CK5
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New quad

It's the 50cc. I'll probably leave the oil mixer in unless it gives me reason to pull it. I was hunting for carb rebuild kits last night on Amazon and normally I don't have an issue finding them but it seems it's cheaper to just buy a new one for this machine than rebuild it. Even google pulled up more replacement carbs than rebuild kits.
 
I think this one is the one that fit mine. Not sure cuz I ordered a different one first that was wrong but I think this was the correct one. And I have a bunch of bikes and mix them up in my head lol.
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Also, if you didn't already know it, apple cider vinegar cleans that green ethanol garbage off carb parts real good.
 
Both exhaust mounts broken, poured yellow gas out of the carb, carb was missing a screw for the throttle cable, fuel shut off valve leaking, gas stunk like crap, chain tensioner snapped, but otherwise this new quad is in pretty decent shape. Plug looks good. Fixed a couple shoddy electrical splices. Ordering a new carb, filter, plug, chain tensioner, shut off valve, and oil fill plug. Going to degrease it this week and hopefully have it running by Sunday.
 
Both exhaust mounts broken, poured yellow gas out of the carb, carb was missing a screw for the throttle cable, fuel shut off valve leaking, gas stunk like crap, chain tensioner snapped, but otherwise this new quad is in pretty decent shape. Plug looks good. Fixed a couple shoddy electrical splices. Ordering a new carb, filter, plug, chain tensioner, shut off valve, and oil fill plug. Going to degrease it this week and hopefully have it running by Sunday.
Did you end up ordering a new carb or rebuilding old one?
 
Found two ghetto butt splices that weren’t allowing it to spark. New carb and a clean air filter and she’s up and running. Still needs a new throttle cable as this one is stretched to far but she’s up and running. Very responsive. Can’t wait to ride it.
 

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Took the Yamaha 125 out and it’s just a dog. Two new carbs, different jets, different needles, different needle heights. Only way it will run half ok is with no air filter and the idle screwed all the way in and the air fuel screwed out about 1/2 turn. Even then, once it gets real hot it just bogs and doesn’t want to rev but you can eventually get it to about 3/4 throttle. Beyond that it bogs and dies. Put an air filter on it and it goes so rich it won’t even run. Decided to throw a top end rebuild on it. There is some minor scoring on the piston but the cylinder looks good. Going to run a fine ball hone on the cylinder, lap the valves, and see what happens. 2463EB17-4187-436E-9D8B-5429778130B6.jpeg2C9A06CE-607B-4E01-B2E2-F0F4CCBC2C39.jpeg0F840EE2-CD85-4F49-908A-E1F352A773C7.jpegE037EF8E-05CE-4344-A8CA-C079BBC4A1A9.jpeg
 
Didn't have the right adapter and said screw it. Top end kit was only $70. I have no idea how many hours this thing has on it and a fresh hone and new rings couldn't hurt it.
 
I got a kit that fit my little 50cc Eton from Harbor Freight.
Hopefully that fixes it. The Breeze I just picked up does pretty good for bone stock but I've only got my 9 yr on it too.
 
Sound like the bike had low compression, bo ring seal and wasn't making any vacuum
 
Nasty. Going to lap them and start reassembly. Dad is bringing the ring file today so maybe by Sunday I’ll have it put back together.

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since you have the head off, cut out the extra part of the thread cert. That will get hot glow cherry red and cause pre ignition.


Dremel with small burr, then smooth with sanding drum.
 
maybe a small dab of jb weld on the next one.

Wow took another look at your pictures, that exhaust valve was not sealing at all. It might be bent
 

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