Author Topic: Auto Bystarter help  (Read 2176 times)

Pablo.gyds03

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Auto Bystarter help
« on: October 13, 2020, 12:55:42 AM »
Looking for some guidance, My scooter starts right up but dies after a few seconds of idling, after a short warm up it idles smoothly.
I determined my Auto bystarter was not functional so i replaced it with an NCY replacement Bystarter, It's identical to the OEM one.
Installed the new bystarter and same issue, I turned the key on for about 5 minutes and no movement from the bystarter needle. I probed the 2 wires and I have no voltage on the 2 wires. Maybe it's related or not, my trunk light doesn't work, not sure if the switch in the trunk latch is bad or what, also my left mirror is missing (nothing connected to the plug)

does anyone have any tips?

Thanks in advance
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Paul

05 Kymco Grand Vista 250
93 Kawasaki KLR 650
16 KTM 1290 Super Duke R
12 SkyTeam 125 (Honda CT70/Dax Clone)

CROSSBOLT

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Re: Auto Bystarter help
« Reply #1 on: October 13, 2020, 10:54:37 AM »
Begin by checking fuses?
Karl

Three motorcycles 1960-1977 (restored a 1955 BSA)
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eamartin

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Re: Auto Bystarter help
« Reply #2 on: October 13, 2020, 11:22:57 AM »
The bystarter may be getting power from AC current.  I usually remove the bystarter and bench test it with DC.

Pablo.gyds03

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Re: Auto Bystarter help
« Reply #3 on: October 14, 2020, 12:41:17 AM »
I checked all of the fuses in the back box, all are good.
also checked the resistance on both old and new bystarters and they're in spec
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Paul

05 Kymco Grand Vista 250
93 Kawasaki KLR 650
16 KTM 1290 Super Duke R
12 SkyTeam 125 (Honda CT70/Dax Clone)

eamartin

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Re: Auto Bystarter help
« Reply #4 on: October 14, 2020, 10:38:37 PM »
Have you removed the bystarters and hooked them up to a good battery to see if the needles move?

Pablo.gyds03

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Re: Auto Bystarter help
« Reply #5 on: October 17, 2020, 12:21:48 AM »
No I haven't don't that yet.
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Paul

05 Kymco Grand Vista 250
93 Kawasaki KLR 650
16 KTM 1290 Super Duke R
12 SkyTeam 125 (Honda CT70/Dax Clone)

Pablo.gyds03

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Re: Auto Bystarter help
« Reply #6 on: November 15, 2020, 03:52:48 AM »
I looked at the Electrical diagram and saw there was a 7 Ohm 5W resistor, I also forgot to mention that when cold my scooter will Idle up for about 2 seconds then idle down and eventually stall unless I add throttle.

I'm thinking that this resistor went bad and its sending higher wattage to the Bystarter causing it to close the enricher circuit quickly instead of slowly.
when I get time i'm going to either put in a resistor in the Bystarter circuit or just disconnect the bystarter connections to see if it fast idles for longer than 2 seconds.
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Paul

05 Kymco Grand Vista 250
93 Kawasaki KLR 650
16 KTM 1290 Super Duke R
12 SkyTeam 125 (Honda CT70/Dax Clone)

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