Honda CRF450R Rear Brake Disc
New aftermarket rear brake rotor for Honda CRF450R motorcycles with the matching four-bolt 240 mm disc layout.
Vehicle compatibility
| Honda model | Years | Position |
|---|---|---|
| CRF450R | 2002–2025 (published aftermarket reference) | Rear |
Model generations can use different Honda genuine disc part numbers despite the shared aftermarket rotor dimensions.
Reference dimensions
| Outside diameter | 240 mm |
|---|---|
| Centre bore | 121 mm |
| Nominal thickness | 4 mm |
| Published comparable minimum thickness | 3.5 mm (confirm actual disc markings) |
| Mounting | Four straight M6-type holes, approximately 6.5 mm diameter |
| Bolt pitch circle | 140 mm PCD |
| Position | Rear |
These are reference dimensions for the matching MTX MDS01033 / EBC MD6191-style family. Check actual stock dimensions and disc markings before installation.
Application and interchange references
- Honda early CR/CRF rear disc: 43351-KZ4-J40 (original application family)
- Alternative Honda references: 43351-KRN-A30 / 43351-KRN-A90 on selected CRF models
- Aftermarket cross-references: MTX MDS01033, EBC MD6191C / MD6191D, Delta Braking DBD005, ProX 37.BD21202, Armstrong BKR232
These are catalogue application numbers for dimensional matching, not proof that every Honda factory disc across all listed years has the same Honda part number. The supplied item is an unbranded aftermarket replacement.
Included
One rear brake rotor. Mounting bolts are not specified as included.
Important fitment check
Compare the old disc before buying: outside diameter, 121 mm centre bore, 140 mm PCD, four M6-type fixing holes, nominal 4 mm thickness and rotor offset. Several Honda front discs are also 240 mm but have completely different mounting dimensions. Replacement rotor fitment is not the same as an OEM supersession claim.
Condition
New, unused aftermarket brake disc.