Motobecane 12v point gap and timing

Matty Lite /
2strokelyfe
Jul 12, 2020 02:05PM

I'm going off this great wiki page (https://www.mopedarmy.com/wiki/Guide_to_Motobecane_spark_and_timing#:~:text=Points%20gap%20should%20be%20.,this%20connection%20is%20often%20bad. and David Fixes His Shit on youtube to try and set point gap and timing on my 1979 motobecane. On a 6v, the point wires don't have to be disconnected, but in a 12v, they do. I disconnected the wires going to the points and put paper in between so my multimeter will read when I have continuity. Problem is, I can't get my multimeter to 1 when the points are open. I could do the cigarette paper method, but I have a multimeter and would rather get this precise. On a 12v system, is there something else I need to do to get an accurate reading and avoid grounding out?

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Re: Motobecane 12v point gap and timing

Den 23 /
den23
Jul 12, 2020 06:29PM

It is my experience that not going to zero is normal. If you had a test light connected instead of the multi-meter the light would dim but not quite go out completely. You're looking for a change in resistance at the correct timing.

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Re: Motobecane 12v point gap and timing

Pushrod Fifty /
supercub
Jul 12, 2020 07:26PM

I use an analog meter on the buzzer function, listening for the change in tone, gets lower when the points open because there is still some resistance. Makes easy becaise I dont have to be looking at a screen or light when lining up the flywheel. Ive checked my results a few times after with a timing light and the results always match. My meter is on its last leg but I cant find an analog meter that has the buzzer anywhere. The digital buzzer ones dont work for points.

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Re: Motobecane 12v point gap and timing

Matty Lite /
2strokelyfe
Jul 13, 2020 10:30AM

Thanks everyone for the comments! Not sure if the multimeter works on 6V but an accurate reading can be gauged on a 12v. Multimeter would jump around when the points opened so I used that and the cigarette paper method. Guess it was good enough and my Motobecane is finally running after a complete engine rebuild!

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Re: Motobecane 12v point gap and timing

Den 23 /
den23
Jul 13, 2020 10:33AM

My $5.00 multimeter is good for between0.0002v and 1000v DC. And 750v AC.

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Re: Motobecane 12v point gap and timing

P D /
pdcomm
Jul 13, 2020 11:08AM

> Den 23 Wrote:

> -------------------------------------------------------

> My $5.00 multimeter is good for between0.0002v and 1000v DC. And 750v

> AC.

Ha . My free HF meter does that , too . ;)

I generally use my more expensive meter and have the HF and a neat little analog meter for back up .

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