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The BSA A7-A10 Forum
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Lightweight valves
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Topic: Lightweight valves (Read 614 times)
Greybeard
Jack of all trades; master of none.
Wise & Enlightened
Join Date: Feb 2011
Posts: 9839
Karma: 49
Lightweight valves
«
on:
01.04. 2018 12:35 »
Anyone tried these special valves?
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Greybeard (Neil)
2023 Gold Star
Supporter of THE DISTINGUISHED GENTLEMAN'S RIDE
https://www.gentlemansride.com
Warwickshire UK
A Distinguished Gentleman Riding his 1955 Plunger Golden Flash
RoyC
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Join Date: Mar 2017
Posts: 1179
Karma: 10
Re: Lightweight valves
«
Reply #1 on:
01.04. 2018 12:50 »
Quote from: Greybeard on 01.04. 2018 12:35
Anyone tried these special valves?
Those are to protect your head gasket from blowing, they also prevent blowby if your rings are worn.
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My bike is a 1958 A7SS
Staffordshire UK
chaterlea25
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Join Date: Jun 2009
Posts: 4026
Karma: 54
Re: Lightweight valves
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Reply #2 on:
01.04. 2018 13:38 »
Improved gas flow is the main benefit
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1961 Super Rocket
1963 RGS (ongoing)
RichardL
Outside Chicago, IL
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Join Date: Nov 2007
Posts: 6387
Karma: 55
Re: Lightweight valves
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Reply #3 on:
01.04. 2018 15:23 »
Eases kicking for those of us with a troubled knee.
Richard L.
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berger
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keith.uk 500sscafe.norbsa JDM honda 750fz
Re: Lightweight valves
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Reply #4 on:
01.04. 2018 16:19 »
they are rotary valves
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Triton Thrasher
Scotland
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Join Date: Feb 2009
Posts: 1928
Karma: 23
Re: Lightweight valves
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Reply #5 on:
01.04. 2018 17:57 »
Interesting:
http://engineeringdesignsolutions.com/other/outside-the-box/
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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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Lightweight valves