33cc Saloor/Chinese Gas Scooter Wiring Issues/Rectifier?

[autoxbrian]

I bought a 2003 Saloor Gas scooter identical to the one below. (I am at work without a picture of it at this moment).



After scouring the internet for schematics, or wiring diagrams, I have found zero that have the components that this one has. All of them I found have a CDI controller, and/or other more involved electronics.

In the belly of this scooter is the battery, starter relay (electric and pull start) a voltage regulator/rectifier, and the 3 pin AC Charger port (looks like a mic/XLR outlet).

The only wiring to the 33cc motor is the starter wire, and a 20awg pair of wires that I traced to realize this was the 'kill switch' to ground out the motor when key is put into the off position.

Issue is that when plugging in the proper charger into the scooter, the rectifier HUMS LOUDLY,  so I bought the identical (in appearance) rectifier off of eBay, and after using a volt meter found out this one is definitely wired differently, (I kept blowing a 10AMP in line fuse anytime it was plugged in).

My question is what is the voltage regulator used for/needed for when

1. there is no CDI and apparently no AC charging system
2. The wall charger puts out under 1amp 12v DC to trickle charge/maintain the battery.

Only 'electronic' bit on the bike is a headlight.

I continue to look for diagrams or schematics, but they all have wires to/from CDI, wires from the stator, coil, etc... Can someone help me know what I should be finding on the 4 pins of the rectifier? BTW, my wire colors do NOT match all the ones I see online.

Wires on mine? red, yellow, green, green...

Thanks for the help, or any direction you can provide.. There IS continuity between 2 pins (top/bottom on left side) on the old rectifier, new one I bought it is top/bottom on the right side...

[90GTVert]

I wonder if what you have is perhaps a battery charger adapter of some sort?

The big step-through scooters have stators that produce battery charging and lighting power. They need a rectifier (in most cases) to convert AC current from the stator to DC current. The regulator regulates voltage to appropriate levels. I don't see the need for this on a scooter such as yours, which has no electrical output. Your only electrical power should be from the battery, which shouldn't need to be rectified/regulated before being distributed to the lights or horn or any typical 12V accessory.

Can you get a pic of the part in question for us at some point?

Whatever it is, it should not be related to the engine. The engine is basically self-contained as far as electrical. As you have seen, the only external electrical input is a kill switch that grounds out the ignition to stop it from running.

[autoxbrian]

Exactly, and the scooter runs just fine without any wires involved.



no markings on the bottom either, no numbers, etc. seems to be the same as the bigger (49cc type) scooters..

Yeah, that was my understanding of a regulator/rectifier, and reason I thought it was pointless on a bike like this.. I could rewire it without it at all, dare I?

[autoxbrian]

So no other ideas on the topic sadly... I can tell you the 4 wires going to the 4pin rectifier/regulator are: 12v+, 2 ground wires (yes that is correct), and yellow wire going to the starter relay...

[90GTVert]

I did find a wiring diagram that seems to match up to what you're working with...
www.neoscooters.com/maintenance/wiringdiagram.gif

You may have the wrong connections. Even when buying rectifiers/regulators that are supposed to be for certain models the connections aren't always in the same order. Here are a couple ideas that may be of use for seeing if this one can work for you...
49ccscoot.proboards.com/thread/410/testing-4-prong-rectifier
49ccscoot.proboards.com/thread/1795/chinese-1e40qmb-regulator-rectifier-wiring