mity max

Hello All ... my 72 combat with boyer and mity max starts and runs very well.The problem seems to be it isn't charging after, a run it goes on battery maintainer immediately so battery is always charged for me to go but does not seem to charge while riding.I have a new rotor and stator installed and can't find any sign of leak down when bike is resting.When bike is running @ 2000 rpm though my meter can't seem to read properly, I just see a jumble of numbers flashing on the meter screen if bike is resting I get a good steady 12.9-13.4 when charger is disconnected . Any IDEAS ???

Thanks for your time
Craig

Your digital meter is being RF'd by the ignition, get an old analogue meter and try that.

kommando said:

Your digital meter is being RF'd by the ignition, get an old analogue meter and try that.

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Never seen that. Fluke 77 for 20+ years... It may dither up or down some, easy to see the average though.
OP,
Your bike fitted with turn signals? Standard (non-LED lamps)? Engine idling, cadence is V E R Y S L O W... Revved up above 2,000 RPM, noticeably faster flash. Factory built-in voltage (charging) indicator.

As others say, a cheap digital multimeter won't read properly due to either ignition interference or spikes in the rectified (DC) output of the alternator (AC), or both. A more expensive digital meter will work (like a Fluke) & more or less any old analogue one will. Without something that gives sensible readings you have no idea where the problem lies.

Ian

If everything is working right even with a 27 watt headlight bulb you will not get charging happening until about 3000 RPM. On the highway this is not normally a problem. If you ride around town charging can be a problem, with the headlight on you may have to leave the bike in second or third gear to let the engine rev a bit more. During the day you could run a little pilot bulb instead of the main beam. With the headlight off or just a small pilot bulb the charging probably happens around 2000 RPM. Another thing that causes problems is almost all of the electronic ignitions use more power than the points did. I know Boyers and Ritas do anyway. I don't know about any of the newer systems.
If you have a more powerful headlight then you will need an high output alternator for your battery to remain charged.

I have a Mitty Max on one of my bikes, It works well. That bike has no battery though because it has mag ignition. So I don't worry about charging.

I check for charging with a volt meter and I find that works. Some of my bikes have an ampmeter as well, that shows you a lot about what is happening.

Thank you for all the replies.. for clarification no turn signals just brake lights,headlight (halogen) and horn.The headlight is switched and only on when needed.The ignition is Boyer micro analogue ,
.Like I said bike runs and works like a champ but if left off charger after ride I will have starting issues in the morning.Thanks again
Craig

Craig said:

Thank you for all the replies.. for clarification no turn signals just brake lights,headlight (halogen) and horn.The headlight is switched and only on when needed.The ignition is Boyer micro analogue ,
.Like I said bike runs and works like a champ but if left off charger after ride I will have starting issues in the morning.Thanks again
Craig

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Hi
basics first check the battery, charge and then leave off charge for a couple of days and then check the voltage with the headlamp on, if it's not over 12.5v take the battery to a store and have it load tested.
JohnT

24 hrs off charger all good so far easy one kick starting.
Craig

Struggling with this myself having binned two Sparx three phase regulators, have a boyer on the way... having been assured it's a top quality unit. Stator output is good, but apparently the manufacturing switch to Asia caused problems with the sparx... I know of more than one reputable dealer who have stopped carrying them for this reason

Where are you putting your leads when testing it?

I think that I get a nice stead read when going to the battery.

The rotor and stator are Sparx that I installed about 3 years ago. I place the leads from the meter directly on the battery terminals and I just see numbers flashing when engine is running when off I get a steady readout.
Craig

Another thing to check is run a feeler gauge between stator and rotor all around to make sure spacing is even and consistent all around as it does affect output. Also obviously check wires are tight and clean at connections. Battery age ? If there are dud asian made Sparx stators out there then put the original Lucas one back on and try that too.

Craig said:

24 hrs off charger all good so far easy one kick starting.
Craig

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Hi Craig
all well and good, but did you check the voltage at the battery terminals with the headlight on.
The idea behind the test is to see if the battery retains it's charge, without taking any power out until you test it!
JohnT

Should have added without the engine running, that way you will get a steady read on your digital meter.