My GSXF400 is from 1988 and uses the GSXR400 engine from that time. It's air/oil coiled, with no fan. There are major roadworks at the moment between home and work, and will be for the next couple of months. And it's Brisbane summer. The combination of these two facts is causing a lot of overheating in my bike. When it's stopped there's basically no cooling at all, and it's stopped a fair bit (even with splitting) at the moment. A couple of times it's been well into the red end of the temperature gauge. I guess a couple of questions: 1. What kind of damage is likely to be done if it's overheating a couple of times a week? It's not boiling water or creating pressure, but it can't be good for it. 2. Is there anything I can do? Might synthetic oil improve heat transfer and reduce friction and make it better? Or do I just have to try to find ways to go to work before or after rush hour to avoid the traffic?