KymcoForum.com

Scooters - 125 to 300 => Grandvista 250 => Topic started by: Pablo.gyds03 on October 13, 2020, 12:55:42 AM

Title: Auto Bystarter help
Post by: Pablo.gyds03 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
Title: Re: Auto Bystarter help
Post by: CROSSBOLT on October 13, 2020, 10:54:37 AM
Begin by checking fuses?
Title: Re: Auto Bystarter help
Post by: eamartin 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.
Title: Re: Auto Bystarter help
Post by: Pablo.gyds03 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
Title: Re: Auto Bystarter help
Post by: eamartin 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?
Title: Re: Auto Bystarter help
Post by: Pablo.gyds03 on October 17, 2020, 12:21:48 AM
No I haven't don't that yet.
Title: Re: Auto Bystarter help
Post by: Pablo.gyds03 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.