This page will give explanations of the types of bearings and there real performance effects on the yo.

All my yo's have ABEC3 bearings that I get from a local hobby shop in my area. They appear to be the same as the Team Losi bearing that I have in my Cherry Bomb. I've been very pleased with the performance. From my experience, they seem to be more consistant over their life; whereas the Yomega bearings I've found loose their performance more noticably and sooner than the ABEC3 bearings. I'm talking a lot of use, not just and occasional session. Keep that in mind if/when you think you want to upgrade the bearings.

Here are a list of ABEC7 bearings, that will work on most bearing yo's.

Here is the company that sells them:

http://www.mpcomponents.com/Catalog/
STOCK NUMBER
BORE
DIAMETER
WIDTH
PRICE
COMMENTS
E1-4
.1875"
.5000"
.1562"
$5.21
for SSII
E1-5
.1875"
.3750"
.1250"
$4.76
for AXL
E15-S7
.1875"
.3125"
.1250"
$5.77
for Triple Play mod
E14-S7
.1562"
.3125"
.1250"
$5.77
for Team Losi Spintastics & most Yomegas