I used to move over to the left hand wheel tracks whiched helped a bit with trucks.
The bigger bike does help - going form the Scorpio to the 650 I felt it helped. It's also a confidance thing - the more you tense up and worry about it the worse it is. Someone told me that once, and I mentally took it as 'HTFU', gave it a go, and what do you know, it wasn't as bad anymore.
So basically as suggested try to relax a bit, and not to worry too much. Good luck!
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