Newbie to APC 43cc OR 49cc Mini Chopper - Pocket Bike Forum - Mini Bikes
 
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post #1 of 5 (permalink) Old 04-03-2020 Thread Starter
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Newbie to APC 43cc OR 49cc Mini Chopper

Hi. I haven't long purchased a mini chopper that I have found out is an APC (Pepboys) mini chopper....either 43cc or 49cc. It's the kind with the double wheel assembly on rear. I had to put a coil & recoil on it from the get go. Now I can pull start or electric start it but the person I bought it from had removed the bolts mounting the engine to the frame and I don't know what size or length I need to get?? It looks like at least one on right side needs to be quite long, then I can't tell about the front right bolt. The 2 on left side look like the may need to be aprx 25-30mm long? If anyone has a breakdown of the parts or knows the size of the engine/gearbox to frame bolts I would greatly appreciate it. It has great fire and will turn over with the starter that I may end up removing from what I read on other posts. It has an aftermarket ignition switch but looks like in off position it grounds the coil wire and in on position it gives power to the accessories and the start switch to where you have to press the brake before the circuit is completed. Closes the hot to start system opens the grounding when on, opens the hot and closes the ground system when off?? Am I correct on the way this works? Mine has the red, green, black, black/wht wires going to ignition switch. When I 1st got it he had the engine unbolted and switch unhooked. I'm unsure if this is something I will keep or resell but would like to get it to factory operations if I sell it. If I keep it I will put LED lights on it and probably just pull start it to crank. Any input, suggestions, and definitely any part breakdowns, schematics would be appreciated. Thank you.
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post #2 of 5 (permalink) Old 04-04-2020
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What you do is you get a piece of baling wire and stick it in the hole so it bottoms out then mark the wire with a sharpie and measure the length obviously the bolts going to have to be just a hair shorter than the length of the wire. They never made any manual or exploded views of anything they never really made a color coded wiring diagram either the Chinese just use spools of wire and when one ran out they would use a different color or whatever they had

remember be careful when you're working on it the double back wheel thing is extinct and you can't get parts for that at all

The transmission on those is also extinct

Faster then a speeding E Revo
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post #3 of 5 (permalink) Old 04-04-2020
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Re: Newbie to APC 43cc OR 49cc Mini Chopper

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Originally Posted by Dennis Griffith View Post
. It has an aftermarket ignition switch but looks like in off position it grounds the coil wire and in on position it gives power to the accessories and the start switch to where you have to press the brake before the circuit is completed. Closes the hot to start system opens the grounding when on, opens the hot and closes the ground system when off?? Am I correct on the way this works?

Yup. You got it. Magneto ignition is alive and willing to make a spark whenever the motor turns over. Has to be grounded to shut the motor off.
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post #4 of 5 (permalink) Old 04-04-2020
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Bolt diameter size.....I understand using the wire to find out length of bolt but do any of you know the diameter? I would guess m5....it seems to crank great on my bench, with rope or the starter. Will be so glad to have it mounted to frame!
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post #5 of 5 (permalink) Old 04-04-2020
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I just carry the entire engine into the Ace hardware so I can find the proper size bolt in the proper thread pitch I understand nothing is easy right now thanks to covid-19. I will try and figure it out for you when I got my shop to work on my transmission in my van I think I still have one of those engines laying around somewhere...

Faster then a speeding E Revo

Last edited by MrKitty; 04-04-2020 at 08:25 PM.
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