Okay so I’m new to the 4wheelers and karts and stuff so I’m gonna try and put this in words that make sense lol yesterday I bought a 125cc cheap Chinese 4wheeler (the ones with the little spider webs or lightning on the body) from my dad, he said he hasn’t had it started in awhile due to him needing to fix the carb and then just not using it afterwards, he rewired the ignition switch for the key because the factory key was sticking. He brings it to me and says it won’t start but he doesn’t exactly know why, I haven’t done much in way of testing it (don’t have many special tools just the basics so no voltage testers etc) he says that normally when you turn the key on it the light indicator for “Neutral” will light up and it does not. I took the battery out and tried to charge it on a battery charger/jump box and that did nothing. I really really do not want to re wire the whole quad so are there any tricks to solving this problem without any special tools? I need to figure out if the problem is in the battery or if he messed something up when he rewired the ignition. I can post pics of it later but I’m not near it right now, so far I’ve replaced the fuse in the power wires and I tried to hook them up to a different battery I have (could also be dead plus it’s bigger than the one it came with) and both of those led me no where. Any help would be much appreciated, sorry if I worded anything weirdly

 

Put the charger on the battery with the battery in place and connected to the bike's wiring. Don't have it on boost, just a normal charge, switch ignition on and the dash light should come on if the bike is in neutral (if it has gears). Put the parking brake on and press start button. If nothing happens (no dash light etc) start checking for power at the fuse, then on the same wire at the key switch, usually key switches have four wires, and two separate switches inside the ignition switch, one circuit sends pos from fused wire to everything, start button, light switch, horn etc, other circuit sends earth to the kill wire, naturally these need to be connected to the switch correctly, or you could be feeding pos to the neg kill wire on the CDI or earthing the circuits that should be positive.

 

I went ahead and ordered a multimeter I have a moped with some electrical issues too so I figured I’ll be using it a lot. My question is, since this 4wheeler had a key switch set up that had a kill engine key fob, do you think it would cause the ignition switch to not register properly? (The new one I mean since he cut the factory one and installed a new one) and I know I’ve heard that could cause some problems, if so I can wire up the old one or at least as best I can since I’ve never done it lol

 

Like merryman said, put the battery charger on it. It is easy to sit here and guess but honestly we don't have a clue until we have more information. Meaning, you get time to test it.

From the story you are telling about your dad adding a key switch. That should not be a problem. IF he wired it correctly. Depending on the switch he used, there might be more than 1 "on" position. Or something goofy like that. But with a questionable battery, You cannot even verify if the key switch is getting voltage. That is where the battery charger comes in. It doesn't care if the battery is good or not, it just supplies voltage.
Hopefully just adding the charger will make the lights come on and everything work.
If not, then testing voltage to or at, and Through the key switch is next.

 

Sounds good, the “battery charger” I’m using is a jump starter box but no worries I’ve ordered an actual battery charger, slowly getting my tools together, definitely will start running through and checking everything, thank you for the advice

 

Just one point, as it had a kill engine key fob, it must have a "black box" on the bike to kill it, if this was switched to kill, it may do just that and kill everything. I am totally unfamiliar with the workings of these, but it may be at the root of your problem.

 

I will look for one thank you for that, I was wondering about it myself but I didn’t know there was something I could look for, I was just going to wire the old key up

 

The kill switch fob is nothing to do with key or switch itself. When you think about it, in order to use it, to remotely kill the bike if the novice rider gets into trouble, you have to be holding the fob, so have to separate it from the key, before the child rides off.