HOW TO carb adjustment on any Chinese atv. Kazuma, Yamoto, Redcat, Baja, Sunl, etc...
#271
03-03-2012, 11:04 AM
2manytoys-
Maybe you can help me, I recently purchased this unit, it did not run for about a year. I removed the car and soaked it in carb cleaner. I found that the small jet was blocked , got the blockage out and re-installed. Once I put the quad back together without tha plastics, I went to start it. The RPM's were extremely high and the exhaust system started to glow red. I shut it down and put it away for the night. The next day I went out to try to adjust the carb. While doing so, I noticed the exhaust glowing again and did not see any change in the idle RPM's. within about three minutes, I heard a thud sound and the quad shut down. I removed the spark plug today to see about checking thr compression and noticed the spark pplug had been damaged from inside the engine. Would happen to know what i need to do now to get this unit running? I would greatly appreciat your help. I have gone to several ATV dealers around town and they all kinda chuckle at the first mention of a chinese quad. But seriously, aren't they all chinese made?
Maybe you can help me, I recently purchased this unit, it did not run for about a year. I removed the car and soaked it in carb cleaner. I found that the small jet was blocked , got the blockage out and re-installed. Once I put the quad back together without tha plastics, I went to start it. The RPM's were extremely high and the exhaust system started to glow red. I shut it down and put it away for the night. The next day I went out to try to adjust the carb. While doing so, I noticed the exhaust glowing again and did not see any change in the idle RPM's. within about three minutes, I heard a thud sound and the quad shut down. I removed the spark plug today to see about checking thr compression and noticed the spark pplug had been damaged from inside the engine. Would happen to know what i need to do now to get this unit running? I would greatly appreciat your help. I have gone to several ATV dealers around town and they all kinda chuckle at the first mention of a chinese quad. But seriously, aren't they all chinese made?
#272
03-31-2012, 09:12 PM
#273
03-31-2012, 09:16 PM
#274
05-04-2012, 04:52 PM
jetting 200cc
i have a 200cc four stroke with mikuni carb, it is a konker
(suzuki dr200 se)
I have drilled holes in the air box and drilled a 1\2 inch hole in the bafel , i started with a 122.5 main jet and now have a 140.0 how do i know that i have the right jet ? I have allso moved the clip on the needle down 2 positions, the plug is still white at high speed but runs great and has good power please help
(suzuki dr200 se)
I have drilled holes in the air box and drilled a 1\2 inch hole in the bafel , i started with a 122.5 main jet and now have a 140.0 how do i know that i have the right jet ? I have allso moved the clip on the needle down 2 positions, the plug is still white at high speed but runs great and has good power please help
#275
06-07-2012, 07:06 PM
I have a chinese 50 with a lochin motor. I am getting spark and fuel but it wont start. I have tried to adjust the Air/Fuel screw and the idle screw.Now I am afraid I have the adjustments all messed up. Can you tell me what the adjustment screws should be at on both to at least get it started?
#277
08-24-2012, 09:15 PM
....I figured out how to fix it by draing the carberator bowl but I do not want to do that every time
... and also every time i floor it......it boggs down
and does not want to run but it idles just fine
#278
08-25-2012, 07:00 PM
110 icebear
Bought new yesterday, after messing with the idle, it pop, pop, pops, when starting, almost like it is backfifing, any suggestions?? Thanks
Alot of people have a hard time starting and running the Chinese atv's when new and also when cold. Most of these come with a gelpac in the carb floatbowl for shipping so it does not ruin the float. It is supposed to dissolve when fuel mixes with it. Many make the mistake of driving the atv once started. This is a mistake. You must let it idle for at least 30min for the gel to dissolve. If you do not do this you will risk the chance of clogging the jets and the initial adjustments will not work and it will not run right untill all the gel is gone. Most of the time these will start with the movement of the choke then you can lightly feather the throttle to keep it running. If you can reach the idle screw you can turn it up till you dont have to feather the throttle. After about 30 min you can make the final adjustments. CHANGE THE OIL BEFORE YOU RIDE!!! These come with a cheap shipping oil and must be changed or engine damage will occure. It is best to use an oil that is classified JASO MA certified made for 4 stroke or motorcycle engines which are made for wet clutch applications. These have no friction modifiers that are bad for clutches. You can even use diesel oil like Rotella-T 15w40. These oils can be found at your local WalMart or autoparts store. Synthetics are fine as long as it has the same classifications listed above.
