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
"A" Comet Side stand
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="Thundercloud" data-source="post: 90013" data-attributes="member: 1521"><p>Like someone said (above) its the wheel size , springs etc., that determines the propstand length required. You can add a bit (you wont ever have to reduce the length) by whatever means you like . Bob Stafford was well aware of the deficincy and had castings produced with about two inches extra on the foot. This could be made more attractive by profiling it nicely in the lathe (after deciding the length you require) The " official" length was 8 7/8" from the pivot centre to the foot . this being the length as drawn by PEI in November 1931.for </p><p> The pre "A" Diamond frame models had the same basic dimensions as the "A"s but with a one piece cast iron pivot bracket rather than the later fabricated type. This did not affect the main dimensions , RFM pivot position etc but strangely the early brake pedal / propstand bracket had a SHORTER propstand mounting lug on it! This would have rendered the whole assembly even shorter. The 1931/2 models did tend to be fitted with 19" wheels and probably shorter rear springs (need to check) The early spring boxes and springs were supplied by Druids ( the fork makers ) and the spring boxes were fitted to their " Enclosed Spring " forks . Vincent obviously thought them a good idea and used them on his sprung rear end as well. For the real anoraks amongst you look closely at the springbox damper knobs on the very early models and you will see that they are stamped 1,2,3,4 to graduate the pressure applied . All a bit OTT given how quickly everything wore settled etc.,</p><p> Just to further complicate the issue I have p s legs on my 1936 TTC and my 1938 comet that are 9 1/4" so perhaps the factory recognised the problem later on and added a bit. This extra 3/8" seems to work on my machines but I have seen "A"s using up mosrt of the extra 2" provided by the Bob Stafford castings. Probably down to long Springs.!</p><p> Chers and Happy New Year</p><p> John Kidd</p></blockquote><p></p>
[QUOTE="Thundercloud, post: 90013, member: 1521"] Like someone said (above) its the wheel size , springs etc., that determines the propstand length required. You can add a bit (you wont ever have to reduce the length) by whatever means you like . Bob Stafford was well aware of the deficincy and had castings produced with about two inches extra on the foot. This could be made more attractive by profiling it nicely in the lathe (after deciding the length you require) The " official" length was 8 7/8" from the pivot centre to the foot . this being the length as drawn by PEI in November 1931.for The pre "A" Diamond frame models had the same basic dimensions as the "A"s but with a one piece cast iron pivot bracket rather than the later fabricated type. This did not affect the main dimensions , RFM pivot position etc but strangely the early brake pedal / propstand bracket had a SHORTER propstand mounting lug on it! This would have rendered the whole assembly even shorter. The 1931/2 models did tend to be fitted with 19" wheels and probably shorter rear springs (need to check) The early spring boxes and springs were supplied by Druids ( the fork makers ) and the spring boxes were fitted to their " Enclosed Spring " forks . Vincent obviously thought them a good idea and used them on his sprung rear end as well. For the real anoraks amongst you look closely at the springbox damper knobs on the very early models and you will see that they are stamped 1,2,3,4 to graduate the pressure applied . All a bit OTT given how quickly everything wore settled etc., Just to further complicate the issue I have p s legs on my 1936 TTC and my 1938 comet that are 9 1/4" so perhaps the factory recognised the problem later on and added a bit. This extra 3/8" seems to work on my machines but I have seen "A"s using up mosrt of the extra 2" provided by the Bob Stafford castings. Probably down to long Springs.! Chers and Happy New Year John Kidd [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'A' 500cc/1000cc Bikes
"A" Comet Side stand
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