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Post by lostforawhile on Nov 16, 2017 14:39:57 GMT -5
I guess I'll order one tomorrow, if anyone can beat 30 bucks let me know and I'll PayPal you. It's an 8 pole, there is just nothing else,if a good pickup won't generate voltage with the engine spinning it's got to be that flywheel, I never get normal broken crap
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Post by tortoise2 on Nov 16, 2017 15:00:59 GMT -5
beat 30 bucks . . 8 pole . . flywheel Hope "the issue" does not turn out to be a deficient wiring job after relocating the CDI. |
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Post by aeroxbud on Nov 16, 2017 15:29:01 GMT -5
i hope the new flywheel will sort it. This has been A very frustrating problem.
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Post by lostforawhile on Nov 16, 2017 16:19:45 GMT -5
beat 30 bucks . . 8 pole . . flywheel Hope "the issue" does not turn out to be a deficient wiring job after relocating the CDI. it's dead right off of the pickup,there is nothing else hooked to it, but the wire from the pickup and a ground from the case next to it, and my wiring is fine,I've checked everything,it's all soldered and heat shrunk.ive even changed the crappy stator connectors to genuine Delphi weatherpacks. It all checks good,145 ohms on the pickup from output lead to ground,right where it should be |
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Post by lostforawhile on Nov 16, 2017 16:21:23 GMT -5
i hope the new flywheel will sort it. This has been A very frustrating problem. there is just nothing else it can be, no voltage from a tested good pickup, with nothing connected to it but meter. |
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Post by lostforawhile on Nov 17, 2017 15:18:33 GMT -5
you are exactly correct, everyone says the flywheel can't affect the pickup, but with magnetic fields that strong, it definitely affects it. I found a picture of a flywheel with a cracked magnet, and the inner metal cover removed from the magnets, and one of the poles are lined up with the raised part of the flywheel, any time you have powerful magnets attached to a metal ring like that, it creates a field where the magnets are. the pickup can generate a voltage by just interrupting it's field , with the flywheel tag, but the additional fields of the pole magnets increase that voltage, saying that the field magnets have no effect is ignoring the laws of magnetism, , you may not be able to stick anything to the flywheel tab, but there is a magnetic field sweeping past that pickup, it can't trigger the ignition by itself, but it can increase the induced voltage when the metal tab cuts the field of the permanent magnet in the pickup.
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Post by lostforawhile on Nov 17, 2017 15:26:16 GMT -5
 when the new flywheel gets here, and I dismantle the old one, I suspect this is what I'll find, the metal cuts a lot of the magnetic flux, but it's still there, and is enough to help increase the induced voltage in the pickup. |
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Post by gsx600racer on Nov 17, 2017 15:27:31 GMT -5
you are exactly correct, everyone says the flywheel can't affect the pickup, but with magnetic fields that strong, it definitely affects it. I found a picture of a flywheel with a cracked magnet, and the inner metal cover removed from the magnets, and one of the poles are lined up with the raised part of the flywheel, any time you have powerful magnets attached to a metal ring like that, it creates a field where the magnets are. the pickup can generate a voltage by just interrupting it's field , with the flywheel tag, but the additional fields of the pole magnets increase that voltage, saying that the field magnets have no effect is ignoring the laws of magnetism, , you may not be able to stick anything to the flywheel tab, but there is a magnetic field sweeping past that pickup, it can't trigger the ignition by itself, but it can increase the induced voltage when the metal tab cuts the field of the permanent magnet in the pickup. So are you saying that the magnetic field from the flywheel magnets are causing your scooter not to run correctly ? |
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Post by lostforawhile on Nov 17, 2017 15:34:23 GMT -5
2stroked The pick up has the magnet, the flywheel has the metal, we are not talking about the inner magnets for the stator. lostforawhile I would suggest disabling the kill switch wire from the CDI connection. Should be the black wire with the white stripe. everything is isolated down to the wire from the pickup and a ground, yes the pickup can induce it's own voltage, but lining up the tab with a pole magnet increases that voltage quite a bit, I suspect if i hooked a scope to the output of the pickup, I would see my timing pulse, but at a voltage too low for my meter, it's not uncommon in the automotive word to use a flying magnet to help trigger a sensor like this |
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Post by lostforawhile on Nov 17, 2017 15:37:28 GMT -5
you are exactly correct, everyone says the flywheel can't affect the pickup, but with magnetic fields that strong, it definitely affects it. I found a picture of a flywheel with a cracked magnet, and the inner metal cover removed from the magnets, and one of the poles are lined up with the raised part of the flywheel, any time you have powerful magnets attached to a metal ring like that, it creates a field where the magnets are. the pickup can generate a voltage by just interrupting it's field , with the flywheel tag, but the additional fields of the pole magnets increase that voltage, saying that the field magnets have no effect is ignoring the laws of magnetism, , you may not be able to stick anything to the flywheel tab, but there is a magnetic field sweeping past that pickup, it can't trigger the ignition by itself, but it can increase the induced voltage when the metal tab cuts the field of the permanent magnet in the pickup. So are you saying that the magnetic field from the flywheel magnets are causing your scooter not to run correctly ? if the pickup depends on that field to increase it's voltage, then a cracked magnet can definitely drop the induced voltage low enough to not be able to trigger the ignition. |
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Post by lostforawhile on Nov 17, 2017 15:40:46 GMT -5
I ordered a new flywheel from parts for scooters, then I can do an autopsy on the old one,I have 4 tested good pickup coils, and not one will generate a voltage from this flywheel, hooked straight from the pickup to the meter and a ground to the case. they will generate a voltage with a rotating metal piece not on the scooter
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Post by lostforawhile on Nov 17, 2017 15:42:21 GMT -5
but your lathe jaws dont have magnets.... nope, but I put the pickups at a much closer gap, they will generate some voltage on their own, but they are most likely using the pole magnets to increase that voltage, |
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Post by lostforawhile on Nov 17, 2017 15:47:34 GMT -5
it's common to use two magnetic forces together in a trigger, this gives you a much stronger and reliable signal,
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Post by lostforawhile on Nov 17, 2017 15:49:12 GMT -5
if I spin the engine over with a grounded spark plug, and touch a magnet to the pickup, the ignition fires
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Post by lostforawhile on Nov 17, 2017 16:48:37 GMT -5
the fly wheel will be here monday, I'm curious myself as to exactly whats wrong with it , so I'm going to find out, once it's running
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