Don't use Engine Gears at all. They are horrible. Can you list which beyblades you have for us?
Also, check out the WD beywiki articles so you know which is which next time. http://wiki.worldbeyblade.org/index.php/...ight_Disks
Also, check out the WD beywiki articles so you know which is which next time. http://wiki.worldbeyblade.org/index.php/...ight_Disks