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
B.T.H Mag-Dyno
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="billirwinnz" data-source="post: 139638" data-attributes="member: 1697"><p>Hi Peter</p><p>The bike runs and idles perfectly and once hot will start readily and idle on either front or rear cylinder. Tappets are all correctly adjusted.</p><p>For a long time I thought it was carburation as it would start hot but not cold. Friends with BTHs on post war twins had no problems but now I’ve learned that pre-war twins had lower kickstart ratios and the Oz replicas even lower due to belt primary drive. I believe that cold cranking speed is the problem especially as I’m not seeing spark holes in tissue paper placed between the plug points. Unless the cranking speed exceeds a certain value not enough power is produced to create a spark. Warm oil seems to be enough to make the difference.</p><p>Cheers Bill</p></blockquote><p></p>
[QUOTE="billirwinnz, post: 139638, member: 1697"] Hi Peter The bike runs and idles perfectly and once hot will start readily and idle on either front or rear cylinder. Tappets are all correctly adjusted. For a long time I thought it was carburation as it would start hot but not cold. Friends with BTHs on post war twins had no problems but now I’ve learned that pre-war twins had lower kickstart ratios and the Oz replicas even lower due to belt primary drive. I believe that cold cranking speed is the problem especially as I’m not seeing spark holes in tissue paper placed between the plug points. Unless the cranking speed exceeds a certain value not enough power is produced to create a spark. Warm oil seems to be enough to make the difference. Cheers Bill [/QUOTE]
Insert quotes…
Verification
What was Mr Vincent's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'A' 500cc/1000cc Bikes
B.T.H Mag-Dyno
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