- This topic has 7 replies, 2 voices, and was last updated 3 weeks ago by โ ๏ธ M77.
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Sep 20, 2026 at 11:00 AM #23544
Hi to all,
I am new on this forum, I buyed a GW250 but the electrical system was completely burnt out in some areas; I managed to find a second-hand replacement, but after installing it, only the horn works. I need a wiring diagram to trace the wiring step by step.
Thanks in advance
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Sep 20, 2026 at 5:52 PM #23545
Usually based on the model year , you will find the diagrams in the service manual near the end of the pages ,ย search this site or manualsLIB site also.
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Sep 21, 2026 at 12:11 PM #23548
The year is 2005 and model s carby, I try to look for the service manuale but seems not available for my account type.
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Sep 21, 2026 at 9:12 PM #23550
Take pictures and post them here showing us what plugs you are looking at , and we shall decipher what connects to what
GV carby will be simpler to wire up but also checkย GT250 carby manual as it is “similar”ย (both vtwins, both same carbs, both use twin clocks at the front and a cable driven speedo drive)ย ,ย just the GV might have its wires different for the switch gears and rear lights etc.
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Sep 22, 2026 at 6:05 AM #23560

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Sep 22, 2026 at 11:14 AM #23562
Everything seems connected , what seems to be the issue ? although i see the last owner has put a custom white plug going to the rear lights.
You have a 3 plug CDI unit which is good,ย it is similar to the GT125, so look below
Needing a little help with my current project (+GT125 CDI PIN OUT)
GV250 = Some models have clutch switch but some early models do not use clutch switch , it was up to South Korea.
If you have a side-stand switch ===> Cut the side-stand switch at the side stand leg.ย Join the wires on the harness to bypass it, use electrical tape to hide this so naked wires are not exposed , then hide it far away from the road , so that water / dirt does not try to cause ingress.
Regards
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Sep 22, 2026 at 12:05 PM #23564
I Need Wiring diagram to fix my bugs.
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Sep 22, 2026 at 8:24 PM #23565
I Need Wiring diagram to fix my bugs.
Search manualsLib website , they have the most diagrams for the GV250 , also GV125 carb model is similar., good luck!
I’ll try to upload more manuals on the site when i get more time.
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