Today I would like to focus on the Edelbrock Performer 1406 with electric choke. is it a carb issue or something like the cdi? ive had the carb apart a couple times cleaning it but it doesnt seem to help. I just bought a 04 R and it runs well with the choke on ( I did not know that off was down. When you turn choke off it makes the engine run lean whick means it has more air. good morning fellas. 2 days ago · remove the two bolts holding the gas tank to the engine. Once the temperature gauge was showing a reasonable temperature, I pulled over so that I did not kill the bike by taking off the choke if there was something wrong. Riding an all-terrain vehicle, or ATV, can be a fun and exciting way to explore the great outdoors. Automatic chokes are of two types: integral, and divorced (also called remote). Re: Yamaha Bruin ATV Running problem You have to remember the reason your machine runs better with the rag in the venture is because you are sucking in air before the main jet and all your doing is just restricting the amount of air (making it run richer) you should be able to duplicate this by engaging the choke on full. When I start the ATV it runs fine at idle, but when i try to ride it with the choke off it cuts out and acts like it wants to die. Engine will only run on only full choke - Answered by a verified Technician We use cookies to give you the best possible experience on our website. Huge ATV Recall by Polaris – Sportsman and Scrambler February 15, 2008 By E. If a little more manual choke cures it, then it just needs choke for startup, which is normal. Performance race Big Bore kit for the 152QMI and 157QMJ gy6 125 and 150cc four stroke chinese scooter/atv engines. Sizemore 158 Comments Polaris is recalling 95,000 ATVs due to defective electronic control modules (ECMs) that may overheat, causing a fire and burn hazard to riders. In fact, just about every Japanese bike from the '60s and '70s came with this mixer. Jul 12, 2009 · picked up a bear tracker cheap, with some issues. I drained all the gas and added Stabil for ethanol to the new gas, but I'm still having the same problem. There is no gas leaking from the carb, no backfiring. Cranks great, choke the engine and crank until it hits, then push choke nearly off and hit the starter again and it is running. Mostly kids use this type of ATV. I Have A 1991 Yamaha Moto 4 Yfm80 4 Stroke. the air screw was factory set. The choke appears closed but is not. That almost always means the bike runs hot, choked off, and not running optimally. Whether it be cold or warm, we've got you covered. Set the parking brake on the ATV and start the engine. Polaris ATV - Idles but dies with throttle tried running it with the tank cover off to see if my vent was clogged. In an internal combustion engine, the throttle is a means of controlling an engine's power by regulating the amount of fuel or air entering the engine. i start it and let it run for about a min. this is assuming the bike is warmed up to operating temperature before you take the choke off. But then if you put full choke on again it would idle fine (fast idle on full choke). As a result, the engine will perform better and will reduce wear on other critical parts. My present camper generator runs of propane which has worked so so much better than my camper that had a gasoline generator. You can easily cold start a snow blower by using the choke and the primer in the right way. I have an 8n that was running a little rough and needed to have the choke out to run smooth. 763-398-2690. and my bike runs fine when the choke is down so i dont see how something can be stuck and im definatly running rich i can tell u that i see lil drops coming out the exaust sometimes so its definatly rich. i start it and let it run for about a min. Finally make sure you have the choke lever down completely after the ATV is started and warmed up. I didn't notice any problems, and nothing appeared to be clogged. I do not have a similar mower, however many 4 cycle carbs have a very small passageway for air flow during idle. 1) Choke not set tight enough. You will not be disappointed with the high amp Yuasa batteries. my 2007 brute force 650 runs a lot better with choke on. The carburetor on your Polaris ATV is used to bring fuel into the engine. But, ATVs are powerful machines, and you need to know how to safely and properly ride one before you start. CFMOTO is a ATV and Side x Side Manufacturer. idles perfect. a much better and. Carb is clean, plug have been changed and had a friend give it a good once over, can't find the issue. It doesn't tighten. Have got a battery pack charger inside your automobile all the time. We only ask that you credit The Carburetor Shop LLC when you copy the article. If the wires are connected and the taillight is working, the choke mechanism may need to be replaced. I've tuned a hundred Carter AFB / Edelbrock 1405 manual choke carbs and they are a breeze. will idle all day but if i try to close the choke or accelerate the engine it dies. The guy I bought it from said a few people came to look at it and the last guy rode it for 5 min and came back