This is a brand new aftermarket generator stator for the Honda CB500 family - the CB500F, the CB500X and the CBR500R - built as a direct replacement for the original charging coil assembly. It is supplied complete with the pick up pulsar coil, the connector and the rubber grommet already fitted, so it goes straight into the engine case in place of the original with no modification to the bike, no rewiring and no splicing.
The unit uses the highest grade lamination materials and highest grade copper windings rated to 200 degrees Celsius, which is what separates a lasting repair from a stator that fails again in a season. A weak or shorted stator on these machines shows up as a battery that will not hold charge and as system voltage that refuses to climb as the engine revs. Every unit is tested before it is shipped.
Key Features
- Brand new aftermarket stator - a direct replacement for your original unit
- Plug-and-play, direct fit, easy installation with no modification required
- Highest grade lamination materials for a stable magnetic circuit
- Highest grade copper windings, resistant to 200 degrees Celsius
- Connector and rubber grommet included
- Every unit is tested before it is shipped
- Pick up pulsar coil included
- Five wire, five pin configuration matching the original harness
Technical Specs
| Specification |
Detail |
| Interior diameter |
54 mm |
| Exterior diameter |
125 mm |
| Thickness |
25 mm |
| Length of wires stator to grommet |
80 mm |
| Length of wires grommet to plug |
50 mm |
| Length of pickup coil wire to grommet |
35 mm |
| Number of wires |
5 |
| Number of plugs |
2 |
| Number of pins |
5 |
| Alternator resistance |
Yellow to yellow = 0.4 ohms +-20% |
| Pickup resistance |
Yellow to white = 120 ohms +-20% |
| Winding temperature rating |
Resistant to 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 |
| Honda CB500F / CB 500 F |
2013-2018 |
| Honda CB500X / CB 500 X |
2013-2018 |
| Honda CBR500R / CBR 500 R |
2013-2018 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 31120-MGZ-J01 |
Honda |
| 31120-MJW-J01 |
Honda |
Frequently Asked Questions
Will this stator fit without modifying my bike?
Yes. It is a direct, plug-and-play replacement. The dimensions, the five wire layout and the connectors all follow the original specification, so it fits the engine case and the existing harness with no cutting or splicing.
Does the same part fit all three CB500 models?
Yes. RMSTATOR list this single stator for the CB500F, the CB500X and the CBR500R built between 2013 and 2018, because all three use the same charging coil assembly.
What is included in the box?
The stator, the pick up pulsar coil, the connector and the rubber grommet.
How do I know my old stator has failed?
Look for a battery that goes flat despite being healthy, charging voltage at the battery that stays close to resting voltage instead of rising with revs, and lights that dim rather than brighten as the engine picks up. Confirm with a multimeter: yellow to yellow should read about 0.4 ohms across each pair, and the pickup should read about 120 ohms yellow to white. Any winding showing continuity to earth is shorted and the stator must be replaced.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
