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
Everything Else (Not Vincent Related)
Counter Steering: Does Anybody Have An Explanation? - Demystification Required
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="oexing" data-source="post: 169228" data-attributes="member: 1493"><p>That Ducati ball bearing is 35-55-14.5 mm . Now imagine turning down the outer race for 50.5mm there will not be left much of the race, in any case very thinwalled. Not to speak of total height of 14.5mm that will not fit well in head lug recesses. One critical place is the recess for lower bearing which got a step of clearance of about 51 mm . So I see not much choice for taper types of turning down outer races for 50.5mm so as not to have the lug machined somehow. I surfed Ebay for some time and did not find suitable bearings for the standard stem of around 31.5 mm . There are Timkens of 48mm o.d. and 30mm i.d. suitable for the new Norman type stem, from Jap types, no old ball bearings on these, unless small and light bikes. </p><p> Anyway, the relieved recess of lower bearing is far from ideal for having a turned down taper type in there as it is not supported well . So far I can only see the BMW replacement 51-34-12 mm to go in there but with machined lower recess 51mm all the way for good support. And maybe the 48mm type with 30 mm i.d. suitable for the new stem to go with a decent adapter 48/51.5 mm . The BMW size is not suitable for turning down the o.d. as it is very slim already ! </p><p></p><p> Vic</p><p>[ATTACH=full]56360[/ATTACH]</p><p></p><p>[ATTACH=full]56361[/ATTACH]</p><p></p><p>[ATTACH=full]56362[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 169228, member: 1493"] That Ducati ball bearing is 35-55-14.5 mm . Now imagine turning down the outer race for 50.5mm there will not be left much of the race, in any case very thinwalled. Not to speak of total height of 14.5mm that will not fit well in head lug recesses. One critical place is the recess for lower bearing which got a step of clearance of about 51 mm . So I see not much choice for taper types of turning down outer races for 50.5mm so as not to have the lug machined somehow. I surfed Ebay for some time and did not find suitable bearings for the standard stem of around 31.5 mm . There are Timkens of 48mm o.d. and 30mm i.d. suitable for the new Norman type stem, from Jap types, no old ball bearings on these, unless small and light bikes. Anyway, the relieved recess of lower bearing is far from ideal for having a turned down taper type in there as it is not supported well . So far I can only see the BMW replacement 51-34-12 mm to go in there but with machined lower recess 51mm all the way for good support. And maybe the 48mm type with 30 mm i.d. suitable for the new stem to go with a decent adapter 48/51.5 mm . The BMW size is not suitable for turning down the o.d. as it is very slim already ! Vic [ATTACH type="full"]56360[/ATTACH] [ATTACH type="full"]56361[/ATTACH] [ATTACH type="full"]56362[/ATTACH] [/QUOTE]
Insert quotes…
Verification
The Series 'A' Rapide was known as the '********' Nightmare?
Post reply
Home
Forums
Forums: Public Access
Everything Else (Not Vincent Related)
Counter Steering: Does Anybody Have An Explanation? - Demystification Required
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