Motorized Bicycle Carburetor pictures how to install and rebuild
- Thread starter Norman
- Start date
What is that screw next to the Tickle button? and What happens when you adjust it?
I think its the idle screw, but since I'm a noob, i might be wrong, I'm just trying to make sure.
I think its the idle screw, but since I'm a noob, i might be wrong, I'm just trying to make sure.
Re: Carb pictures how to
norman,
thank you so much for your cool lessons. you helped me adjust the notch to put my needle valve in and get the carb back together right and you also helped me to adjust my clutch. i appreciate your lessons and they are funny too.
dave welch
valparaiso, in
norman,
thank you so much for your cool lessons. you helped me adjust the notch to put my needle valve in and get the carb back together right and you also helped me to adjust my clutch. i appreciate your lessons and they are funny too.
dave welch
valparaiso, in
I saw your' article and thought it
very helpful, and, though I was able, thru a tear-apart, to figure out most of your' info for myself, I'm haveing another problem with it that I hope you can help with....I've installed a new carb and cable, and adjusted out both ends to the max, hoping to take up slack, but I'm getting no response at the throttle, there's no return action. I've looked thu the air intake and can see the needle in in the hole, but the twist grip dosn't spring back, and I can't see if the needle is moving...any suggestions?...don't really wanna take off the bottom of the carb to see if needle is playing..(gasket is such a pain!)..but the return spring dosn't seem to be returning the throttle!
From Norman
You must have the throttle slide in wrong where is a slot going down the side of the slide it indexes on a small nub in the hole the slide goes down. once you get the slide in correctly it should work.
seeing how this is an old post you've hopefully found that out by now.
very helpful, and, though I was able, thru a tear-apart, to figure out most of your' info for myself, I'm haveing another problem with it that I hope you can help with....I've installed a new carb and cable, and adjusted out both ends to the max, hoping to take up slack, but I'm getting no response at the throttle, there's no return action. I've looked thu the air intake and can see the needle in in the hole, but the twist grip dosn't spring back, and I can't see if the needle is moving...any suggestions?...don't really wanna take off the bottom of the carb to see if needle is playing..(gasket is such a pain!)..but the return spring dosn't seem to be returning the throttle!From Norman
You must have the throttle slide in wrong where is a slot going down the side of the slide it indexes on a small nub in the hole the slide goes down. once you get the slide in correctly it should work.
seeing how this is an old post you've hopefully found that out by now.
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Hi, Gary here. I'm new to motorized bikes; I have a 66/80 cc whatever motor. Upon accreloration, towards top end, my motor just dies out. No sputter, just loses all power till I slow down. Is there a cause?? A problem with the stock carbs?? Is there an easy fix?
I also have Boost bottles, and along with the expansion chamber, I am quite happy, although I am now using just one bottle. It, along with the expansion chamber make my bike quite a bit more responsive to throttle.
If you have any suggestions on my carb, I would appretiate a note.
Thanks,
Gary
I also have Boost bottles, and along with the expansion chamber, I am quite happy, although I am now using just one bottle. It, along with the expansion chamber make my bike quite a bit more responsive to throttle.
If you have any suggestions on my carb, I would appretiate a note.
Thanks,
Gary
I have no boost bottles but do run a expansion chamber, On One bike the carb pulls to top end and then some! on the other bike it runs to top end and falls on it's face then picks back up, falls on it's face again and so on, so on-But only on top end , other wise it runs decent but could run better. both are stock carbs, Identical outside appearing but totally different in how they run. not all carbs are the same! just as a update, I finished a carb replacement on above said bike. I kept my same slide and needle and jet and pick-up tube and swapped out other carb body, installed my own air filter and for what ever reason it does run better, so basicly I swapped out carb body only.
It started better too, before it was hard to start. so I've had my share of carb experience, it's just a matter of finding the right combination of parts to build carb. for example.. the tapering of the fuel needle, some are blunt and some sharp. I run the blunt needles in my bikes and it seems to make run better. when you do find the right combination in the carb , dont get rid of it!
It started better too, before it was hard to start. so I've had my share of carb experience, it's just a matter of finding the right combination of parts to build carb. for example.. the tapering of the fuel needle, some are blunt and some sharp. I run the blunt needles in my bikes and it seems to make run better. when you do find the right combination in the carb , dont get rid of it!
