
I have always maintained my own bikes and have used the o-rings in the large kit I received from Harbor Freight for many years. When that size ran out, I searched for the 'right' size to order (instead of buying another set from stock). They definitely fit the bill and appear to be the exact size the retailer uses. And MUCH cheaper. A pack of 50 will last another 120,000 miles as I change the oil every 5,000 miles and all 3 connections (engine, transmission, primary) every 10,000.

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