KESS3 3.65
Yamaha N-Max and X-Max 125: new Bench and Boot options
KESS3 3.65 expands access to Denso XXX-H594A-XX. Bench works with an original file from the database; Boot allows full reading and writing.
Since October 14, 2026, KESS3 has supported additional access methods for suitable Yamaha N-Max 125 and X-Max 125 models. Listed Denso variants are B6Y-H594A-20, BPB-H594A-00 and BMJ-H594A-00.
In Bench mode, connection is through the ECU plug without opening it. Virtual Reading supplies the appropriate original file from the database and does not read an existing third-party tune. Full reading and writing in Boot requires opening the control unit. OBD Virtual Reading was already available.
The manufacturer's page mentions 2021 and 2025 models in the main text, but only model years from 2025 in the technical section. The specific ECU part number is therefore decisive for identification.
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