running rough. If I ride it with the choke open just a little it runs fine. a much better and. If you are having some trouble with your ATV or Side-by-Side, the ATV AnswerMan is here to help. That almost always means the bike runs hot, choked off, and not running optimally. of adjusting the choke. Scooter runs but is very slow. we tried it and had a couple hair raising experiences so i parked the bike until my son was a lil more mature. I've played with the auto choke a bit more, and there is a happy place where it runs ok, but I can't figure out a way to set it at that position and can't find any mixture screws on the. Tried taking it down the road and she popped a lot. However, I cannot get it to run without the choke 95 percent closed. The gear reduction will allow the wheels to spin faster, while the clutch kit will allow the engine to rev higher before engaging, which will give you the power when you need it the most. Why Does my Small Engine Run Better with the Choke on? Unfortunately, we hear this question asked more often than ever before. No, I'm not trying to insult anyone, this is a common problem. At $200 a starter, this is not a cheap fix. 2) The setting varies depending upon the exact application. Showing 1-26 of 26 messages. ATVs that can serve as both capable utility rigs and solid trail performers are currently one of the hottest segments in the industry. I just bought a 04 R and it runs well with the choke on ( I did not know that off was down. the plug was carboned up so i replaced it with no change. If this spring breaks, the choke plate will not firmly close, if at all. I have taken the muffler off & it was well choked up with coke but after cleaning it's still doing it. i have an electronic choke so i cant run it on half choke. Often times we overlook the obvious. I have a yamaha dt125r and it will only run with choke on even when engine is warm if i turn choke off the engine - Answered by a verified Motorcycle Mechanic. Engine will only run on only full choke - Answered by a verified Technician We use cookies to give you the best possible experience on our website. the problem i'm having is that the engine is not wanting to keep running while cold. The 22mm Carburetor w/Hand Choke Lever for 125cc ATV wasn't the exact same as the one I took off the ATV, but I was able to make it work - and the ATV runs better. I Have A 1991 Yamaha Moto 4 Yfm80 4 Stroke. I have changed the fuel filter and the lines seem fine. if you don't have a big bore ATV i would run 87 octane and. Finally make sure you have the choke lever down completely after the ATV is started and warmed up. My 06' will only idle/run with the choke on full or 1/2. If it still does not straighten out, I would be searching for a vacuum leak such as carb baseplate or vacuum line off or. welcome to CRF's Only! the choke creates a richer air/fuel mixture by reducing the air into the carb. I have cleaned out the carb jets twice, primary and main, all clear. I see where many Harley people use these also. Idled with choke for about a min and then turned off choke and set idle speed up just a. Runs on choke - The vehicle may run on choke when it's warm but stalls if the choke is turned off. It took my son to read the manual and set me straight. Also, still dosn't want to run when I give it gas (throttle pressing in). Or popping and spitting occurs through the pipe on deceleration with a closed throttle. If it still does not straighten out, I would be searching for a vacuum leak such as carb baseplate or vacuum line off or. Does anyone have any ideas? Could this be an electrical isssue? In the past, I did have a few wires chewed on by mice. This is a popular carb for the small block Ford and is the trickiest Performer carb to tune. idles perfect. Advertising an automible dwi charge gives you a capacity to better settle when getting the perfect price. the motor just dies when choke is released. Better still, you can choose to receive email messages on all Honda products or just those you're most interested in. Polaris ATV - Idles but dies with throttle tried running it with the tank cover off to see if my vent was clogged. - The engine runs hot, knocks, pings and overheats. If you hunt with shotguns try these tips on how to pick the right choke for your style of shotgun shooting. I have to roll on the throttle with the choke off to start, then choke about 3/4 to get it to warm up all the way, if I try anything else it sputters out and won;t stay running. It also effectively cleans all nonpainted metal parts and surfaces. 