Beginner — under 30 min
Description
MIA's Description
These A-Series aluminum bearings feature upper and lower grooved bearing locations with a 1/2 groove style. They are available in standard and various undersizes, including 10, 20, 30, 40, 50, and 60.
The MA Series main bearings are made with silicon to provide greater surface hardness and can help polish crankshaft journals, reducing or eliminating bearing wear. They meet or exceed OEM specifications.
Fitment
Fitment Guaranteed
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Available on iOS & Android
Specifications
| Brand | SEALED POWER |
| Part Number | S03T 4923MA 40 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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