Join Date: Oct 2007
Location: Great White North
generally it gets better after some miles, but they are definitely marginally cooled.
Adding a rear heat exchanger off a mountain sled can help a lot.
Also I've found that the Yamaha thermocouples are questionable at best, if you've got an IR thermometer I'd be checking the underhood temps when it's overheating to see what it's actually at for temp. The outside of the block ofcourse will be colder than the coolant but it'll atleast give you an idea.
When hell freezes over, we'll ride there too.