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390 engine swap

  1. 390 engine into a 125 frame - Documented conversion attempt

    Recently had a go on a 390 duke and own a 125 duke (2017). Have decided to do a 390 conversion as want to keep my current bike in the family. I am going to document the entire transformation on here as I've seen a few threads but no ones given a step-by-step or any solid info; just speculation...