugene Oregon so it'll see some rain too... But any help is appreciated, thanks!!!
(sorry if post us a bit off as I'm did this on my phone)