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Author Topic: Small end clearance  (Read 815 times)

Offline BSA500

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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)

Offline RDfella

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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.

Online Rex

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Re: Small end clearance
« 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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Offline BSA500

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Re: Small end clearance
« 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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