Yamaha Tricity 125 / 150 Starter Motor
Yamaha electric starter motor for selected Tricity 125 and Tricity 150 models using the same 9-spline starter specification. The 54P-H1890-02 unit is part of the established Yamaha interchange family used on compatible MW/MWS applications.
What Is Supplied
- 1 Yamaha electric starter motor assembly
- 9-spline starter drive / output shaft
- Cast aluminium drive-end housing with two mounting points
- Starter motor body and rear end housing
- Insulated electrical power terminal with retaining nut
- Drive-end sealing O-ring as fitted/shown
The starter relay/solenoid, battery cables, separate starter gears and engine mounting bolts are not included unless clearly shown in the photographs.
Specification
- Brand: Unbranded
- Part type: aftermarket starter motor assembly
- Electrical system: 12 V
- Drive: 9-spline
- Approximate drive diameter for cross-checking: 8.9 mm
- Approximate exposed drive length for cross-checking: 24.6 mm
- Mounting: twin unthreaded mounting holes, approximately 6.8 mm
Brand: Unbranded aftermarket replacement. Yamaha names and OE numbers are used only to identify compatible applications and are not the manufacturer part number of the item supplied.
Yamaha OE References
- 54P-H1890-02 - original Yamaha starter motor assembly reference
- 54P-H1890-04 - Yamaha superseding replacement for 54P-H1890-02
Compatible OE / Interchange Reference Family
- Yamaha: B7A-H1890-00
- Yamaha: BW5-H1890-00
- Yamaha: 54S-H1890-03
- Yamaha: 2SB-H1800-10
Manufacturer / Aftermarket Cross References
- WAI: 16068N
- Dirt Racing: 19-A1040
- Lester: 16068
- Valeo / interchange reference: JYBX-004
Cross-reference numbers are provided to help identify equivalent starter specifications. This product is the Yamaha item shown and is not represented as being manufactured by the aftermarket brands listed above.
Fitment
- Yamaha MW125 / MWS125 Tricity - confirmed 2017 application
- Yamaha MWS125 Tricity ABS - confirmed 2017 application
- Yamaha MWS150 Tricity - confirmed 2016 application
- Other Tricity years only where the fitted OE number cross-references to 54P-H1890-02 / 54P-H1890-04
Important Compatibility Check
Yamaha used different starter motors across closely related model years and markets. Before ordering, compare the original part number and starter with the photographs. Check the 9-spline drive shaft, mounting-lug positions, electrical terminal location and overall housing shape. Matching Yamaha OE number 54P-H1890-02 or its confirmed supersession 54P-H1890-04 is the safest method of confirming fitment.
Starter Fault Checks
Slow cranking or a no-crank fault can also be caused by a weak battery, poor earth connection, corroded terminals, damaged wiring, a faulty starter relay/solenoid or a fault in the starter-drive mechanism. Check the starting circuit before replacing the motor.
Installation
Disconnect the battery before removal or installation. Clean the mounting and electrical-contact areas, inspect the sealing O-ring and wiring, ensure the starter seats squarely in the crankcase and tighten all fasteners to Yamaha workshop specifications.