Starter Relay Solenoid for Yamaha YFM 250, 450, 700 & Suzuki GSX-R 600, 750 1999-2026
Starter Relay Solenoid for Yamaha YFM 250, 450, 700 & Suzuki GSX-R 600, 750 1999-2026
SKU:RMS090-102170
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Starter Relay Solenoid Switch - RMS090-102170
Yamaha YFM 250 / 450 / 700 and Suzuki GSX-R 600 / 750 / 1000 1999-2026
This is a brand new starter relay solenoid switch covering the Yamaha YFM 250, 450 and 700 quads and the Suzuki GSX-R 600, 750 and 1000. The solenoid is the heavy-duty switch that stands between the battery and the starter motor. When you press the start button, a small current energises the coil inside the solenoid, which snaps a set of high-current contacts closed and passes the full battery load to the starter. That arrangement keeps hundreds of amps out of the handlebar switch and its thin wiring - and it is why the solenoid, rather than the switch, is usually the part that eventually gives up.
This unit is built as a direct replacement to your original. It is a 45 mm wide, 50 mm long and 37 mm high body with four terminals and a single plug, and no wire tails to route, so it sits in the factory position and takes the existing cables and loom connection without modification. The quality exceeds the OEM equipment and all products shipped are tested before dispatch. It cross-references a long list of Yamaha and Suzuki part numbers, given in full below, which is the most reliable way to confirm fitment for your particular machine.
Key Features
- Brand new starter relay solenoid switch
- Direct replacement to your original unit
- Four terminals on a single plug - no wire tails to route
- Compact 50 x 45 x 37 mm body
- Covers both Yamaha quad and Suzuki sportsbike applications
- Cross-references ten Yamaha and Suzuki OEM numbers
- Quality exceeds the OEM equipment
- All products shipped are tested
Technical Specs
| Specification | Detail |
|---|---|
| Part Number | RMS090-102170 |
| Length | 50 mm |
| Width | 45 mm |
| Height | 37 mm |
| Number of Terminals | 4 |
| Number of Plugs | 1 |
| Number of Wires | 0 |
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 250 | 1999-2026 |
| Yamaha YFM 450 | 1999-2026 |
| Yamaha YFM 700 | 1999-2026 |
| Suzuki GSX-R 600 | 1999-2026 |
| Suzuki GSX-R 750 | 1999-2026 |
| Suzuki GSX-R 1000 | 1999-2026 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 5UG-81940-00-00 | Yamaha |
| 8GL-81940-00-00 | Yamaha |
| 5B4-81940-00-00 | Yamaha |
| 4D3-81940-00-00 | Yamaha |
| 31800-47E01 | Suzuki |
| 31800-47E00 | Suzuki |
| 31800-06G02 | Suzuki |
| 31800-06G01 | Suzuki |
| 31800-06G00 | Suzuki |
| 31800C47E00J000 | Suzuki |
Frequently Asked Questions
Will this fit without modification?
Yes. It is a direct replacement to your original unit on the listed machines. The 50 x 45 x 37 mm body matches the factory part and everything connects through the standard four-terminal plug, so it goes back into the original position with no cutting, splicing or rewiring.
What is included?
You receive the starter relay solenoid switch itself. It has no wire tails - all four terminals are served by the single plug - so there is nothing extra to route. The existing cables, fuse and rubber mounting on your machine are reused.
How do I know the old solenoid has failed?
A single sharp click with no starter rotation is the classic sign, as is no response whatever from the start button, or a starter that engages only intermittently. Check the battery is fully charged first and inspect the main fuse, which on many of these solenoids is carried in the unit itself. Corroded or loose cable ends at the solenoid give identical symptoms and are worth cleaning before you replace anything.
Is the same solenoid used on both the Yamaha quads and the Suzuki GSX-R?
Yes - Yamaha and Suzuki both use this four-terminal solenoid pattern, which is why the cross reference above carries the Yamaha 81940 numbers alongside the Suzuki 31800 numbers. Fitment is model specific, so read the part number printed on the solenoid currently fitted to your bike or quad and match it against the table before ordering.
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