YAMAHA · RH850 HWII ECU

YAMAHA X-MAX RH850 HWII tuning files

Tuning file coverage for the YAMAHA X-MAX running the RH850 HWII ECU. The matched variants sit between 11 and 11 HP from the factory. There are 10 distinct variants on file for this combination. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. Your file is built against the exact ECU software on the car, then operator-verified.

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Available solutions

Applicable work for the RH850 HWII on this vehicle. The available set firms up once the exact engine and software are known.

Stage 1Stage 2

Engine variants & ECU software

10 distinct variants for the YAMAHA X-MAX on the RH850 HWII ECU. Reference the engine and controller software when you upload.

Variant 1

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP

Variant 2

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
12723080_00
Calibration
12723080_00

Variant 3

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
12812000_00
Calibration
12812000_00

Variant 4

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
1275A000_00
Calibration
1275A000_00

Variant 5

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
12493000_00
Calibration
12493000_00

Variant 6

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
121A9080_00
Calibration
121A9080_00

Variant 7

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
1245C000_00
Calibration
1245C000_00

Variant 8

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
12269000_00
Calibration
12269000_00

Variant 9

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
12494000_00
Calibration
12494000_00

Variant 10

ECU
Catalog engine
125 11HP
Controller brand
DENSO
ECU
RH850 HWII
Stock power
11 HP
SW upgrade
12A1D000_00
Calibration
12A1D000_00

Related vehicles

Other vehicles built on the RH850 HWII controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the YAMAHA X-MAX on the RH850 HWII?

Stage 1, Stage 2. The exact set depends on the specific engine and software version.

Do you cover the RH850 HWII ECU software on this model?

Yes — the YAMAHA X-MAX on the RH850 HWII ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.

How is the file delivered?

Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.

YAMAHA X-MAX RH850 HWII ECU Tuning Files | TuningBay