Forgive my ignorance but I had always thought octane rating had no effect on engine temp as long as the petrol was sufficient. There's a formula online as to how much paraffin one can add and still be ok but I would have thought diesel might add a bit of lubrication as well. I know modern fuel burns hotter. I've got a colder plug than normal in my 16H to stop it pinking up [very] long hills
Hello
First i would check oil is returning into the oil tank. Take the oil cap off when its running there should be oil flowing out of the pipe. My advance lever moves about a third, the speed should increase as you advance it.Take the points cover off kick the bike and note the direction then move your advance lever you will see the cam ring moving too and fro.When the ring turns in the same direction as the points turn that is retarding, when they move in the opposite direction that is advancing the timing.
Good luck.
