This is a brand new starter relay solenoid switch for Kawasaki machines, supplied as a direct replacement for the original unit. The relay is the heavy-current switch between the battery and the starter motor. A small current from the start button energises the relay coil, which closes a pair of contacts and allows the full battery current through to the starter. Every start cycle arcs across those contacts, and over time they pit, corrode and lose their ability to carry current cleanly - which is why a starting fault on an older Kawasaki so often turns out to be the relay rather than the battery or the starter itself.
The quality of this unit exceeds the OEM equipment it replaces, and all products shipped are tested. It is a straight swap for the factory relay, using the same 50 mm x 40 mm x 40 mm body and the same two-terminal layout, so it mounts in the original position and reconnects to the existing cables with no cutting or splicing. Because Kawasaki used this relay design across a wide range of quads, side-by-sides and road bikes, the safest way to confirm fitment is to check the number stamped on your original relay against the cross reference table below.
Key Features
- Brand new aftermarket starter relay solenoid switch
- Quality exceeds the OEM equipment it replaces
- All products shipped are tested
- Direct replacement for the original unit
- Two heavy-duty terminals
- Compact 50 mm x 40 mm x 40 mm body
- Cross references five Kawasaki OEM part numbers
Technical Specs
| Specification |
Detail |
| Part code |
RMS090-102069 |
| Component type |
Starter relay solenoid switch |
| Height |
50 mm |
| Length |
40 mm |
| Width |
40 mm |
| Number of terminals |
2 |
| Installation |
Direct replacement |
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 |
| Kawasaki Bayou 300 |
1985-2026 |
| Kawasaki Brute Force 650 |
1985-2026 |
| Kawasaki Ninja 750 |
1985-2026 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 27010-0766 |
Kawasaki |
| 27010-0788 |
Kawasaki |
| 27010-1098 |
Kawasaki |
| 27010-1209 |
Kawasaki |
| 27010-1235 |
Kawasaki |
Frequently Asked Questions
Does fitting require any modification?
No. This is a direct replacement. The 50 mm x 40 mm x 40 mm body and two-terminal layout match the original, so it mounts in the factory position and the existing cables reconnect without cutting or splicing.
What is included?
One brand new starter relay solenoid switch, tested before dispatch. Existing battery and starter cables, nuts and mounting rubber are reused from your original unit.
How do I know the old relay is the problem?
Look for a single loud click with no crank, rapid machine-gun clicking, or starting that works when the engine is cold but fails once it is hot. If the lights stay bright when you press the button, the battery is not the issue. A relay with burnt contacts also tends to heat up noticeably after a few failed start attempts.
Are there any safety precautions when fitting it?
Yes. There is a risk of electric shock, so disconnect the battery before servicing and make sure the installation is carried out by a qualified technician. The relay terminals are permanently live to the battery even with the ignition off.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
