New Rider
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Joined: Sept 29, 2020 13:58:40 GMT -5
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Post by vacationer on Sept 29, 2020 15:02:48 GMT -5
My stator is toast, so I'm looking to upgrade while I have the opportunity. 2009 50cc TGB Key West 2T originally with 4 pole stator. I'm hooking up a lot of lights/other appliances, so I need some serious output. I know that a stator upgrade can also require a new magneto/rectifier/possibly CDI.
Now, I'm very committed to figuring this out. There's plenty I don't know, but I learn very quickly. Manual gives very little info, but here's what I can tell you.
- The only info my manual gives about the current rectifier is "AC 13V,DC14.5V". I assume this means "AC 13V in and DC 14.5V out". - Current stator has 3 wires: 1 to CDI (distinct from pickup coil wire), 1 to rectifier, and 1 to rectifier/auto choke/lights. - Rectifier has 4 wires: those 2 from the stator, 1 to the battery/ignition switch, and 1 ground. - CDI has 5 wires: that 1 from the stator, 1 from the pickup, 1 from the ignition switch, 1 to the ignition coil, and 1 ground. - Ignition switch has 4 wires: that 1 to the CDI, that 1 from the rectifier, 1 to turn relay/horn/fuel gauge, and 1 ground.
Questions: 1. Does a 4-pole stator have fewer phases than an 11-pole? If so, will a matching magneto and a 3-phase rectifier solve this discrepancy? 2. What's it take to incorporate a full-wave rectifier into this scheme? 3. A 7-wire rectifier should be easy to incorporate into my existing wiring scheme, no?
If I seem clueless to you, don't give up on me. Condescend to me, but at least leave an explanation before you go. Thank you!
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Post by chewbaca on Sept 29, 2020 15:35:17 GMT -5
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New Rider
Currently Offline
Posts: 3
Likes: 0
Joined: Sept 29, 2020 13:58:40 GMT -5
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Post by vacationer on Sept 29, 2020 17:59:02 GMT -5
I've switched out my brake lights and blinkers with LEDs. Headlights and dash lights remain.
I ordered a playback module that's rated for 80Wx2 (stereo) plus 100W for the sub.
1. If I don't max out volume, I won't be using all 260W, correct? 2. As long as the resistor size can keep up with the output of the stator, what's the drawback of a more powerful stator? 3. And just to satisfy my curiosity, would increasing the engine's power, say with a big bore, also increase my ability to put out electrical power?
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Post by chewbaca on Oct 1, 2020 13:01:09 GMT -5
ah ok so the way it works is your stator should be sized to be just slightly more than you need to run your electric system and charge the battery a little tiny bit at a 700 to 1000 rpm idle. the voltage goes up with the rpm anything over 13.5v to 14v is dumped into a resister. this stops the voltage from going to high and damaging your stuff.
it doesn't stop the stator from pulling more and more power out of the engine as the rpm rises. unregulated would probably be something like 70v or 80v so at higher rpm large amounts of power are just dumped into that resistor and it can get very hot. I have seen them melt the plastic around them if not in a well ventilated place in the scooter.
you can't pull only the power you need out like you can with an automotive alternator. The scooter is basically running a permanent magnet generator that pulls a fixed percentage of available engine power and either supplies it to necessary electric components or dumps it into heat. so it directly slows you down all the time even with the radio off.
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