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 'B' / 'C' 500cc/1000cc Bikes
ET35 to valve guide clearance
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="davidd" data-source="post: 126687" data-attributes="member: 1177"><p>Bill,</p><p></p><p>Frankly, I don't remember spending so much time fitting these bolts to earlier projects, but it looked to me like the parts were exactly the same. I don't like grinding away the top cord of the rocker arm, but I was very careful to try and preserve as much strength as possible. The Comet engines have always run to high RPMs without problems.</p><p></p><p>I have always used the Ian Hamilton designed piston. Carleton Palmer started racing before I did, so I purchased spare pistons from him. He encountered a few problems with the design. He moved the ring lands lower and closer together. He could do this easily with the use of thinner and better rings. Second, he enlarged the valve pockets. </p><p></p><p>I would have expected that the same could be done easily for other Vincent pistons. I am a little surprised that there is any problem with the valve to piston clearance as the stock pistons are so low in compression. The Hamilton design is 11.23:1 and is quite top-heavy. The pistons tend to scuff as a result. Surprisingly, I have never had a valve touch except when the big end failed.</p><p></p><p>[ATTACH=full]37001[/ATTACH]</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 126687, member: 1177"] Bill, Frankly, I don't remember spending so much time fitting these bolts to earlier projects, but it looked to me like the parts were exactly the same. I don't like grinding away the top cord of the rocker arm, but I was very careful to try and preserve as much strength as possible. The Comet engines have always run to high RPMs without problems. I have always used the Ian Hamilton designed piston. Carleton Palmer started racing before I did, so I purchased spare pistons from him. He encountered a few problems with the design. He moved the ring lands lower and closer together. He could do this easily with the use of thinner and better rings. Second, he enlarged the valve pockets. I would have expected that the same could be done easily for other Vincent pistons. I am a little surprised that there is any problem with the valve to piston clearance as the stock pistons are so low in compression. The Hamilton design is 11.23:1 and is quite top-heavy. The pistons tend to scuff as a result. Surprisingly, I have never had a valve touch except when the big end failed. [ATTACH type="full"]37001[/ATTACH] David [/QUOTE]
Insert quotes…
Verification
The Series 'A' Rapide was known as the '********' Nightmare?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ET35 to valve guide clearance
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