Yamaha 93306-30411 BEARING (fowlersparts.co.uk) £24 Yamaha 93306-30411-00 - BEARING (B6304) | Partzilla.com $29.97
Yambits : 93306-30411 for Yamaha bikes £13.99
That's just from a quick google search of the part number... Google is your friend (so is Yambits!).