Steering Bearing 26 x 48.5 x 15 30 x 50 x 14.25
1974 - 78 CB550F
http://www.z1enterprises.com/detail.aspx?ID=2778
also i couldnt find the wheel bearings.....
The second link is the All Balls kit. Their part number is AB22-1011, and 22-1011 is All Balls part number. A Google search may turn up a slightly cheaper source. I think I got mine shipped for just under $40, but I can't recall the seller right now. Not a huge saving, but every little bit helps.
The wheel bearing numbers are listed on the parts fiche at Bike Bandit, Motogrid, etc. The Motogrid listing looks something like this:
58 96140-63020 BEARING (6302U) $9.08
59 96140-63040-10 BEARING (6304U) $12.89
60 96140-63050-10 BEARING (6305U) $14.27
The numbers you're interested in are the ones in parentheses, in this case 6302, 6304, and 6305. The 6302 is for the front wheel and you need 2, the 6304 and 6305 are for the rear wheel and you need one of each. The factory bearings are only sealed on one side, it would be best to replace them with bearings that are sealed on both sides. To find the right ones just add "-2RS", for 2 rubber seals, to the numbers above (e.g. 6302-2RS).
You can buy them from a dealer, Z1, or an online bearing supplier (I bought mine from
http://www.vxb.com/ , They had a good price on some swanky Japanese ones and Google checkout). If you have a bearing supply house near you they'll be able to hook you up, too.
Read up on the various methods for removing the bearing retainers from the wheels. It's not super difficult, but it needs to be done correctly to keep from boogering up the hubs.
I can't advise you on the swingarm bushings, mine seemed to be in good shape so I just cleaned all the ratty old grease out and put it all back together. I did replace the grease nipples on the swingarm pivot bolt with modern fittings to make maintenance easier.
Keep asking questions and good luck,
~john