First v quad

Hey guys long time no post but I've acquired a Honda (eww I know but very cheap find). It's a v65 1985 sabre 1100 and I have a could questions that any knowledgable motorcycle guy might know. First of all is the radiator, I put in a little bit of Coolant through the radiator cap, and I noticed after a little bit it was leaking. It was a pretty big puddle. So I took off the shroud to the radiator and where the coolant had dripped down its a bronze color? It's coming from what appears to be the bottom of the radiator fill hole. This is my first liquid cooled so I have no idea. Also, it looks like there's some coolant in all the way to the top of the bend. So wouldn't it over flow to the cap or is there a drain under that? Next question, is it possible to replace just the break fluid peep hole glass? It's a hydronic clutch and both the break and clutch peep hole has deteriorated super bad. Again sorry for the Honda question on a kawi page but i can't find a good Honda page. Thanks guys!

Pics
Steve

I'll post pics before work tomorrow, around 7. It's just my luck I can't find one shop manual in PDF so looks like I'll have to buy one

Don't you think you should finish one project before moving on to a new one?
Steve

Looks like I'll have to solder a crack underneath the radiator cap. And swest i sold my other bike

I got it fired up last night. On startup there's a couple puffs of smoke coming out of the carbs. Also it's smoking up the garage real bad, but it was sitting for a while so hopefully that stuff works itself out