32 PSI cold is recommended. The power increase is courtesy of an. All the parts and info you will need can be found on this page. I ran it for a while this morning, and it did better than I expected. Huge ATV Recall by Polaris - Sportsman and Scrambler February 15, 2008 By E. Has 2000 miles on it. < being im clueless maybe someone could answer this for me There will be a cable that has one end that attaches to the choke, and the other end with a knob that goes into the car to be mounted on or under the dash. Also, still dosn't want to run when I give it gas (throttle pressing in). My 06' will only idle/run with the choke on full or 1/2. is it a carb issue or something like the cdi? ive had the carb apart a couple times cleaning it but it doesnt seem to help. But I have to hold the choke where its about half way to keep running. Yes, gas may run longer and I will run this new generator on gasoline first, but propane runs so much cleaner and is easier to transport and store. The head pipe glows very bright red and the muffler sometimes will shoot out a blue flame. If the choke coil travel equals or exceeds the carburetor travel, the choke unit does NOT need replacing. Artic cat only runs with choke on Walden's World WHY your motorcycle only runs on CHOKE - Duration: 12:21. Showing 1-26 of 26 messages. No, I'm not trying to insult anyone, this is a common problem. - The engine runs better in warm weather, worse in cool. the slide doesnt open as well as i would like almost like there is a vacuum leak somewhere. 2) The setting varies depending upon the exact application. do you know how to test. My son has a 90 e-ton it worked great when he first got it. How to Start Riding an ATV. Free Shipping over $100. Some games incorporate little parts on what kids can choke, so be mindful of cautions around the package deal. This thing is driving me crazy! Now I'm not an atv "mechanic" to speak of, but I do know what I'm doing. A choke restricts the amount of air going into the engine creating a fuel rich mixture for starting an engine that is cold, if the fuel jets in the carb have become blocked resulting in a lean fuel mixture it will run rough and sometimes not at all without the choke on. Dec 11, 2010 · Right now I'm having problems with ethanol I think, mostly I think from non use and gas getting old. Once the temperature gauge was showing a reasonable temperature, I pulled over so that I did not kill the bike by taking off the choke if there was something wrong. i have the adjustment screw turne. Buying toys and games is not only for youngsters, the truth is many grownups love to have lots of playthings on their own. Only on the coldest days was the choke needed. Join the fun!. This happens due to left-over fuel and oil from the last time the engine run, making it run a bit rich in the beginning. Eliminate the Auto Choke, how to. One carb may fit several applications. Some choke levers are actuated by a thumb tab on the left side handle by pushing it to pull a cable. Features rolled tempered-steel wire housing made to exact inner and outer specifications to insure correct clearances for the inner wire. Rated 3 out of 5 by Zach77 from Good Youth ATV for Kids With Riding Experience Good overall youth ATV but needs improving for the current retail price. Shop for Fuel and Air Intake Systems, like Lectron Adjustable Power Jet Carburetor Kit at Rocky Mountain ATV/MC. and my bike runs fine when the choke is down so i dont see how something can be stuck and im definatly running rich i can tell u that i see lil drops coming out the exaust sometimes so its definatly rich. We only ask that you credit The Carburetor Shop LLC when you copy the article. Set the parking brake on the ATV and start the engine. Cranks great, choke the engine and crank until it hits, then push choke nearly off and hit the starter again and it is running. Any help much appreciated. 45 thoughts on " How it works: 150cc GY6 Automatic Choke " of guys riding with no filter because it "runs better. Some ATV’s have a choke lever located on the carburetor and is on when the lever is up. Rated 3 out of 5 by Zach77 from Good Youth ATV for Kids With Riding Experience Good overall youth ATV but needs improving for the current retail price. This is a popular carb for the small block Ford and is the trickiest Performer carb to tune. I've tuned a hundred Carter AFB / Edelbrock 1405 manual choke carbs and they are a breeze. Knowing how to deal with a dead battery can help get you going again, usually fairly quickly. Join the fun!. now is seems as though it is getting way too much air, or not enough fuel. Why does my ATV engine pop when I give it throttle? a few chunks of stuff were in it but I've seen worse that runs better. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. the air screw was factory set. The auto-choke is ON in it's natural state. It Is Winding Over And I Have To Fool With The Choke For A While. This is a quality Taiwanese Denso DS 59mm big bore kit. The Tracker 90 is full of spirit and ready to play. Any ATV'ers Out there? POLARIS QUESTION!!! I Have a 2008 Polaris Sportsman 400 H. While ATV troubleshooting there are a few common issues that should be your first line of investigation. choke is working. Winter is taking over but your ATV Editors are, like always, digging through SprocketList in the hopes of finding a sweet deal on a machine to make these snowy rides a reality. Gumout ® Carb/Choke & Parts Cleaner quickly removes these deposits from the inside and outside of the carburetor to improve engine performance and fuel economy. the motor just dies when choke is released. I also just tried to run it with my figers blocking half the about 3/4 of the