im curious to hear about the heat issue. mine is 225 or 70mm bore with the 10.25:1 cr. Ive ridden multiple trips of over 300 miles in a day in temps above 90. lots of WOT on the highway and gravel roads. I use an oil cooler and a trail tech voyager to keep a watch on temp. cylinder head temps usually 300-350 and never ever breaches 400 which I understand to be dangerous. I might add that I ride all year around unless there is snow or ice. Temps range from 20 to 100 and elevation of 800 to 7000 or so. anything above 5000 it starts to blubber in the mid range. I suspect that I have a richer jetting set up that you. It might help that Im 125# as well.