Hi, have you found a solution for your problem?
I have a similar one my self:
http://www.bikechatforums.com/viewtopic.php?p=2236844#2236844
And I would like to know if you succeeded to use an USA ECU (38770-MBW-A12)?
I have a 34HP limited ECU 38770-MBW-D31, and I am looking for a full power...