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Discussion Starter · #1 ·
Want to clean my carb, but I'm kinda nervous. Been searching but can't find what I'm looking for... Does anyone have a diagram? Or a step by step that a newb can understand?
 

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PBP SENIOR M!LKER
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I dont know if there is a diagram for that China Copy carb.. There is a walbro rebuild kit that works for it.. Cam2 or EPR will have to let you know what one will work with it.. But it fairly easy.. Get yourself a can of carb cleaner.. Sit on a table over a clean paper towel and slowly disassemble putting all the pieces in order.. Spray everything and every hole and reassemble.. The diaphragms go bad, the needle goes bad and gaskets tear when old and crusty..

New carbs are like 12 bucks on E bay… You can get a HP copy carb for not much more..
 

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Git R Dun PBracer
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Discussion Starter · #4 ·
Ok so I finally took the thing apart, and everything looked surprisingly clean... Spraying down anyway while I have it apart, but what's my next step in figuring out why I don't have much power?
 

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Ok so I finally took the thing apart, and everything looked surprisingly clean... Spraying down anyway while I have it apart, but what's my next step in figuring out why I don't have much power?
Its a lil more to being clean with pumper carbs,,,you have to make sure the fuel flappers arent warped or have fold lines in the hinge point...The pumper diaphragm must not be wrinkled or warped.....The needle tip and seat must be clean aswell as clear..

If all checks out after that refer to video....

 

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Discussion Starter · #6 · (Edited)
Its a lil more to being clean with pumper carbs,,,you have to make sure the fuel flappers arent warped or have fold lines in the hinge point...The pumper diaphragm must not be wrinkled or warped.....The needle tip and seat must be clean aswell as clear..[\quote]


Not sure what any of those are. (First timer)
Well, except diaphragm. Everything looked amazingly clean tho?
 

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Git R Dun PBracer
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The black rubber gasket things that go inbetween the carb plates. If they are wavey really bad they are bad. If they look like the pic CAM2 posted.
 

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You have a China copy carb of a Walbro 15mm WYK pumper carb. It will take a Walbro WYK repair kit I got for $8 on eBay. The rubber diaphrams should be flat, the inlet needle seat and pointed needle have to be in good shape, as well as the arms & springs and all.
Might be better if you just got a $13 carb on eBay. If it don't work they will replace it.
 

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Discussion Starter · #12 ·
Ah gotcha. They should lay flat. I thought that's what you meant. Mine really weren't that bad then, they laid pretty flat, weren't torn or wrinkled really. Still gonna get a better carb when I have the funds(water pump just went out on my car =[ )
The needle and seat looked fine as well, both clean and clear
 

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Ah gotcha. They should lay flat. I thought that's what you meant. Mine really weren't that bad then, they laid pretty flat, weren't torn or wrinkled really. Still gonna get a better carb when I have the funds(water pump just went out on my car =[ )
The needle and seat looked fine as well, both clean and clear
Then put it back together and richen the Lowspeed needle 1/4 turn...set the highspeed needle to 1 1/2 and give it a try....make sure the purgeport holes line up......Good luck..
 

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Discussion Starter · #14 ·
The lowspeed is the one on top near the throttle cable right? and purgeports? Those little channels? I've already thrown everything back together earlier, went for a ride when I got off work with what little daylight I had. Ran pretty good this time, actually idled without having to keep the throttle halfway. Still wants to bog down a little if I open the choke all the way tho? Raced a neighborhood kid on his bmx bike haha... Being that close to the ground that fast is going to take some getting used to that's for sure. It kind of wobbles a little if I go fast, tire problem maybe?
 

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Yes the low is on top, inside that round brass piece. Need a small slot screw driver to get inside and turn the jet, the high jet is the spring loaded screw on the side. If you turn the low, you have to epoxy the threads. If you change the high it can change the low setting, so it's back & forth,lol.
 

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Make sure the choke plate in a pumper carb is not hanging up on the V-stack, air filter or box in some cases. A 12mm stock carb has an arm with a plate that covers the front carb hole, make sure it opens & closes all the way.
 
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