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Old 10-14-2008, 08:30 PM   #1
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Default O.S. .12 Speed

Just wondering at what stage would be recommended for replacement of the bearings in these motors as the rear is ceramic. Is it more the front bearing prone to failure,
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Old 10-15-2008, 12:10 AM   #2
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replace them when u get air leaks or they feel gritty when u rebuild the engine, replace them with the OS bearings.
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Old 10-15-2008, 06:36 AM   #3
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I've run 4+ gallons through some of mine with no problems. Just be sure to check them when you have the engine apart for cleaning.
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