A brand new aftermarket high output stator for the Honda TRX 90 Fourtrax and Sportrax, built as a direct replacement for the original unit fitted from 1993 through to 2005. It is a plug-and-play, direct fit part: five wires, five plugs and five pins, arranged as the original, so the stator mounts in the same position and every connector on the loom mates without adaptation. Part number RM01431 cross-references the Honda original part number 31120-HF7-003.
Being a high output unit, it is intended for machines whose charging system is being asked to do more than the standard part comfortably manages, and it is built on highest grade lamination materials with copper windings rated to 200 degrees Celsius. Three resistance figures make it straightforward to test: the alternator winding reads 0.4 ohms from ground to yellow, the pickup reads 150 ohms from blue/yellow to ground, and the source coil reads 500 ohms from black/red to green, each within a 20 percent tolerance. The stator, the pickup pulsar coil, the connector and a rubber grommet are supplied together. Please note that the secondary grommet must be reused from your original unit.
Key Features
- Brand new high output stator, not a rewound core
- Direct replacement for the original unit
- Plug-and-play, direct fit, easy installation
- Highest grade lamination materials
- Copper windings rated to 200 degrees Celsius
- Five wires, five plugs, five pins as original
- Pickup pulsar coil, connector and rubber grommet included
- Secondary grommet must be reused from the original unit
- Cross-references OEM 31120-HF7-003
Technical Specs
| Specification |
Detail |
| Interior diameter |
28 mm |
| Exterior diameter |
83 mm |
| Thickness |
24 mm |
| Wire length (stator to grommet) |
75 mm |
| Wire length (grommet to plug) |
260 mm |
| Pickup coil wire length (to grommet) |
150 mm |
| Number of wires |
5 |
| Number of plugs |
5 |
| Number of pins |
5 |
| Alternator resistance (ground to yellow) |
0.4 ohms +/-20% |
| Pickup resistance (blue/yellow to ground) |
150 ohms +/-20% |
| Source resistance (black/red to green) |
500 ohms +/-20% |
| Copper winding temperature rating |
200 degrees Celsius |
| Part number |
RM01431 |
Vehicle Fitment Guide
| Make & Model |
Years |
| Honda TRX 90 Fourtrax and Sportrax |
1993-2005 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 31120-HF7-003 |
Honda |
Frequently Asked Questions
Will this fit my TRX 90 without modification?
Yes. It is a direct replacement for the original stator fitted to the Honda TRX 90 Fourtrax and Sportrax between 1993 and 2005, with the same five wires, five plugs and five pins. No cutting or splicing is required. Check the number on your existing unit against 31120-HF7-003 before ordering.
What is included?
The stator, the pickup pulsar coil, the connector and a rubber grommet. The secondary grommet is not supplied and must be reused from your original unit, so keep it when you remove the old stator.
How do I know my old stator has failed?
A flat or failing battery, dim lights and a weak or missing spark are the usual signs. Test with a multimeter: ground to yellow should read 0.4 ohms, blue/yellow to ground should read 150 ohms and black/red to green should read 500 ohms, each within 20 percent. An open circuit, or continuity between a winding and the stator plate, confirms failure.
What does high output mean here?
It is a high output version of the standard TRX 90 stator, wound to give more charging capacity than the original while keeping the same physical dimensions, the same five-wire layout and the same plugs, so it fits and connects exactly as the standard part does.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
