Transmission Gear
The part is cataloged under the transmission assembly as the countershaft sixth gear. Its designation identifies both its shaft location within the transmission and its sixth-gear function.
Honda · Genuine OEM Part
This genuine Honda gear is identified in the parts catalog as GEAR, COUNTERSHAFT SIXTH (34T). It is listed in the transmission assembly as the sixth-gear component associated with the countershaft.
The gear transfers power through the transmission when sixth gear is selected. The catalog identifies the part as a 34-tooth gear and lists one required unit in the transmission parts table. No material, finish, color, or dimensional information was verified in the sources reviewed.
The part is cataloged under the transmission assembly as the countershaft sixth gear. Its designation identifies both its shaft location within the transmission and its sixth-gear function.
Honda's catalog description specifies a 34-tooth gear. That tooth count is the verified technical detail used to distinguish this component from the other transmission gears.
The Honda part number identifies this specific sixth-gear component. Ordering by the complete number helps distinguish it from other countershaft gears listed in the same transmission assembly.
The same entry names it GEAR, COUNTERSHAFT SIXTH (34T), while the required-quantity columns show one unit. The catalog separately lists the mainshaft sixth gear and its spline collar, confirming that this part is the countershaft gear rather than either adjacent component.
| Honda Part Number | 23521-MKR-D10 |
|---|---|
| Honda Catalog Description | GEAR, COUNTERSHAFT SIXTH (34T) |
| Part Type | Gear |
| Assembly | Transmission |
| Tooth count | 34T |
| Required quantity | 1 |
| Model | Type | Model Years |
|---|---|---|
| CBR1000SP | Motorcycle | 2021–2023 |
Model applications as listed in Honda's dealer parts catalog for part number 23521-MKR-D10.
Verify the Honda OEM part number for your specific model before ordering.
Compatible motorcycles, ATVs & side-by-sides
Verify your vehicle's model, year and specific configuration before ordering.