The idle screw is the screw on the carb with a SPRING around it. The air/fuel screw is the flathead screw usually before the idle screw closest to the air filter. Some newer carbs have the a/f screw on the bottom of the float bowl. Here are some basic adjustments to get it started and to tune it once broke in.
The mixture screw had been set-up at the factory before shipment and should not have to be reset. Only a small adjustment may be needed due to climate and elevation. If necessary, refer to the adjustment as below:
1. Make sure the air cleaner is clean.
2. make sure the choke lever is OFF while running.
3. Warm the engine up for 3-5 minutes.
4. Turn the mixture screw clockwise until fully closed,
then turn the mixture screw 2 full turns out.
5. Adjust the idling screw until the engine idles EASILY.
6. Turn the mixture screw slightly clockwise and
counterclockwise until the highest engine REVs is obtained.
7. Adjust the idling screw again until the engine idles
EASILY.
8. Repeat step 6 & 7 till you get the best
performance...
*ENGINE IDLES EASILY means:
The engine idling screw must be set correctly to get a
slowest engine idle(1500 rpm - 1600 rpm), but does not
cut out if you press the accelerator quickly.
Cold weather starting will need an additional adjustment to help aid the starting process.
Most of the manual choke carbs have an adjustable needle inside the carb. Lowering the clip (raising the needle) you will be able to open the throttle and get more fuel into the intake quicker. This helps in the cold weather because the colder the weather the leaner the mixture is. You want richer in the colder weather.
1- Unscrew and pull the top of the carb off with the cable and there will be a slide with the needle in the center. (Notice the way the carb slide came out) In step #6 it must go back in the same way it came out.
2- Disconnect the cable through a small slot in the side of the slide.
3- Now you can take the needle out from the slide.
4- The needle will have a very small e clip in a slot on the needle. The needle will have 5 slots. Lowering the clip is richer the and raising the clip will lean it out.
5- Put the clip on the lowest setting for cold weather. DO NOT DROP THE CLIP! They are very small and hard to find.
6- Reverse the process with installing the needle back into the slide, installing the cable, slide the slide back into the carb and screw the cap tight. Remember in step #1 how the slide came out. It MUST go back in the same way.
7- Now make any adjustments as stated above in the carb tuning.
WARNING!!!WARNING!!WARNING!!!
Remember in step #1 and step #6 I said the slide must go back in the same way it came out? The slide will go in 2 ways. ONLY 1 way is the right way. If the slide is not put in the same way, upon start the quad will take off at full throttle. Make sure when you go to start the quad you have a hand on the kill tether or switch this way if it does take off you can dissable it. If this happens the slide was put back in 180 degrees out. This is very important for the safety of you and anyone standing in front of or around the quad.
These steps will work on 99% of these atv's. They are very hard to get running and people get upset when they turn the key and it does not run. Dont forget these are not set up at a dealer like the name brands so the most basic adjustments are done from the factory. These are built in china and the temps are hot so thats how the adjustments are done. As we all know in America the temps vary and these are not set at all for cold temps.
In some cases you will have tuned the quad and it runs very well but one day it will not idle or has poor performance. Most times it is because the carb has sucked in some debris from the tank. You will have to dissasemble the carb and clean out the pilot and main jet. Make sure you have a good inline fuel filter. This will help prevent this failure.
Hopefully this helps everyone with these concerns. These really do run good once tuned properly and with proper maintenance they will last a long time. And if you have any questions PM me and I will try to help as best as I can. Also once the temps start to get hot you may need to raise the clip for the warmer temps.
Good Luck!
