I had an overheating problem a few weeks ago with my '82i. I replaced the thermostat, both hoses and the rad cap and it's been fine ever since, even on days the temp. has been 80- 90 degress. I wonder if old hoses get weak and colapse when under pressure causing a restriction in flow in the cooling system.
Yes, the hoses can collapse when the get hot. That's why it's good to grab them(preferably when not hot) when doing any maintenance and give them a squeeze. They should be firm. If they feel like mush, replace them.
This statement is not clear. Please elaborate what you mean by it. Have you fixed the boiling problem?
If you have an oil pan leak you need help on, start a new topic on that. Keep this topic to the overheating unless it is a headgasket leaking, which you have not answered what the problem is. We want to help, but you need to give the right info.
You could need to "burp" the system to get an air bubble out. Do a search on the procedure.
I've used Evans NPG+ waterless coolant in my '83 Interstate for the last 7 years without changing it and the bike still runs within the safe operating range. I also use a 4lb. cap(not a typo) to keep a little bit of pressure on the system. Since there's no water, it won't boil over until 375 deg.(not a typo). If I do have a hose failure, it would be a trickle rather than a gusher.