Author Topic: points gap for CB750 please  (Read 9655 times)

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Offline Scott

  • 72 CB750
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points gap for CB750 please
« on: December 01, 2011, 06:28:52 PM »
Hello
I have a 1972 CB750 and am wondering what the points gap should be and also is there any special technique to setting them
Thanks for your time
Scott

Offline seanbarney41

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Re: points gap for CB750 please
« Reply #1 on: December 01, 2011, 06:39:10 PM »
.012-.016 inches...turn crank until 1/4 points is at widest opening, set 1/4 gap...turn crank until 2/3 is at widest opening, set 2/3 gap...be sure and check timing afterwards, any change in gap  will affect timing...
If it works good, it looks good...

Offline Spanner 1

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Re: points gap for CB750 please
« Reply #2 on: December 01, 2011, 07:04:35 PM »
Sean+1... If I was you I'd 'jab' the kickstarter to turn the crank until you see 'F' mark ( 1+4) and then go 90 deg, past the 'F' mark and set the points gap to 14 thou. at that setting. 90 deg, past the 'F' mark for (2+3) also set @ 14 thou.  ;)... Timing is a separate issue, got that down O.K. ?
If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline Scott

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Re: points gap for CB750 please
« Reply #3 on: December 01, 2011, 09:03:37 PM »
thanks for that
for the timing does the whole points plate move to adjust timing.
Should I use a timing light or do you do it with a test light and the engine not running.
I think it's been almost 20 years since I've had to set timing but I think it will come back to me
Scott

Offline seanbarney41

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Re: points gap for CB750 please
« Reply #4 on: December 01, 2011, 09:08:43 PM »
...set 1/4 by moving the whole points plate...set 2/3 separately, there are two screws that enable the 2/3 points to move independantly of the whole plate, I find a test light to be just fine, and then sometimes double check with motor running and a strobe...this lets you check the advance also...
If it works good, it looks good...