Yamaha Mt 15 Service Manual < 2026 >

Common codes: | Code | Fault | |------|-------| | 12 | Crankshaft position sensor | | 21 | Coolant temp sensor | | 33 | Intake air pressure sensor | | 46 | VVA solenoid circuit | | 59 | ABS pump motor |

The heart of the MT-15 is the VVA engine. The manual walks you through: Yamaha Mt 15 Service Manual

The VVA switches between low-RPM and high-RPM cam profiles at approximately 7,400 RPM. If you feel a "flat spot" or jerky transition, the manual guides you to check the oil pressure (VVA is oil-actuated) and the solenoid valve resistance (should be 11–13 Ohms). Common codes: | Code | Fault | |------|-------|