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
Magneto polarity
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: 50920" data-attributes="member: 2806"><p>It almost certainly would work with a magneto. However, a voltmeter would be enough. Some voltmeters have switches to reverse the polarity, and many allow the red lead to be plugged into the black socket (and vice versa). But, if you keep track of the polarities, set the voltmeter to DC and on a high setting (500V, or whatever), you could connect one lead to the housing and the other to the spark plug lead and do a test with only small risk to the voltmeter. If the magneto is off the bike, turn the armature by hand and let it flick past the position of maximum physical resistance on its own (i.e. at the lowest possible speed). If the voltmeter registers a negative pulse the polarity is correct. If it's on the bike do the same thing but with the plug removed from the engine to make it easier to turn the engine over slowly and controllably.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 50920, member: 2806"] It almost certainly would work with a magneto. However, a voltmeter would be enough. Some voltmeters have switches to reverse the polarity, and many allow the red lead to be plugged into the black socket (and vice versa). But, if you keep track of the polarities, set the voltmeter to DC and on a high setting (500V, or whatever), you could connect one lead to the housing and the other to the spark plug lead and do a test with only small risk to the voltmeter. If the magneto is off the bike, turn the armature by hand and let it flick past the position of maximum physical resistance on its own (i.e. at the lowest possible speed). If the voltmeter registers a negative pulse the polarity is correct. If it's on the bike do the same thing but with the plug removed from the engine to make it easier to turn the engine over slowly and controllably. [/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
Magneto polarity
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