Author Topic: Setting crank end float  (Read 149 times)

Offline Rckt3

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Setting crank end float
« on: October 06, 2020, 11:26:57 AM »
Hello all, Iím currently working on a Ď69 bsa 650 lightening and Iím looking for some info or procedure on setting the crank end float. I hope Iím in the right area for this request.
2005 rocket 3
2006 R1200rt
1969 BSA 650 lightening

Offline iansoady

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Re: Setting crank end float
« Reply #1 on: October 06, 2020, 02:05:19 PM »
Is it not in the manual? Normally you need a dial indicator (clock gauge) so that you can set that up on the crank end.

Many years ago I was building an A series BMC engine and an elderly Bengali neighbour showed me how to check the end float by tapping the end of the crankshaft with a lump hammer and judging how far it moved by the sound. But you probably want something more sophisticated.
Ian
1952 Norton ES21955
Francis Barnett Cruiser 75

Offline Rckt3

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Re: Setting crank end float
« Reply #2 on: October 06, 2020, 03:52:21 PM »
Hey Ian thx for the reply, no mention of how to set it in the Haynes manual I have, just the specification .0015-.003Ē. I want to make sure I have it right before putting it all together,,,,,again.
2005 rocket 3
2006 R1200rt
1969 BSA 650 lightening

Offline iansoady

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Re: Setting crank end float
« Reply #3 on: October 06, 2020, 04:05:46 PM »
I'd never rely on a Haynes... Is there not a proper BSA book? On engines I've built there are usually shims behind the drive side bearing outer.

How about here: https://www.bsaclub.com/?page_id=21
Ian
1952 Norton ES21955
Francis Barnett Cruiser 75

Offline Rckt3

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Re: Setting crank end float
« Reply #4 on: October 06, 2020, 05:35:16 PM »
Yep, definitely more detailed than a Haynes manual, thx for the link.
2005 rocket 3
2006 R1200rt
1969 BSA 650 lightening