Need help with QIYE 11 (Coolster 125cc)
#1
06-03-2012, 10:27 PM
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Need help with QIYE 11 (Coolster 125cc)
Can anyone tell me if the air/fuel on this carb be adjusted. I have ben reading on here for days. I have shimmed the needle and cleaned the jets. Changed the Plug, ect... It seems to run fine but just bogs if you hit the throttle fast. It does pop and backfire during deceleration if you let go of the throttle. No other mods have been made and its brand new less than hour on it.
Also what is this coming out of the back of the air filter?
Also what is this coming out of the back of the air filter?
#2
06-04-2012, 06:14 AM
now i'm asking because the pics really don't show me, but the plastic spacer that's squeezed in between the bolts at the intake and the carb, is it facing the right direction so as to make sure the O-Ring is facing the right way? most of the time, if a quad bogs, the main jet is still a little dirty. i realize you said you cleaned them. could your fuel filter be saturated with grit and breakthrough has occured? is the float keeping up with the demand for fuel? as far as carb adjustments, some have the adjustments on the side and others have them underneath the end on the intake side. but i really don't see one your carb
.
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#3
06-07-2012, 11:40 AM
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now i'm asking because the pics really don't show me, but the plastic spacer that's squeezed in between the bolts at the intake and the carb, is it facing the right direction so as to make sure the O-Ring is facing the right way? most of the time, if a quad bogs, the main jet is still a little dirty. i realize you said you cleaned them. could your fuel filter be saturated with grit and breakthrough has occured? is the float keeping up with the demand for fuel? as far as carb adjustments, some have the adjustments on the side and others have them underneath the end on the intake side. but i really don't see one your carb.
.Thanks for all your help Jaster, and sorry for the slow response but, rubber gasket is good, recleaned jets and replaced the fuel filter just for fun. I also added 2 more washers to the needle for a total of 4. It seems to rev good with no load but as soon as I put it in gear and thump the gas it still bogs but once it gets going it runs good.
#4
06-08-2012, 08:56 AM
the hose on the filter is just a crankcase vent thing
the fuel adjustment screw can be seen in the second picture.. unfortunately you have to drill out the brass plug that covers it, its right next to the filter
on mine I just took a little drill bit and started drilling and it eventually just spun out
the fuel adjustment screw can be seen in the second picture.. unfortunately you have to drill out the brass plug that covers it, its right next to the filter
on mine I just took a little drill bit and started drilling and it eventually just spun out
#5
06-08-2012, 09:00 AM
also, just an fyi, the bogging can be several things from undersized pilot jet to bad cam timing.. there have been several threads about it lately that discuss it and its remedies at length
good info here http://forums.atvconnection.com/chin...issue-new.html
good info here http://forums.atvconnection.com/chin...issue-new.html
#6
06-10-2012, 12:03 AM
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the hose on the filter is just a crankcase vent thing
the fuel adjustment screw can be seen in the second picture.. unfortunately you have to drill out the brass plug that covers it, its right next to the filter
on mine I just took a little drill bit and started drilling and it eventually just spun out
the fuel adjustment screw can be seen in the second picture.. unfortunately you have to drill out the brass plug that covers it, its right next to the filter
on mine I just took a little drill bit and started drilling and it eventually just spun out
#7
06-10-2012, 12:05 AM
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also, just an fyi, the bogging can be several things from undersized pilot jet to bad cam timing.. there have been several threads about it lately that discuss it and its remedies at length
good info here http://forums.atvconnection.com/chin...issue-new.html
good info here http://forums.atvconnection.com/chin...issue-new.html
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#8
06-10-2012, 10:46 AM
Check your plug if it is greyish you are running lean, most of the CHONDAS are set to run lean to pass emmisions.
Raising the needle will only help with low to mid power, at wide open throttle the needle is pretty much exposed either way.
The air fuel adjustment is also for low to mid throttle range.
You will probably need to rejet.
