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A7 & A10 Engine
A7 1946-1950
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Small end clearance
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Topic: Small end clearance (Read 336 times)
BSA500
Resident Legend
Join Date: Dec 2007
Posts: 925
Karma: 4
Tonbridge,Kent,UK
Small end clearance
«
on:
05.03. 2023 11:34 »
Hi,
Just another quick question what is the learance between the small end bushes and piston pin.I am having them fitted and ream by an engineering firm and need it to hand if they ask?
Ta muchly Andy
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1960 A7 (57 motor to SS spec)
RDfella
Wise & Enlightened
Join Date: Aug 2017
Posts: 2206
Karma: 15
Re: Small end clearance
«
Reply #1 on:
05.03. 2023 13:32 »
Should be able to push the pin through the rod by hand (virtually no clearance). May need to warm piston the do the same.
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'49 B31, '49 M21, '53 DOT, '58 Flash, '62 Flash special, '00 Firestorm, Weslake sprint bike.
Rex
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Join Date: Apr 2017
Posts: 1680
Karma: 8
Re: Small end clearance
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Reply #2 on:
05.03. 2023 17:16 »
Yep, the gudgeon (piston) pin should be a nice sliding fit in the small end. Any engineering firm worth it's salt will know this anyway.
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BSA500
Resident Legend
Join Date: Dec 2007
Posts: 925
Karma: 4
Tonbridge,Kent,UK
Re: Small end clearance
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Reply #3 on:
05.03. 2023 17:42 »
I'm sure they do just in case there was a figure.
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1960 A7 (57 motor to SS spec)
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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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A7 & A10 Engine
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Small end clearance