This is a brand new starter relay solenoid switch for the Honda TRX quad range, supplied as a direct replacement for the original Honda unit. The starter relay is the high-current switch that connects the battery to the starter motor. Pressing the start button sends a small current through the relay coil, which pulls in a set of contacts and lets the full battery current through to the starter. On a working ATV that happens hundreds of times a season, and each cycle arcs across the contacts a little more until they pit, corrode or stick.
The quality of this replacement exceeds the OEM equipment, and every product shipped is tested before dispatch. It uses the original body size, the same two-wire trigger lead measuring 402 mm, two heavy-duty terminals and two plugs, so it mounts in the factory location and plugs into the existing loom with no cutting or splicing required. All item pictures are accurate - if you are in any doubt, compare this item directly against your original part, or check the Honda number stamped on the old relay against the cross reference table below.
Key Features
- Brand new aftermarket starter relay solenoid switch
- Quality exceeds the OEM equipment it replaces
- Every unit is tested before it is shipped
- Direct fit - no cutting, splicing or modification
- 402 mm two-wire trigger lead reaches the factory connector
- Two heavy-duty terminals and two plugs
- Compact 48 mm x 33 mm x 33 mm body
- Cross references three Honda OEM part numbers
Technical Specs
| Specification |
Detail |
| Part code |
RMS090-106184 |
| Component type |
Starter relay solenoid switch |
| Height |
48 mm |
| Length |
33 mm |
| Width |
33 mm |
| Wires length |
402 mm |
| Number of wires |
2 |
| Number of terminals |
2 |
| Number of plugs |
2 |
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 TRX 250 X |
2001-2024 |
| Honda TRX 400 EX Sportrax |
2001-2024 |
| Honda TRX 250 EX |
2001-2024 |
| Honda TRX 250 Recon TE |
2001-2024 |
| Honda TRX 250 Recon TM |
2001-2024 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 35850-HM8-A41 |
Honda |
| 35850-HM8-A30 |
Honda |
| 35850-HN1-A70 |
Honda |
Frequently Asked Questions
Does this need any modification to fit?
No. It is a direct replacement with the same 48 mm x 33 mm x 33 mm body, two terminals, two plugs and a 402 mm trigger lead, so it sits in the original bracket and connects to the standard Honda loom without any cutting or splicing.
What is in the box?
One brand new starter relay solenoid switch, tested before dispatch. Your existing battery lead, starter cable and mounting hardware are reused.
What are the signs of a failed starter relay?
A single sharp click and no crank, a machine that starts on some attempts and not others, or a starter that spins slowly despite a healthy battery. Contact damage inside the relay adds resistance, so voltage that should be reaching the starter is lost as heat in the relay body. If the relay itself gets hot after a few start attempts, that is a strong indicator.
Will this fit my TRX if the OEM number on my old relay is different?
This unit cross references Honda 35850-HM8-A41, 35850-HM8-A30 and 35850-HN1-A70. If your original carries one of those numbers it is the correct part. If it carries a different number, compare the body size and terminal layout, or contact our technical team before ordering.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
