Hi Guys,

Apologies if this has been discussed, I did do a check......

I recently brought a new ECU off ebay for my '04 model to help with the surging. It's the ECU 5VK-8591A-00 with the white dot.

When fitted the bike won't start and displays error 54. The old ECU works OK.

Is it duff or do I need to reset something first?

Thanks in advance.