The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: bikerjohndavies on 17.12. 2019 12:50
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Does anybody know the standard outside diameter for a A10 small end bush. I have 2 that I want to use but one measures about 7 thou larger OD than the other. Not sure if its just bad manufacturing or maybe one is oversized.
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This table from the 1966 Alpha Bearings catalogue may help.
The A10 bush is SE109 right at the bottom ofthe photo.
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Or have a look at BSA Service sheet 702
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Thanks guys, the Alpha list is a great help. The service sheet 702 only shows the ID and I need the OD. Have now measured them with a micrometer and the smaller one measures .878 so standard whilst the other is 10 thou larger. At least now I know what I have to work with. Cheers,