I build and rebuild small 2 stroke motors. The 6001 Nachi open bearing is the best for replacing the stock lower case crank bearings. I've been using them for over 4 years on 7 different motors that I race large scale RC off road with and they have never failed once.
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Best bearings for rebuilding small motor
October 26, 2010
BBButch from Redding, CA.
These are the top of the line bearings to rebuild the lower case of Zenoah and CY motors. I've used more expensive bearings that did not last as long as the Nachi bearigs. Now that I have experienced these bearings I will never go back.