This V-belt primary roller fits:
HR21 SDA LAWN MOWER, JPN, VIN# HR21-1000001 TO HR21-1051093
HR21 SXA LAWN MOWER, JPN, VIN# HR21-1000001 TO HR21-1051093
HR21-5 SDA LAWN MOWER, JPN, VIN# HR21-5-1019070 TO HR21-5-9999999
HR21-5 SDAM LAWN MOWER, JPN, VIN# HR21-5-1019070 TO HR21-5-9999999
HR21K1 SDA LAWN MOWER, JPN, VIN# HR21K1-1100004 TO HR21K1-1127597
HR21K1 SXA LAWN MOWER, JPN, VIN# HR21K1-1100004 TO HR21K1-1127597
Not in original packaging
If there's even a chance you'll need this/these replacement part(s) in the future you'd better get them NOW!. Keep this in mind, replacement parts are always good to have. When you decide to sell your Honda, including a few extra replacement parts always sweetens the deal for both buyer and seller.