I usually remove the jets and using a welding torch tip cleaner open them up a little. I don't usually recomend this to someone that doesn't know what they are doing so be careful if you do. Go with the size that fits then use one size up. The pilot jet will be more dificult as there is more than 1 tiny hole in it. If you look through it there are several tiny holes in it. The tip cleaner will be too big for this and I use a small sewing needle just to open up the holes a tiny bit.
Don't be too agressive with it and do a little then test it out.
Also make sure all your fuel lines are good, the cheap lines on these things break down and send little pieces to the carb. I usually replace them with good quality line. Replace the fuel filter as well as the ones that come with it are junk. Get rid of the cheap china spark plug and replace with a good quality NGK plug. I also replace the spark plug wire and boot with the NGK racing setup.
Raising the needle will only help with low to mid power, at wide open throttle the needle is pretty much exposed either way.
The air fuel adjustment is also for low to mid throttle range.
You will probably need to rejet.
I usually remove the jets and using a welding torch tip cleaner open them up a little. I don't usually recomend this to someone that doesn't know what they are doing so be careful if you do. Go with the size that fits then use one size up. The pilot jet will be more dificult as there is more than 1 tiny hole in it. If you look through it there are several tiny holes in it. The tip cleaner will be too big for this and I use a small sewing needle just to open up the holes a tiny bit.
Don't be too agressive with it and do a little then test it out.
Also make sure all your fuel lines are good, the cheap lines on these things break down and send little pieces to the carb. I usually replace them with good quality line. Replace the fuel filter as well as the ones that come with it are junk. Get rid of the cheap china spark plug and replace with a good quality NGK plug. I also replace the spark plug wire and boot with the NGK racing setup.
#9
06-10-2012, 10:49 PM
Join Date: Apr 2012
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Check your plug if it is greyish you are running lean, most of the CHONDAS are set to run lean to pass emmisions.
Raising the needle will only help with low to mid power, at wide open throttle the needle is pretty much exposed either way.
The air fuel adjustment is also for low to mid throttle range.
You will probably need to rejet.
I usually remove the jets and using a welding torch tip cleaner open them up a little. I don't usually recomend this to someone that doesn't know what they are doing so be careful if you do. Go with the size that fits then use one size up. The pilot jet will be more dificult as there is more than 1 tiny hole in it. If you look through it there are several tiny holes in it. The tip cleaner will be too big for this and I use a small sewing needle just to open up the holes a tiny bit.
Don't be too agressive with it and do a little then test it out.
Also make sure all your fuel lines are good, the cheap lines on these things break down and send little pieces to the carb. I usually replace them with good quality line. Replace the fuel filter as well as the ones that come with it are junk. Get rid of the cheap china spark plug and replace with a good quality NGK plug. I also replace the spark plug wire and boot with the NGK racing setup.
Raising the needle will only help with low to mid power, at wide open throttle the needle is pretty much exposed either way.
The air fuel adjustment is also for low to mid throttle range.
You will probably need to rejet.
I usually remove the jets and using a welding torch tip cleaner open them up a little. I don't usually recomend this to someone that doesn't know what they are doing so be careful if you do. Go with the size that fits then use one size up. The pilot jet will be more dificult as there is more than 1 tiny hole in it. If you look through it there are several tiny holes in it. The tip cleaner will be too big for this and I use a small sewing needle just to open up the holes a tiny bit.
Don't be too agressive with it and do a little then test it out.
Also make sure all your fuel lines are good, the cheap lines on these things break down and send little pieces to the carb. I usually replace them with good quality line. Replace the fuel filter as well as the ones that come with it are junk. Get rid of the cheap china spark plug and replace with a good quality NGK plug. I also replace the spark plug wire and boot with the NGK racing setup.
How about shocks? Any suggestions on what brand and best place to get them?
#10
06-14-2012, 04:38 PM
you can defiantely drill out the plug to gain access to the fuel adjustment, it only takes a couple sceconds and it will probably spin out on the drill bit
