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
Ignition Timing Related Posts
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="Magnetoman" data-source="post: 107195" data-attributes="member: 2806"><p>The pinion<em> is </em>lapped onto the mag. I won't name names, but <em>someone</em> obviously screwed up when he tightened it...</p><p></p><p>The DBD34 in question is a U.S.-only 'Competition' model, supplied by BSA with 10:1 pistons. The same someone screwed up years ago when he had the chance to install a more reasonable 9:1. And yet I continue to allow him to work on my motorcycles...</p><p></p><p>Since I was in the middle of changing jetting and had just cut the #3 slide to make it a #3.33 the carburetor was the initial suspect in the bad running. Even if the DocZ hadn't been given to me for free, it would have paid for itself several times over in the pain and suffering I didn't endure while getting to the point where it was clear the problem was with the ignition, not the carburetor. Although it ran badly when started, at least it did start, and it's a lot easier to troubleshoot a motorcycle that runs, even if badly, than it is one that won't even start. There's no way I could have started it "manually" (leg-ally) once the timing had slipped.</p><p></p><p>If nothing else, getting the bike to the present point is a reminder that correlation does not imply causation. The bike started out running OK-ish, I changed the carburetor's internals, and it ran badly.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 107195, member: 2806"] The pinion[I] is [/I]lapped onto the mag. I won't name names, but [I]someone[/I] obviously screwed up when he tightened it... The DBD34 in question is a U.S.-only 'Competition' model, supplied by BSA with 10:1 pistons. The same someone screwed up years ago when he had the chance to install a more reasonable 9:1. And yet I continue to allow him to work on my motorcycles... Since I was in the middle of changing jetting and had just cut the #3 slide to make it a #3.33 the carburetor was the initial suspect in the bad running. Even if the DocZ hadn't been given to me for free, it would have paid for itself several times over in the pain and suffering I didn't endure while getting to the point where it was clear the problem was with the ignition, not the carburetor. Although it ran badly when started, at least it did start, and it's a lot easier to troubleshoot a motorcycle that runs, even if badly, than it is one that won't even start. There's no way I could have started it "manually" (leg-ally) once the timing had slipped. If nothing else, getting the bike to the present point is a reminder that correlation does not imply causation. The bike started out running OK-ish, I changed the carburetor's internals, and it ran badly. [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ignition Timing Related Posts
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