250R Electrical Question

[fahque99]

Does anyone know what the watt or amp output is on the stock 81 ATC 250R generator??

[fahque99]

...Anyone?

[Havoxx]

73w/7,600RPM

[fahque99]

Thanks. So only 6 amps then... Anyone know anything about rewinding them?

[TeamGeek6]

No, its not 6 amps at blah, blah. THis is not a DC system and that wont work. To get 6 amps, you divided 73/12, and its NOT a 12 volt system.

Its an AC system, and it doest work at one engine speed, so a rating at XXXX RPM is meaningless. Does the engine run at 7000 RPM all the time? No. So, whats the power output at idle???

The only figures that matter are the ratings at IDLE, because the output goes up beyond idle due to speed increase in the crank. On the 86R, the headlight works great on idle without the regulator, they absolutely explodes the filament at about 3000 RPM because the voltage runs away if the regulator is disconnected. So, the only thing that matters is the REGULATOR , and theres no data published on it.

The stator is 2 parts, ignition winding and lighting winding (ignoring the pulse generator). The ignition sides are very fine gauge wire (about 4000 turns on the 86 R), the lights side is probably 18 gauge.

Ive rewound the lights side, but never was able to do the ignition side, that takes a winding machine. Never could get enough wire back on the pole piece winding by hand.

[Havoxx]

No, its not 6 amps at blah, blah. THis is not a DC system and that wont work. To get 6 amps, you divided 73/12, and its NOT a 12 volt system.

Its an AC system, and it doest work at one engine speed, so a rating at XXXX RPM is meaningless. Does the engine run at 7000 RPM all the time? No. So, whats the power output at idle???

The only figures that matter are the ratings at IDLE, because the output goes up beyond idle due to speed increase in the crank. On the 86R, the headlight works great on idle without the regulator, they absolutely explodes the filament at about 3000 RPM because the voltage runs away if the regulator is disconnected. So, the only thing that matters is the REGULATOR , and theres no data published on it.

The stator is 2 parts, ignition winding and lighting winding (ignoring the pulse generator). The ignition sides are very fine gauge wire (about 4000 turns on the 86 R), the lights side is probably 18 gauge.

Ive rewound the lights side, but never was able to do the ignition side, that takes a winding machine. Never could get enough wire back on the pole piece winding by hand.

Heh, I don't know, that's just what it says on the book ;P oh, heh, never mind, you said theres nothing published on the regulator, though I was curious about that, why in the world would the make the electrical system ac-DC when it should just be DC, or is that the only way it can work while spinning around?

[fahque99]

I have exploded a few light bulbs at first so I know what you mean haha. And a regulator/rectifier isnt too hard to build so thats not what I am worried about. My main problem is that I have an idea for fuel injection and the biggest problem seems to be the fuel pump. The flow rate is not alot for only one injector, but the current draw on large pumps it quite high. So I need to figure out a small pump that is sized for only one injector and very low current draw. Any ideas for a pump?

[Havoxx]

I have exploded a few light bulbs at first so I know what you mean haha. And a regulator/rectifier isnt too hard to build so thats not what I am worried about. My main problem is that I have an idea for fuel injection and the biggest problem seems to be the fuel pump. The flow rate is not alot for only one injector, but the current draw on large pumps it quite high. So I need to figure out a small pump that is sized for only one injector and very low current draw. Any ideas for a pump?

Why not try one of those little water fountain pumps? They're quite small, shouldn't draw too much. If not maybe a fish tank pump, those are essentially just a mini-motor and diaphragm.

[fahque99]

The problem with those is that they run on 115v and they need to build around 30psi for the injectors. Mabey a washer fluid pump?