This is a brand new aftermarket starter relay solenoid switch, supplied as a direct replacement for the original unit. The starter relay is the heavy-duty switch that sits between the battery and the starter motor: pressing the start button sends a small control current through the two-wire plug, energising the internal coil, which in turn closes the main contacts and passes full battery current to the starter through the two threaded terminals. Because it carries the entire starting load, it is one of the most common causes of a machine that will not turn over.
RMSTATOR state that the quality of this unit exceeds the original equipment part and that all products shipped are tested before dispatch. The body measures 46.5 mm in length, 33.6 mm in width and 48.4 mm in height, and the control lead is 460 mm long with two wires terminating in a single plug. It replaces OEM part numbers 43D-H1940-00-00 and 0455028. The manufacturer notes that all item pictures are accurate, so if you are in any doubt, compare the unit against your original part before ordering.
Key Features
- Brand new aftermarket starter relay solenoid switch
- Direct replacement for the original unit - no modification needed
- Quality stated by the manufacturer to exceed the original equipment part
- Every unit is tested before it is shipped
- 460 mm two-wire control lead terminating in a single plug
- Two threaded terminals for the battery and starter cables
- Compact 46.5 x 33.6 x 48.4 mm body
Technical Specs
| Specification |
Detail |
| Part number |
RMS090-108569 |
| Height |
48.4 mm |
| Length |
46.5 mm |
| Width |
33.6 mm |
| Wire length |
460 mm |
| Number of wires |
2 |
| Number of terminals |
2 |
| Number of plugs |
1 |
| Function |
Starter relay solenoid switch |
Vehicle Fitment Guide
| Make & Model |
Years |
| Yamaha YFM 90 Raptor |
2009-2013 |
| Polaris RZR 170 |
2015-2021 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 43D-H1940-00-00 |
Yamaha |
| 0455028 |
Polaris |
Frequently Asked Questions
Will this fit without modification?
Yes. It is a direct replacement for the original solenoid on the machines listed above, using the same two-wire plug and the same pair of threaded terminals, so no cutting, splicing or drilling is required. Disconnect the battery before you begin, then transfer the battery and starter cables across one at a time so they cannot be swapped.
What is included?
The unit is supplied complete with its 460 mm two-wire control lead and plug. RMSTATOR do not list any additional hardware with this part, so re-use your original mounting rubber and terminal nuts if they are in sound condition.
How do I know my old starter relay has failed?
A failed solenoid usually gives a single loud click, or no sound at all, when the start button is pressed while the lights and dash stay bright - the control coil is pulling in but the main contacts are no longer passing current. Burnt or pitted terminals, a unit that buzzes instead of clicking cleanly, or an engine that will only turn over when the two terminals are bridged directly all point to the same fault.
Does the same part cover both the Yamaha and the Polaris application?
Yes. This single unit is listed against Yamaha OEM 43D-H1940-00-00 for the YFM 90 Raptor 2009-2013 and against Polaris 0455028 for the RZR 170 2015-2021. Check the number stamped on your original relay against those two references before ordering.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
