Author Topic: switched points....1/4 wont close  (Read 1751 times)

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Offline flybox1

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switched points....1/4 wont close
« on: August 09, 2013, 07:01:37 PM »
Ok...I've had an aftermarket points and condenser set for a while, and it has treated me well.  I got a ND plate in a parts lot, and the points and condensers are definitely useable.  Thought I'dput them on.
I need to add that I have no dwell meter or timing light.  Just want to get gap set. I'll worry about advance later...
First, I mounted the nd points and condensers to my existing plate.  I guess this would be easier than swapping plates completely....first mistake? ::)
In the picture below, I'm at the step where I have rotated the big nut to F 2/3, to set my 2/3 point gap, but as you can see, my 1/4 point is still open.
Notice my whole points plate was, and still is, rotated max counter clockwise...
Where to go from here guys?
TIA.
fly...

« Last Edit: August 09, 2013, 07:20:36 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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"Knowledge without mileage equals bullsh!t" - Henry Rollins

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Offline MoMo

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Re: switched points....1/4 wont close
« Reply #1 on: August 09, 2013, 10:57:13 PM »
First question,  is that a wire connected to 2/3 backing plate?

Start over by setting the entire backing plate and the 2/3 plate so both are in the middle of the adjustment range.  A couple Spark plugs out so there is not any resistance when you rotate the crank.  Rotate crank past TDC of 1/4 till the post on the spark advance mechanism lines up with the indicator on the crankcase.  Set gap between  .012 to .016 thousandths.  Rotate crank past TDC of 2/3 till post lines up with the mark on the crankcase and set the gap.

Buy a timing light to finish setting the firing spot and advance. (I bought the $40 version of the Equus off Ebay to replace my old MAC light and it works fine) With the light hooked up to either  1 or 4 rotate the backing plate when the motor is running till it fires at the F mark and falls within the two marks when revved over 3K,  switch timing lead to 2 or 3 and adjust that backing plate till it fires and advances correctly.


You can set the firing statically with a multimeter but there isn't much better than using the timing light.   


Something has to be set wrong for the 1/4 gap to not close so I started at the beginning.  It is the process that has been used by all the mechanics that I have worked with during the 14 years I worked in the industry back in the heyday...Larry




Offline goldarrow

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Re: switched points....1/4 wont close
« Reply #2 on: August 10, 2013, 02:38:34 AM »
And make sure advancer is not 180 degree out
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0

Offline dave500

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Re: switched points....1/4 wont close
« Reply #3 on: August 10, 2013, 02:55:15 AM »
the more i see more points questions the more i like to try and push more electronic systems more,more or less,#$%*,do your self a favour,go electronic,they have more of a lot but a lot less adjusting,like nil once set,ive lost count of the points questions threads here,its obvisiously an issue,or problem?thats never been truley resovled,ever,is it in the FAQ?ditch the points losers!unless your a concours queen?

its always these same questions?
« Last Edit: August 10, 2013, 02:57:33 AM by dave500 »

Offline MoMo

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Re: switched points....1/4 wont close
« Reply #4 on: August 10, 2013, 03:02:53 AM »
the more i see more points questions the more i like to try and push more electronic systems more,more or less,#$%*,do your self a favour,go electronic,they have more of a lot but a lot less adjusting,like nil once set,ive lost count of the points questions threads here,its obvisiously an issue,or problem?thats never been truley resovled,ever,is it in the FAQ?ditch the points losers!unless your a concours queen?

its always these same questions?



But what if you're a trailer queen or maybe even a........................................................................................drag queen? :P ::) What kind of ignition would one use then? ...Larry

Offline dave500

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Re: switched points....1/4 wont close
« Reply #5 on: August 10, 2013, 03:30:42 AM »
a gay one,,like frigging around with points?over and again,trailer poofter bikes dont even have to run,they are too precious!fair dinkum,,how many points threads are there?man!you gotta have good ignition,and properly set up good condition points do that very well,im not doubting that,it just seems such a fiddle arse for some though that the #$%* is gone over and again,again,#$%* this,,,,,,,,,,,, im going for a beer!burrrrp,,thats better,#$%* this still though.

Offline flybox1

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Re: switched points....1/4 wont close
« Reply #6 on: August 12, 2013, 12:30:25 PM »
First question,  is that a wire connected to 2/3 backing plate?

Start over by setting the entire backing plate and the 2/3 plate so both are in the middle of the adjustment range.  A couple Spark plugs out so there is not any resistance when you rotate the crank.  Rotate crank past TDC of 1/4 till the post on the spark advance mechanism lines up with the indicator on the crankcase.  Set gap between  .012 to .016 thousandths.  Rotate crank past TDC of 2/3 till post lines up with the mark on the crankcase and set the gap.

Thanks Larry, this thread was supposed to be deleted as its in the wrong section of the forum, but anyway, i appreciate your answer, and the above is what i did, my queen is back running  ;D
And yes, the wire on 2/3 backing plate is the ground for my HM unit.
Out.
« Last Edit: August 12, 2013, 12:32:43 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline MoMo

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Re: switched points....1/4 wont close
« Reply #7 on: August 12, 2013, 12:32:11 PM »
Good and thanks for clariffying the wire( I like closure)...Larry