I burned my pantleg, and the seam pulled into the chain and broke the small drive gear just as I was crossing a 4 lane hwy. Screaching halt, and a 4 mile peddle home on a cold night.
very good info. I bought a cns carb and haven't got it dialed in yet. I hope someday you get a chance to tear one down and tweak it like the nt. I got my 66cc engine kit from bikeberry and didn't have too much trouble with it except for the carb, it wouldn't work right because the cheap design. I also added the chamber pipe from sick bike parts and it works nice, no more worry about weight on the cylinder plus much better performance. your articles are very informative, thank you very much.
Hi guys!
This carb. is being throwing the gas by the floats chamber vent hole. I set the needle in the first notch from the top and remove the air filter getting better results but still leaking the gas. This engine is new, run his first gas tank already, but with very bad MPGs.
Do you guys knows what's going on here?
http://www.youtube.com/watch?v=JE4QLU3BO7A
At the end is noticiable the oil in the floor, comes out of the exhaust.
This carb. is being throwing the gas by the floats chamber vent hole. I set the needle in the first notch from the top and remove the air filter getting better results but still leaking the gas. This engine is new, run his first gas tank already, but with very bad MPGs.
Do you guys knows what's going on here?
http://www.youtube.com/watch?v=JE4QLU3BO7A
At the end is noticiable the oil in the floor, comes out of the exhaust.
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Re: Carb pictures how to
The float looks like a problem here or the needle valve seat . Also make sure the float floats. If it is some how not sealed well it , the float itself could fill up with fuel and not float any more.
If you did not use a fuel filter you may have a small crumb of trash on the needle seat this will not let it seal ether.
The float looks like a problem here or the needle valve seat . Also make sure the float floats. If it is some how not sealed well it , the float itself could fill up with fuel and not float any more.
float how it looks when its upside down I'm sure there's a measurement in china but I don't know what it is I should have measured it in the pic. this photo the float isn't setting level but it should be my mistake when I took the photo. With the float setting level it should get you in the ball park.
If you did not use a fuel filter you may have a small crumb of trash on the needle seat this will not let it seal ether.
adjusting the float for the fuel level this is something to do only if you can't get it to stop flooding or over filling the bowl with fuel. If you ruin it you most likely will have to get a new carb. I haven't checked on parts at the cycle shops. I'm showing where to bend it I don't recommend bending the tangs as it would be hard to get them the same and they probably are not the same anyway but if you can try to get the tangs close to being the same then bend where I'm showing in the photo try to get the float level with the carb upside down. messing with fuel level in the float bowl will affect rich to lean to a degree how much on this thing I don't know. lower fuel level equals learner mixture and can starve engine and you might burn a hole through the piston. something to think about. Do a plug check when messing with the carb.
A quick and easy cave man check to see if the needle and seat are working. attach a short piece of fuel line to the carbs inlet fuel nipple hold the carb right side up using your lungs blow into the fuel line as your blowing into the fuel line turn the carb up side down you shouldn't be able to blow through it then. Hey don't do this with fuel in the carb fuel is not good for you and don't suck on it for cryin out loud!
Took me a while this morning to get great results adjusting the needle, cause it was going to lack of power in the 1st notch to 4 stroking in the 2nd notch. At one point, kind of frustrated with the results, I remove the gas tank cap and feel a improve in the power, then remove the air filter and it ran much better, finally set the needle in the 1st notch and TaDaaaa 
is running awsome.
I put back the air filter and still good enough for me. Thank you guys for your help and for this very helpfull thread.
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is running awsome.I put back the air filter and still good enough for me. Thank you guys for your help and for this very helpfull thread.
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Remove the air filter/ air box. (I needed to unbolt the rear shock to get to mine). Carefully install the carburetor starting with the throttle slide. Make sure to line up the slots on the slide with the jets in the carb, do not force this to go, if lined up properly it will slide in smooth.
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I finally pulled mine apart tonight for the first time, man it's ridiculous how simple everything is on these things. I love simplicity so much. Many times the best way to improve something isn't to add something to it, it's to remove the fat.
K.I.S.S Keep It Simple Stupid
K.I.S.S Keep It Simple Stupid
i live about 5000 feet up in the mountians of mexico and was wondering if i should re-jet my stock china girl. it runs alright and i am going to fidle with it tommorow. Also, i would imagine i need a little more air to get into the carb, is there any diy things i can do for this as it is very hard to get parts here