intake and still would not run with the choke off. At $200 a starter, this is not a cheap fix. Choke on and it would rev with the throttle. Not even a hesitation. Join the fun!. Mostly kids use this type of ATV. poor running quality does not mean a defect in the carburetor. If the engine will not start when the engine is hot, the choke may be stuck in the closed position, typically due to a lack of lubrication. checked the air filter was dirty cleaned it. Some times a back fire into the carburetor will blow a pressed-in BB out of a drilled passage way. If the choke coil travel equals or exceeds the carburetor travel, the choke unit does NOT need replacing. After repairing the chewed wiring and replacing one of the armatures, it started right up. If I rev it up with choke, I can keep it running with choke on if I keep the throttle into it only for awhile, then it drops off and can backfire. If I leave the choke on and let the bike get warm it runs for a bit and then slowly dies. DR ATV Klien Replacement Carb for 1980 CT70. For one thing, starting was a breeze. Why Does my Small Engine Run Better with the Choke on? Unfortunately, we hear this question asked more often than ever before. Dec 23, 2008 · Tecumseh 5 hp model hssk50 67317m snow king. Also, some personal loans up to 70000 other trainer might be able to clarify the material much better. Distribution. Cable Choke Adapter These Carb Kits come with a manual lever choke. LT50's only run with choke on, carb cleaned take the first jet out is there anyone out there who can give me any more ideas so i can make it run better? (without. I ran it for a while this morning, and it did better than I expected. The bike runs richer, so uses more fuel and will eventually foul it's plugs. Finally got it started with starter fluid and it'd only idle with the choke on, choke off it'll run, but pops, doesn't run well and won't idle. but when the engine. Free Shipping over $100. In case you are a person trying to find games yourself, or that unique fresh payday loans arlington tx one particular in your life, then this following article was composed to suit your needs. I have cleaned out the carb jets twice, primary and main, all clear. It's a common thing for dirty/gummed up carburetors to only allow an engine to run with the choke on, but my engine runs fine when the choke is off and dies out if I turn the choke on. tried another carb & still the same. It runs better without the air filter, and also if I turn the screw out the exhaust starts to smoke heavily. We provide people with quality powersport vehicles such as our CFORCE ATVs & ZFORCE Side x Sides. Eliminate the Auto Choke, how to. Once the temperature gauge was showing a reasonable temperature, I pulled over so that I did not kill the bike by taking off the choke if there was something wrong. Before marketing and cash advance and payroll loan advertising the application, you should established your own price tag according to the market price of the car. It took my son to read the manual and set me straight. I have taken the muffler off & it was well choked up with coke but after cleaning it's still doing it. While it runs, spray some WD40 into the air inlet to lube up all of the insides of the motor and displace any water. I'll double check the spark plug gap as suggested. I ran it for a while this morning, and it did better than I expected. The official online store of Gander Outdoors. I have dumped all the gas filled back up, gas is on. and my bike runs fine when the choke is down so i dont see how something can be stuck and im definatly running rich i can tell u that i see lil drops coming out the exaust sometimes so its definatly rich. All things considered, the round-slide Mikuni is an excellent carb, with a wide range of tuning capabilities. Scooter runs but is very slow. PZ19mm Cable Choke Carby Carburetor tuning. (Same thing in 5. STARTING A GAS SNOW BLOWER: How to Start a Gas Snow Blower. When warm on the other hand, a properly jetted two-stroke engine should not smoke much. Why Does my Small Engine Run Better with the Choke on? Unfortunately, we hear this question asked more often than ever before. My ATV has never run so well. Thinking an easy cleanup and basic maintanace, I volunteered to get it running for her. Oct 08, 2019 · From neglecting minor maintenance issues to learning the hard way that your quad isn't a great swimmer or immune to the laws of gravity, here are 10 quick and easy ways to ruin your quad. If this spring breaks, the choke plate will not firmly close, if at all. i have the adjustment screw turne. now is seems as though it is getting way too much air, or not enough fuel. This article, as with all other articles found on this website, have been written to place in the public domain and copied if desired. I have to adjust the idle screw to keep it running and even then the idle jumps +/- 400 rpm. Overtime, carburetors and choke valves can become clogged with gum, varnish and dirt, affecting performance. Lot's Of Spark. The bike runs richer, so uses more fuel and will eventually foul it's plugs. Nov 24, 2009 · Plowing Tips - First Time ATV Plower. Huge ATV Recall by Polaris – Sportsman and Scrambler February 15, 2008 By E. When I take off the choke bike dies. The previous owner said that it stopped running so he bought a new Carb and CDI box and it still didnt run. will idle all day but if i try to close the choke or accelerate the engine it dies. Jet pins and an air adjustment valve are attached to the carburetor. 