External Ignition Coil CDI Module for Honda and Kawasaki Motorcycles - a new aftermarket cdi / ignition module, supplied ready to fit as a replacement for 21121-0721.
A failing CDI unit gives intermittent misfires, a rev limit that appears out of nowhere, hard starting when hot, or no spark at all.
Key Features
- 100% new aftermarket unit - not a remanufactured core
- Direct-fit replacement, no modification required on listed applications
- Cross-referenced to Honda, Kawasaki part numbers
- Built to meet or exceed the original equipment specification
- Dispatched from the UK with technical fitment support
Technical Specs
| Specification |
Detail |
| SKU / Part Code |
RM06162 |
| Component |
CDI / Ignition Module |
| Condition |
New aftermarket |
| Warranty |
12 months |
Vehicle Fitment Guide
| Model |
Years |
| Kawasaki KFX 450 R |
2008-2014 |
| Kawasaki KVF 750 |
2008-2014 |
| Honda TRX 500 |
2012-2013 |
| Honda CB 300 F |
2015-2016 |
| Honda CBR 300 R |
2015-2017 |
| Honda CTX 700 |
2004-2017 |
| Honda NC 700 |
2012-2017 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only and remain the property of their respective manufacturers.
| Part Number |
Manufacturer / Brand |
| 21121-0721 |
Honda |
| 21121-0725 |
Honda |
| 21121-0717 |
Honda |
| 21121-0716 |
Honda |
| 21121-0032 |
Honda |
| 21121-0039 |
Honda |
| 30510-HR0-F01 |
Kawasaki |
| 30510-K33-D01 |
Kawasaki |
| 30511-MGS-D31 |
Kawasaki |
| 30511-MJF-A01 |
Kawasaki |
| 30510-HR3-A21 |
Kawasaki |
| 30510-KYJ-901 |
Kawasaki |
Frequently Asked Questions
How do I know the CDI is at fault and not the coil?
Check for spark with a tester, then measure the ignition coil primary and secondary resistance and the pickup coil output. If coil and pickup test within specification and there is still no spark, the CDI is the usual cause.
Is this unit region specific?
Ignition curves differ between market versions. Match the OE number on your existing unit against the cross-reference table before ordering.
Is it a plug-in fit?
Yes - it uses the original connector and mounting on the models listed. No rewiring is needed.
What kills a CDI box?
Heat, vibration and voltage spikes from a failing regulator or a loose battery connection. Fix the underlying charging fault or the replacement can fail the same way.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
