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New ECU to flash

1934 Views 5 Replies 3 Participants Last post by  research monkey
Considering that Yamaha may deny warranty on retuned bikes im thinking about buying a replacement ecu and sending it out to be flashed. Then if i ever need warranty work i can just swap back in the org ECU. Looks like they can be had for about $340 but i see 2 part numbers.

One says for U49(BEB-8591A-30-00 ) and one says for CAL(BEB-8591A-40-00 ), guessing its California emissions specific one? Can anyone confirm the difference?
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Would that work or when they plug the bike in they could see that the ecu was unplugged at one point and then plugged back in at a later date?
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