45 thoughts on " How it works: 150cc GY6 Automatic Choke " of guys riding with no filter because it "runs better. The divorced choke resides on the manifold (divorced or remote from the carburetor) and has an operating rod from the choke to the carburetor. It's starts perfect and runs great with the choke on, but then when I don't choke it, it runs rough. SOURCE: idles ok with choke out but wont run any higher. The engine would not stay running with the choke wide open and then it still stalled. OLD MIKUNI CARB TIPS. the bike has always been hard to start unless you cranked it every day. Knowing how to deal with a dead battery can help get you going again, usually fairly quickly. 1) Set choke a little tighter and retry. It also lacks power and after running for a while will stall. I'll double check the spark plug gap as suggested. I also just tried to run it with my figers blocking half the about 3/4 of the intake and still would not run with the choke off. choke is working. I dont know if raptors are similiar. It does this by allowing you to manually open the choke further than the factory electric choke, for a quicker start. If I leave the choke on and let the bike get warm it runs for a bit and then slowly dies. i have the adjustment screw turne. Buying toys and games is not only for youngsters, the truth is many grownups love to have lots of playthings on their own. 9 only runs with choke on when you pull the choke on, what you are in fact doing is decreasing the amount of air, and therefore increasing the amount of fuel so, as mentioned, you have a dirty/blocked carby, or quite a bad air leak in the manifld/gasket more than likely carby rebuild though, pretty simple thing if you are fairly handy and take your time. How to Check Your Choke. will start back with the choke again with no problem. it will not idle or run with out the choke, b4 it would run good and idle good without the choke after it was warmed up. The run switch (or sometimes referred to as the “kill” switch) has to be in the "on" position. It runs better without the air filter, and also if I turn the screw out the exhaust starts to smoke heavily. If you've got it running, and you don't want to pull apart the carbs, dump a whole can of seafoam in the tank. Well, I finally brought the 1942 Farmall A back to life. Check both wheels to see if they rotate freely. Keeping your favorite motocross or powersports vehicle running smoothly is a concern for every Vey’s Powersports customer. I have an idea that it's running lean. If you hunt with shotguns try these tips on how to pick the right choke for your style of shotgun shooting. The Tracker 90 is full of spirit and ready to play. Runs great with the choke closed. Scooter runs but is very slow. calibrations may vary due to regional fuels and state of engine tune and performance. If this is not adjusted correctly, your ATV may not run, or run very poorly. So I've been a fan of the Carter AFB Edelbrock carb on my street cars for many years. If this spring breaks, the choke plate will not firmly close, if at all. The color of your spark plug is a valuable piece of information about how well you ATV is really running. Jul 07, 2015 · The most important thing when operating an ATV is: a) The ATV is in good running conditiona) The ATV is in good running condition b) How fast will the ATV runb) How fast will the ATV run c) Safetyc) Safety d) Make sure that the person riding with you is holding on tight. PZ19mm Cable Choke Carby Carburetor tuning. Only premium gas and I pull and pull and pull and it will kinda Pop off and won’t want to go. It runs pretty good on choke but spits and sputters and pops in the exhaust off choke and it won't idle. Keeping your favorite motocross or powersports vehicle running smoothly is a concern for every Vey’s Powersports customer. Pull the plunger up and there is an extra passageway to let more petrol into the engine. - The engine runs better in warm weather, worse in cool. This is a popular carb for the small block Ford and is the trickiest Performer carb to tune. Oct 08, 2019 · From neglecting minor maintenance issues to learning the hard way that your quad isn't a great swimmer or immune to the laws of gravity, here are 10 quick and easy ways to ruin your quad. Sizemore 158 Comments Polaris is recalling 95,000 ATVs due to defective electronic control modules (ECMs) that may overheat, causing a fire and burn hazard to riders. But if an engine idles well, but runs only at higher RPM (up to 3,200 RPM with a fixed/non-adjustable main jet; or 3,600 RPM with an adjustable main jet) with the choke partially closed, or if it surges or hesitates to rev up upon acceleration, this means the engine is running too lean on fuel, and following are the most likely causes: (listed. Thinking an easy cleanup and basic maintanace, I volunteered to get it running for her. Tried taking it down the road and she popped a lot. