This is a brand new stator for the Yamaha YFM 350 Big Bear, Warrior and Moto-4 and the YFM 400 Kodiak. It is a direct replacement for the original unit and fits plug and play, with no rewiring or modification needed. The stator carries the alternator windings that charge the battery, the pick-up coil that triggers the ignition and a separate source coil, so a fault in any one circuit can leave the machine either flat or completely dead.
The windings are the highest grade of copper, rated to resist 200 degrees Celsius, on the highest grade of lamination material. The unit is 115 mm across the outside, 53 mm inside and 14 mm thick, with seven wires, three plugs and seven pins. Leads run 150 mm from the stator to the grommet and 420 mm from the grommet to the plug, with a 300 mm pick-up coil lead. The pick-up pulsar coil, the connector and the rubber grommet are supplied fitted, and the main harness side connector is included as well. Every unit is tested before it is shipped.
Key Features
- Direct replacement for the original Yamaha stator
- Plug and play, direct fit, easy installation
- Copper windings resistant to 200 degrees Celsius
- Highest grade lamination material
- Pick-up pulsar coil, connector and rubber grommet included
- Main harness side connector included
- Every unit is tested before it is shipped
Technical Specs
| Specification |
Detail |
| Interior diameter |
53 mm |
| Exterior diameter |
115 mm |
| Thickness |
14 mm |
| Wire length (stator to grommet) |
150 mm |
| Wire length (grommet to plug) |
420 mm |
| Pick-up coil wire to grommet |
300 mm |
| Number of wires |
7 |
| Number of plugs |
3 |
| Number of pins |
7 |
| Alternator resistance (White to each White) |
0.4 ohms +/-20% |
| Pick-up resistance (White to Red) |
450 ohms +/-20% |
| Source resistance (Green to Brown) |
320 ohms +/-20% |
| Copper winding temperature rating |
200 degrees Celsius |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model |
Years |
| Yamaha YFM 350 Big Bear |
1993-2001 |
| Yamaha YFM 350 Warrior |
1993-2001 |
| Yamaha YFM 350 Moto-4 |
1993-2001 |
| Yamaha YFM 400 Kodiak |
1993-2001 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 4GB-85510-00-00 |
Yamaha |
| 3HN-85510-10-00 |
Yamaha |
Frequently Asked Questions
Will this fit without modification?
Yes. It is a plug and play direct replacement for the original stator on the listed models, using the original mounting and connectors. Check the number on your existing unit against the cross reference table before ordering.
What is included?
You receive the stator with the pick-up pulsar coil, the connector and the rubber grommet fitted, plus the main harness side connector. The flywheel and the cover gasket are not included.
How do I know my stator has failed?
Measure across the white alternator wires - each pair should read 0.4 ohms plus or minus 20 per cent, with no continuity to earth. The pick-up should read 450 ohms plus or minus 20 per cent from white to red, and the source coil 320 ohms plus or minus 20 per cent from green to brown. An open circuit, a short to earth or a reading well outside those bands means the stator has failed.
My quad cranks but has no spark - is the stator the cause?
It can be. On these models the source coil and the pick-up coil are both part of the stator assembly, and either one going open circuit will stop the ignition firing while the alternator windings still charge the battery normally. Test the white to red pick-up circuit and the green to brown source circuit before replacing the CDI.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
