Beginner — under 30 min
Description
This steel pulley has an outer diameter of 5-1/8 inches with a flat outer diameter of 4-1/2 inches. Its overall width is 1-1/2 inches, with a flat width of 1 inch. The inner diameter, or bore, is 11/16 inches.
Fitment
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Specifications
| Brand | Oregon Tool |
| Part Number | O02Y 78-133 |
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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