Look for a part number on the bearing. They should be available from a bearing shop. I know the 80 onwards ones are just a plain IKO needle roller and can be bought from a bearing shop. If that fails you can always order them as a Suzuki Genuine part, but one thing i can tell you is that with the late model PE250 bearings they are cheaper as a aftermarket item than a suzuki one and they are the same identical IKO bearings from IKO Japan.