2many
The idle screw is the screw on the carb with a SPRING around it. The air/fuel screw is the flathead screw usually before the idle screw closest to the air filter. Some newer carbs have the a/f screw on the bottom of the float bowl. Here are some basic adjustments to get it started and to tune it once broke in.
The mixture screw had been set-up at the factory before shipment and should not have to be reset. Only a small adjustment may be needed due to climate and elevation. If necessary, refer to the adjustment as below:
1. Make sure the air cleaner is clean.
2. make sure the choke lever is OFF while running.
3. Warm the engine up for 3-5 minutes.
4. Turn the mixture screw clockwise until fully closed,
then turn the mixture screw 2 full turns out.
5. Adjust the idling screw until the engine idles EASILY.
6. Turn the mixture screw slightly clockwise and
counterclockwise until the highest engine REVs is obtained.
7. Adjust the idling screw again until the engine idles
EASILY.
8. Repeat step 6 & 7 till you get the best
performance...
*ENGINE IDLES EASILY means:
The engine idling screw must be set correctly to get a
slowest engine idle(1500 rpm - 1600 rpm), but does not
cut out if you press the accelerator quickly.
Cold weather starting will need an additional adjustment to help aid the starting process.
Most of the manual choke carbs have an adjustable needle inside the carb. Lowering the clip (raising the needle) you will be able to open the throttle and get more fuel into the intake quicker. This helps in the cold weather because the colder the weather the leaner the mixture is. You want richer in the colder weather.
1- Unscrew and pull the top of the carb off with the cable and there will be a slide with the needle in the center. (Notice the way the carb slide came out) In step #6 it must go back in the same way it came out.
2- Disconnect the cable through a small slot in the side of the slide.
3- Now you can take the needle out from the slide.
4- The needle will have a very small e clip in a slot on the needle. The needle will have 5 slots. Lowering the clip is richer the and raising the clip will lean it out.
5- Put the clip on the lowest setting for cold weather. DO NOT DROP THE CLIP! They are very small and hard to find.
6- Reverse the process with installing the needle back into the slide, installing the cable, slide the slide back into the carb and screw the cap tight. Remember in step #1 how the slide came out. It MUST go back in the same way.
7- Now make any adjustments as stated above in the carb tuning.
WARNING!!!WARNING!!WARNING!!!
Remember in step #1 and step #6 I said the slide must go back in the same way it came out? The slide will go in 2 ways. ONLY 1 way is the right way. If the slide is not put in the same way, upon start the quad will take off at full throttle. Make sure when you go to start the quad you have a hand on the kill tether or switch this way if it does take off you can dissable it. If this happens the slide was put back in 180 degrees out. This is very important for the safety of you and anyone standing in front of or around the quad.
These steps will work on 99% of these atv's. They are very hard to get running and people get upset when they turn the key and it does not run. Dont forget these are not set up at a dealer like the name brands so the most basic adjustments are done from the factory. These are built in china and the temps are hot so thats how the adjustments are done. As we all know in America the temps vary and these are not set at all for cold temps.
In some cases you will have tuned the quad and it runs very well but one day it will not idle or has poor performance. Most times it is because the carb has sucked in some debris from the tank. You will have to dissasemble the carb and clean out the pilot and main jet. Make sure you have a good inline fuel filter. This will help prevent this failure.
Hopefully this helps everyone with these concerns. These really do run good once tuned properly and with proper maintenance they will last a long time. And if you have any questions PM me and I will try to help as best as I can. Also once the temps start to get hot you may need to raise the clip for the warmer temps.
Good Luck!
2many
#279
10-09-2012, 05:31 PM
I just put a new carb on my son's quad and now it screams its head off when you start it neither of the adjusting screws make any kind of differance i put the sleeve with the throttle cable in both ways and makes no differance. the needle is set to the second mark down from the top of the needle (needle sits further down in the jet). when you give it throttle it bogs down. any ideas im getting pretty frustrated here seriously thinking about doing what i need to do to get it running and trading it from something name brand have had nothing but problems with this thing and atleast with a name brand i can find someone to work on it. nobody around my area will even glance at it.
#280
10-26-2012, 02:24 PM
