Tried a bit, it's better. It didn't go away entirely but it's better. I also tried braking and there is no "delay and chunk!" so I don't believe it's the chain. Now I'm waiting for the belt I ordered.
On another not, how sensitive are these sleds to overheating? I was riding on the lake at a very sedate pace and when I stopped too look around and idled for maybe 30 seconds I noticed the temp red light. I don't know how long it's been on but I shut down immediately, waited with raised hood 10 min and rode him, no problem. I've never encountred this with this sled or the Exciter II I previously owned. It's been warm and now cold so it's like running on concrete but still... It shouldn't bee any ill effects or?