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Starter Motor for Yamaha TTR50E TT-R50E 2005–2017 TTR90 | OEM 1P6-H1890-00
Starter Motor for Yamaha TTR50E TT-R50E 2005–2017 TTR90 | OEM 1P6-H1890-00
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Product Overview
Restore reliable starting performance to your Yamaha mini dirt bike with this 9-tooth 12V electric starter motor, designed for select Yamaha TT-R50E / TTR50E and TT-R90 / TTR90 models.
Built to replace OEM reference numbers 1P6-H1890-00, 1P6-H1800-01, 5DW-H1800-00, and 5HN-81890-00, this starter motor helps solve common starting problems such as slow cranking, no-start issues, weak starter engagement, clicking without turning the engine, or a worn-out original starter motor.
Manufactured with a durable metal housing, copper motor windings, and heavy-duty internal components, this starter motor is built to deliver dependable 12V starting power for youth dirt bikes, trail riding, and regular off-road use.
Product Compatibility
This 9T 12V electric starter motor is compatible with the following Yamaha models:
| Brand | Model | Engine / CC | Year Range | Notes |
|---|---|---|---|---|
| Yamaha | TTR50E / TT-R50E | 50cc | 2005–2017 | Verify OEM number before ordering |
| Yamaha | TTR90 / TT-R90 | 90cc | 2004–2007 | Verify OEM number and gear size |
| Yamaha | TTR50E / TT-R50E | 50cc | 2006–2024 | Possible fitment based on cross-reference; confirm OEM and dimensions |
OEM Cross Reference
1P6-H1890-00, 1P6-H1890-00-00, 1P6-H1890-01-00, 1P6-H1800-01, 1P6-H1800-01-00, 5DW-H1800-00, 5DW-H1800-00-00, 5HN-81890-00, 4ST-H1800-00, 49P-H1800-00
Specifications
| Specification | Details |
|---|---|
| Part Type | Electric Starter Motor |
| Voltage | 12V |
| Tooth Count | 9 Teeth |
| Starter Type | PMDD |
| Rotation | CW / Clockwise |
| Gear Outer Diameter | Approx. 8.7 mm / 0.34 in |
| Gear Length | Approx. 23.4 mm / 0.92 in |
| Material | Metal housing with copper motor windings |
| Condition | 100% New Aftermarket |
| Fitment Type | Direct Replacement |
| Installation | No installation instructions included |
Key Features
- Direct Replacement Design – Engineered to replace the original Yamaha starter motor with matching 9-tooth fitment on compatible TT-R50E and TT-R90 models.
- Reliable Starting Performance – Helps restore smooth cranking and dependable engine start-up when the original starter motor becomes weak or fails.
- 9-Tooth 12V Design – Built with a 9T starter gear and 12V power configuration for compatible Yamaha mini dirt bike applications.
- Durable Construction – Made with a strong metal housing, copper windings, and heavy-duty internal components for improved service life.
- Easy Installation – Designed for straightforward replacement without extra adjustment when the OEM number and dimensions match.
- Built for Youth Dirt Bike Use – Suitable for trail riding, practice bikes, small off-road motorcycles, and regular starting cycles.
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Fitment FAQ
Will this part fit my specific model and year?
This starter motor is intended for Yamaha TTR50E TT-R50E 2005–2017 TTR90. It is best matched to original part number(s) 1P6-H1890-00, 1P6-H1800-01, 5DW-H1800-00, 5HN-81890-00. Key physical/spec details from the product data include Voltage: 12V, Tooth Count: 9 Teeth, 9 Teeth. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 1P6-H1890-00, 1P6-H1800-01, 5DW-H1800-00, 5HN-81890-00 before purchase. For this starter motor, also compare the OEM number, voltage, tooth count, rotation direction, mounting ears, bolt spacing, terminal type, and overall length. This is especially important for Yamaha TTR50E/R50E/TTR90/H1890 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this starter motor for machines outside the listed compatibility, or for units with different tooth counts, CW/CCW rotation, mounting ears, terminal locations, or voltage ratings. If your original part number does not cross-reference with 1P6-H1890-00, 1P6-H1800-01, 5DW-H1800-00, 5HN-81890-00, treat the fitment as unconfirmed. Model years outside 2005–2017, 2004–2007, 2006–2024, 2005, 2017 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, voltage, tooth count, rotation direction, mounting ears, bolt spacing, terminal type, and overall length. Confirm OEM/cross-reference number(s): 1P6-H1890-00, 1P6-H1800-01, 5DW-H1800-00, 5HN-81890-00. Recheck listed specs such as Voltage: 12V, Tooth Count: 9 Teeth, 9 Teeth. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.