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Honda CR250R CR125R Magneto Stator 2000–2001 | 31100-KZ3-J21
Honda CR250R CR125R Magneto Stator 2000–2001 | 31100-KZ3-J21
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Product Overview
Restore reliable ignition and electrical performance with this motorcycle generator magneto stator coil, designed for selected Honda CR250R and CR125R motocross applications from 2000 to 2001.
Built to replace 31100-KZ3-J21 / 31100-KZ4-J31 / 31100-KZ4-A91, this stator helps solve common electrical issues such as weak or no spark, hard starting, intermittent ignition failure, unstable output, and poor engine performance.
Made with high-quality materials, this stator is designed for high-temperature resistance, vibration resistance, corrosion resistance, stable insulation performance, and long service life under off-road riding conditions.
Product Compatibility
| Brand | Model | Engine / HP / CC | Year Range | Notes |
|---|---|---|---|---|
| Honda | CR250R | 250cc | 2000–2001 | Verify OEM number, connector style, and stator dimensions before purchase |
| Honda | CR125R | 125cc | 2000–2001 | Verify OEM number, connector style, and stator dimensions before purchase |
OEM Cross Reference:
31100-KZ3-J21, 31100-KZ4-J31, 31100-KZ4-A91
Related references sometimes seen:
31100-KZ3-J31, 31100-KZ3-J30, 31100-KZ4-J30, 31100-KZ4-A90
Specifications
| Specification | Details |
|---|---|
| Part Type | Generator Magneto Stator Coil |
| Outer Diameter | 61 mm / 2.4" |
| Inner Diameter | 27 mm / 1.06" |
| Iron Core Height | 13 mm / 0.51" |
| OEM Replacement | 31100-KZ3-J21 / 31100-KZ4-J31 |
| Material | High-quality replacement-grade stator construction |
| Function | Ignition and electrical output support |
| Installation | Direct replacement on correctly matched applications |
| Fitment Method | Match by OEM number, connector style, stator size, and original part layout |
| Condition | 100% New Aftermarket |
Key Features
- OEM-Style Replacement – Designed to replace Honda stator numbers 31100-KZ3-J21 / 31100-KZ4-J31
- Stable Ignition Support – Helps provide reliable spark output and smoother starting
- Durable Off-Road Construction – Built for vibration resistance, heat resistance, and corrosion resistance
- Compact Stator Design – Matches the small CR-series stator layout when dimensions and connector style match
- Long Service Life – Designed to maintain stable insulation performance under demanding riding conditions
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Fitment FAQ
Will this part fit my specific model and year?
This magneto stator is intended for Engine / HP / CC. Listed year information includes 2000–2001, 2000, 2001. It is best matched to original part number(s) 31100-KZ3-J21, 31100-KZ4-J31, 31100-KZ4-A91, 31100-KZ3-J31. Key physical/spec details from the product data include Outer Diameter: 61 mm / 2.4", Inner Diameter: 27 mm / 1.06", Iron Core Height: 13 mm / 0.51". 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 31100-KZ3-J21, 31100-KZ4-J31, 31100-KZ4-A91, 31100-KZ3-J31 before purchase. For this magneto stator, also compare the OEM number, outer/inner diameter, core height or thickness, plug shape, wire count, mounting holes, pickup position, and rubber grommet style. This is especially important for Honda CR250R/CR125R/J21 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 magneto stator for machines outside the listed compatibility, or for units with different plug layouts, pickup-coil positions, wire counts, stator diameters, or charging/ignition configurations. If your original part number does not cross-reference with 31100-KZ3-J21, 31100-KZ4-J31, 31100-KZ4-A91, 31100-KZ3-J31, treat the fitment as unconfirmed. Model years outside 2000–2001, 2000, 2001 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, outer/inner diameter, core height or thickness, plug shape, wire count, mounting holes, pickup position, and rubber grommet style. Confirm OEM/cross-reference number(s): 31100-KZ3-J21, 31100-KZ4-J31, 31100-KZ4-A91, 31100-KZ3-J31. Recheck listed specs such as Outer Diameter: 61 mm / 2.4", Inner Diameter: 27 mm / 1.06", Iron Core Height: 13 mm / 0.51". If any connector, mounting point, size, or year detail is different, confirm fitment before installation.