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. It had been put up for a while ( a few months), it wouldn't start when i went to get it out. If the wires are connected and the taillight is working, the choke mechanism may need to be replaced. A choke plate closes-off the air going into the carb which makes the fuel mixture really rich so it can run. I could not find a 2002 Ranger - Polaris website lists 1999, Series 10, Series 11 the 2008 and up At any rate, when they won't run unless the choke is on it usually indicates the carb needs cleaned - sometimes it's just because there is a low fuel level in the float bowl. idles perfect. The bottom chain guard constantly gets caught on stumps or the slightest pile of dirt causing the ATV to high center and stop it in its tracks. I have one and it goes at least 50 maybe 55 with a brand new spark plug in its a great atv -great suspension -great handling -rolls nice and deosnt break if u do -drifts very well -tall feeling. Regular oil changes and running non oxy or premium fuel are the things a guy wants to make sure were done when buying used. If it really won't run without the choke being closed/on then it's not getting enough fuel and the carbs probably need cleaning. I dont know if raptors are similiar. This is called a Venturi. This style of 4-stroke dirt bike carb and ATV carb is also used on super pocket bikes, go-karts, and street scooters. hmm the choke on is all the way down right and off is up? just making sure. You need to get the carb cleaned. 400ex 450r carb install tune exhaust backfire page 1 of 2 - spitting back through the carb - posted in. It fits Chinese 50cc 70cc 90cc 110cc 125cc ATV Quad Pit Dirt Bike. Re-jetting the slow jet richer and a few stabs of the throttle will compensate for removal of the choke. The choke on the GX150 carburettor is actually an enrichening circuit and in reality does not choke off any airflow at all. If this spring breaks, the choke plate will not firmly close, if at all. it was in storage but had this prob right before i put it in storage any ideas/solutions would be kick @$$ thanks. Choke I have a similar issue with my 05 Shadow, she will start and stay running with choke out, but as soon as I push choke back in she will die. Once you close the choke, reinstall the air filter and housing onto the carburetor. I have a small list of things that it needs. It gets a little better with choke out but not much. The many goods that they can offer you can include tires, clutches and clutch pads, filters, brake shoes and brake pads, ATV throttle choke and many other such items. Tons of nice blue smoke with choke and cold-no-choke. why is this? posted by 87gtnos on wednesday, august 17, 2005 10:35 pm hey guys, seems ever since i got the sled out 3 weeks ago it has been doing a low rpm and low throttle popping backfire through the carbs. still way better than a shovel on walk behing blower. Jan 19, 2011 · ATV won’t stay running. Tried taking it down the road and she popped a lot. 45 thoughts on " How it works: 150cc GY6 Automatic Choke " of guys riding with no filter because it "runs better. It sat in my shed until this summer when I pulled it out put it together and put all fluids in and tried to start it. There is one small issue that I don't know how to figure out It will only run on full choke. There's a distinct difference between a Yamaha YFM350 Wolverine repair manual and a Yamaha YFM350 Wolverine service manual. the slide doesnt open as well as i would like almost like there is a vacuum leak somewhere. will start back with the choke again with no problem. Thinking an easy cleanup and basic maintanace, I volunteered to get it running for her. We understand what it means to really take care of a vehicle, so we have gone the extra mile to provide much more than Kawasaki jet ski repair; we offer top quality motorcycle, ATV, and UTV parts in San Diego. Rated 3 out of 5 by Zach77 from Good Youth ATV for Kids With Riding Experience Good overall youth ATV but needs improving for the current retail price. Backfires - Popping on deceleration for a lean idle circuit or backfires in general. You will not know if the BB is missing cause it will look like another hole in the carburetor. The run switch (or sometimes referred to as the “kill” switch) has to be in the "on" position. whether you're looking for a gas or electric four-wheeler, we've got a full line of atvs for kids and teens in fun sport and utility models. OK sorry guys yes back to the original problem, I pulled the carb off and yes choke is on when up and it only runs in the up position. If your China ATV won't start, whether it's straight out of the crate, or seen its better day; there may be a quick fix. It runs better without the air filter, and also if I turn the screw out the exhaust starts to smoke heavily. If it really won't run without the choke being closed/on then it's not getting enough fuel and the carbs probably need cleaning.