Great website btw

Have just won an 89 750 sport on e-bay. I had a look at the bike before bidding heard it running etc.... I'm happy with the price i paid for it !
Have been searching on the forum to gain as much info beforehand. But still a few q's:
1) what is the correct procedure for checking the oil level and confirm oil type 20w/50 ?
2) It has a cracked screen at the moment, will a screen for a later 750ss or 900ss fit ? or does anyone know any uk or european companies that sell replacement screens ?
Hopefully collecting the bike this weekend - will be a gentle ride back home as not known when the belts were last changed (its done 26000 km, but been standing around a bit). I'm going to be doing all the service work myself (correct tools permitting) as i'm ok with a set of spanners, and have downloaded the workshop manual from the site here already

Will try to get some pics up eventually.
And finally - would a fairing set for a 750 F1 fit this bike, or are they physically very different in size ? I'm thinking of possibly an F1 replica courtesey of these guys

will check back soon. Cheers. Ant.