A brand new aftermarket stator built as a direct replacement for the original charging unit fitted to the 2002 and 2003 Kawasaki Ninja ZX-12R. The ZX-12R makes heavy demands on its charging system, and a weak or shorted stator shows up quickly as a battery that will not hold charge, dimming lights at idle, or a bike that runs fine on a fresh battery and then dies on a long ride. This unit restores full output using higher grade electrical components than the original specification.
The windings are the highest grade copper, rated to resist 200 degrees Celsius, and the laminations are premium grade. That heat tolerance is the key upgrade over a tired original, because stator failure on a high-output sportbike is almost always thermal. The unit carries four wires terminating in a single three-pin plug, and the three alternator legs each read approximately 0.4 ohms to one another, so the part can be verified with a multimeter both before fitting and at any future service.
The original grommet is reinstalled onto the new stator during fitting, and a connector is supplied in the box. RMSTATOR also includes the opposite connector for the main harness side, because the original plug on that side is very often melted or corroded and is a frequent cause of repeat electrical faults. Renewing both halves of the connection at the same time is the sensible approach.
Key Features
- Brand new aftermarket stator, not a rewind
- Direct replacement for the original unit
- Higher grade of electric components than standard
- Highest grade copper windings resistant to 200 degrees Celsius
- Connector included
- Grommet included
- Opposite connector for the main harness side also supplied
- Four wires into a single three-pin plug
- Resistance values published so the unit can be bench tested
Technical Specs
| Specification |
Detail |
| Part number |
RM01085 |
| Interior diameter |
41 mm |
| Exterior diameter |
103 mm |
| Thickness |
21 mm |
| Wire length, stator to grommet |
45 mm |
| Wire length, grommet to plug |
800 mm |
| Number of wires |
4 |
| Number of plugs |
1 |
| Number of pins |
3 |
| Alternator resistance, Black/Red to Black/Red |
0.4 ohms +/-20% |
| Alternator resistance, Black to ground |
O.L on display +/-20% |
| Temperature rating |
200 degrees Celsius |
Vehicle Fitment Guide
| Make & Model |
Years |
| Kawasaki Ninja ZX-12 R |
2002 |
| Kawasaki Ninja ZX-12 R |
2003 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 21003-1391 |
Kawasaki |
| 21003-0011 |
Kawasaki |
Frequently Asked Questions
Do I need to modify anything to fit this stator?
No. It is a direct replacement for the original unit on the 2002 and 2003 ZX-12R. The original grommet is reinstalled onto the new stator, after which it is a straightforward refit with no harness modification.
What is included?
The brand new stator, the connector, the grommet, and the opposite connector for the main harness side.
How do I confirm my existing stator has failed?
With the plug disconnected, measure between the alternator legs: a serviceable unit reads about 0.4 ohms Black/Red to Black/Red, within plus or minus 20 percent. Then check any output wire to a clean earth on the engine - the meter should read O.L, meaning open circuit. Continuity to ground means the winding insulation has broken down and the stator must be replaced.
Why does the kit include a second connector?
The plug on the main harness side is often found melted or corroded, and a degraded connector will cook a new stator just as it cooked the old one. Fitting the supplied harness-side connector at the same time removes that failure point.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
