Subject: Re: adjusted points...idles fast now
Author: Robert Hawkes
Date: Aug 26, 2002, 5:58 PM
Post ID: 1710885567
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Patrick,
That was an excellent description. Can you continue on account of I have an old strobe light I would like to use on my Ambo. Thanks, BOb
----- Original Message -----
From: Patrick Hayes
To: Loopfram-@topica.com
Sent: Monday, August 26, 2002 8:18 PM
Subject: Re: adjusted points...idles fast now
In a message dated 8/26/2002 3:45:07 PM Pacific Daylight Time, chris-@charter.net writes:
Whats an easy way to figure whaere they should be?
Since there are three equidistant holes in the pulley halves, they can be mounted in three positions. Only one is correct.
Remove both spark plugs. Remove the left side valve cover. Poke a wooden chopstick in the left cylinder spark plug hole. Slowly rotate the engin by hand at the front crankshaft nut. The engine turns couterclockwise at it travels through space. Or, it turns clockwise when you kneel in front of it and look backward towards the front of the motor. Watch the valve rocker action on that left side cylinder and feel the piston up and down with the chopstick. Watch the intake valve open and then close. As the pistonreaches the top, try to predict its point of TDC or Top Dead Center. You are now at cylinder number one, top dead center, of the compression stroke.
Return to your pulley and note the position of the notch or notches on the pulley. If there is only one notch, it had better be at the casting arrow. If you have several notches, the LAST notch should be at the casting arrow. When I say last, remember you were just rotating the engine. All of the notches are in the same quadrant of the pulley. TDC will be the last notch to reach the casting arrow as the grouping spins by.
As to the timing, you must use some kind of instrument. Not by ear or feel. The timing can be done static and the instrument can be as simple as a taillight bulb with wire pigtails. Turn on the key. Ground one side of the test lamp wiring. Attach the other wire to the points lead. Set the crankshaft on the last pulley notch BEFORE the TDC notch. Loosen and turn the distributor clockwise until the light goes out (=points closed). Now, turn the distributor back counterclockwise slowly until the light just ignites (=points open). Button everything up. You will have performed static idle timing. Not the best, but certainly good enough for most rides. Buy a strobe light and time dynamically for 4K rpm advance.
Patrick Hayes
Fremont CA
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<DIV><STRONG><FONT color=#000080 size=4>Patrick,<BR>That was an excellent
description. Can you continue on account of I have an old strobe light I
would like to use on my Ambo. Thanks, BOb</FONT></STRONG></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=p-@aol.com href="mailto:peha-@aol.com">Patrick Hayes</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=Loopf-@topica.com
href="mailto:Loopfram-@topica.com">Loopfram-@topica.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, August 26, 2002 8:18
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: adjusted points...idles fast
now</DIV>
<DIV><BR></DIV><FONT face=arial,helvetica><FONT size=2>In a message dated
8/26/2002 3:45:07 PM Pacific Daylight Time, <A
href="mailto:chris-@charter.net">chris-@charter.net</A>
writes:<BR><BR><BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"
TYPE="CITE">Whats an easy way to figure whaere they should be?
</BLOCKQUOTE><BR><BR>Since there are three equidistant holes in the pulley
halves, they can be mounted in three positions. Only one is
correct.<BR><BR>Remove both spark plugs. Remove the left side valve
cover. Poke a wooden chopstick in the left cylinder spark plug
hole. Slowly rotate the engin by hand at the front crankshaft nut.
The engine turns couterclockwise at it travels through space. Or, it
turns clockwise when you kneel in front of it and look backward towards the
front of the motor. Watch the valve rocker action on that left side
cylinder and feel the piston up and down with the chopstick. Watch the
intake valve open and then close. As the pistonreaches the top, try to
predict its point of TDC or Top Dead Center. You are now at cylinder
number one, top dead center, of the compression stroke.<BR><BR>Return to your
pulley and note the position of the notch or notches on the pulley. If
there is only one notch, it had better be at the casting arrow. If you
have several notches, the LAST notch should be at the casting arrow.
When I say last, remember you were just rotating the engine. All of the
notches are in the same quadrant of the pulley. TDC will be the last
notch to reach the casting arrow as the grouping spins by.<BR><BR>As to the
timing, you must use some kind of instrument. Not by ear or feel.
The timing can be done static and the instrument can be as simple as a
taillight bulb with wire pigtails. Turn on the key. Ground one
side of the test lamp wiring. Attach the other wire to the points
lead. Set the crankshaft on the last pulley notch BEFORE the TDC
notch. Loosen and turn the distributor clockwise until the light goes
out (=points closed). Now, turn the distributor back counterclockwise
slowly until the light just ignites (=points open). Button everything
up. You will have performed static idle timing. Not the best, but
certainly good enough for most rides. Buy a strobe light and time
dynamically for 4K rpm advance.<BR><BR>Patrick Hayes<BR>Fremont CA<BR></FONT></BLOCKQUOTE></FONT>
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