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The BSA A7-A10 Forum
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A7 & A10 Engine
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A7 alloy head with bigger valves
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Topic: A7 alloy head with bigger valves (Read 1053 times)
route 66
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Join Date: Jan 2023
Posts: 44
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A7 alloy head with bigger valves
«
on:
30.05. 2023 09:13 »
Anyone know if there's enough room to fit super rocket valve seats in an A7 head? The combustion chambers seem to be the same size. Part number 67-1126.
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61 GF 58 SR
berger
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Join Date: Nov 2017
Posts: 3752
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5oo cafe , berger build norbsa ,
Re: A7 alloy head with bigger valves
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Reply #1 on:
30.05. 2023 12:37 »
you don't need to change the seats they get re cut this is my A7ss head with super rocket inlets and gas flowed by Mr Lenny Patterson of cylinder head shop.
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A10Boy
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Join Date: Jun 2008
Posts: 1078
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Solihull, Near Birmingham England.
Re: A7 alloy head with bigger valves
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Reply #2 on:
06.06. 2023 18:01 »
67-1126 is the early rocket head as you know.
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Regards
Andy
1958 Super Rocket
Plus
Harley Super Glide Custom
Yam XJR 1300
route 66
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Re: A7 alloy head with bigger valves
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Reply #3 on:
06.06. 2023 21:50 »
Actually I didnt know but after a lot of research I do now.I had assumed wrongly that the nr 67-1126 was just a newer version of 67-1122 which I knew to be an A7 head and so thought 67-1126 was an A7 head.
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61 GF 58 SR
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The BSA A7-A10 Forum
»
Technical (Descriptive Topic Titles - Stay on Topic)
»
A7 & A10 Engine
»
A7 alloy head with bigger valves