The Shimano Bantam Mag is one of the great older reels out there . I have personaly used them since 1984 - I learned to use a baitcaster with one . I current have 3 and use one on a Kistler rod for spinnerbaits . I believe they only have 1 main bearing and the rest are bushings . They are fairly easy to clean and grease and if you want to improve on it I would replace the dogear that stops the reel from backreeling { try calling Bass Pro Shops for a replacement } clean and re-grease all gears . Bass Pro might have replacment drag washers also . Make sure they stay dry ! The only reel I have found that works better is the Shimano Chonarch SF - it will cast as far or farther than the Bantam . For the best action watch eBay for someone listing a brand new one that has been stored , it will be pricey but worth it .
Tight lines !:)