Thread: B5m diff and b4 diff
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Old 29-07-2015
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KRob KRob is offline
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Join Date: Dec 2005
Location: Swingrove
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It's never simple

The original B4 is imperial
The B4.1 / B4.2 are metric

And the B4.1 / B4.2 metric out drive bearing is a different size to the B5M outdrive bearing so not interchangeable.
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