The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'A' 500cc/1000cc Bikes
Split collets
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="A_HRD" data-source="post: 111945" data-attributes="member: 49"><p>Well actually no, Marcus, it's not <u>my</u> knowledge; I was merely quoting the findings and knowledge of the late great Bob Stafford. </p><p></p><p>But the Series 'A' spring collet issue doesn't end here. I have several crusty old used (original?) valves and some old stock new ones too. All have the correct "squared" 90 degree interface between the large and small stem diameters to take the correct "squared top" collets. Great. </p><p></p><p>But I also have some new Series 'A' valves which I purchased in the UK about 2 to 3 years ago. These are most probably manufactured by the G & S valve company. However, whoever got them made(?), forgot to specify the need for the stem interface to be square; what they actually have is a small taper for about 1/32". So, if you intend to use standard 'A' collets on a standard set-up (and why wouldn't you?), each valve needs that tiny taper machining square on a lathe with a very sharp tool. </p><p></p><p>Anyone in the process of, or about to start, head-building - would be wise to check what they have in respect of collets and valves. </p><p></p><p>Peter B</p></blockquote><p></p>
[QUOTE="A_HRD, post: 111945, member: 49"] Well actually no, Marcus, it's not [U]my[/U] knowledge; I was merely quoting the findings and knowledge of the late great Bob Stafford. But the Series 'A' spring collet issue doesn't end here. I have several crusty old used (original?) valves and some old stock new ones too. All have the correct "squared" 90 degree interface between the large and small stem diameters to take the correct "squared top" collets. Great. But I also have some new Series 'A' valves which I purchased in the UK about 2 to 3 years ago. These are most probably manufactured by the G & S valve company. However, whoever got them made(?), forgot to specify the need for the stem interface to be square; what they actually have is a small taper for about 1/32". So, if you intend to use standard 'A' collets on a standard set-up (and why wouldn't you?), each valve needs that tiny taper machining square on a lathe with a very sharp tool. Anyone in the process of, or about to start, head-building - would be wise to check what they have in respect of collets and valves. Peter B [/QUOTE]
Insert quotes…
Verification
The Series 'A' Rapide was known as the '********' Nightmare?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'A' 500cc/1000cc Bikes
Split collets
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top