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Honda Tiderls, Ural Solos & BMW R60/6
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Subscribed to learn .
 

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I've been a Mechanic a long time and the more I learn the more I realize how little I know .

Yesterday was a case in point ~ I'd installed LED dash bulbs in my old Mercedes and they created a dead short, long story .
 

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Nice diagrams ! .

? Is there a files place in this forum you can save them to and label what brand & model scooter they're for ? .

A Magneto is a simple alternating current producing device that uses permanent magnets instead of an energized rotor with slip rings .

All you needs do is : change the A/C current into D/C current via a full wave D/C bridge and some way to regulate the excess charge when the engine is sinning fast .

Zenier (? SP ?) diodes work well, they're a shunt but sometimes, like in vintage British Motocycles they go open circuit and allow unregulated current to invade the entire electrical system, why some older bikes have reputations for blowing the headlights out .

Older Honda Motos use the lead/acid battery to regulate the systems voltage, this is sort of like having a really BIG capacitor .

Lithium batteries don't do well in these simple charging systems that lack proper voltage regulation .

You scooter prolly has some minor fault you'll find in due time .
 

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Ah ;

Better the track down the problem I think .

If it has any relay, unplug them then test it , might be contacts fused closed or the spring failed ~ Chinese things fail a lot even when they're well designed .
 
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Danno ;

Interesting diagram in post #33, I think the "Electronic throttle" is in fact a shunt or zenier diode .

Pretty simple system there .
 

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Exactly .

Crude but as long as nothing breaks, very effective .

Of course, those old Brit bikes had the same thing and exploding headlights were a thing...
 

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The rectifier is only to ensure no AC current gets to the battery .

Headlight runs off AC current and is therefore much whiter & brighter .
 

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Thanx ~ I mis read the diagram .
 

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Could well be .

Dead batteries and short service life is why I have switched to AGM batteries .

The 5 year old battery in our 2015 Honda Civic went dead, I wonder if it's the end of life or what ~ I put a 1 ampere charger on it and will see tomorrow what gives .

SWMBO is tight with spending on things she doesn't Ken, if the battery is bad I'll go see what a new AGM one co$t$ and maybe buy it .

I dislike this Civic fairly intensely, why it sits for weeks or month at a time .

She'll drive her 1984 Mercedes Station Wagon with dead A/C all Summer but won't let me get rid of the Civic .

WOMEN ~ can't live with them, not allowed to shoot them.....
 

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Oddly enough I was jesting, I'm one of those few old guys who has a diamond and knows it .

I'll begin checking for AGM batteries tomorrow after I jot down the BCI group number .
 
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I wonder if the black rectifier you're looking at is mis wired or mis labeled ? .

If you have a meter you should be able to do a diode test to ensure you know which terminal does what .
 
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I hear you Sir ;

I get a lot of oddball electrical jobs after everyone else has given up .

I can't wait to learn what the problem was this job .
 
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