Backfire solved! I switched carb slides, all that was needed! This was recommended by other commentor. Yes after cleaning carb I just put it back together thinking they were the same-wrong. The mechanical wear conforms a proper fit & function. I followed up w/ a sync of throttles. It's back to running well!
Mine did the same thing. This is what I did. 1. Rebuild carb and clean it 2. Replace spark plugs 3. Make sure valves are at the right distance 0.005 inch intake 0.009 inch exhaust 4. Make sure air filter and everything is put together to make sure you can adjust the carbs correctly. My air fuel screw is 2 turns out. 5. If this doesn’t work change the gas and make sure it’s getting a good supply of gas from the tank.
I'll tell you what the problem is same problem I got these Kawasakis are fucking junk I have a 650 prairie that's a piece of shit as a motor I'm in the process finding a replacement
Nah dude you just suck at working on them. My 700 screams all day long and runs great. You just need more practice. Don’t give up on it. They’re great engines. Get a repair manual instead of just guessing
my 2005 750 is doing the same thing now. Ive been researching here on youtube for days now, but its all the same questions and solutions. I was gonna just take it to a shop, but I hate to be without my bike for 2 to 3 weeks...this sucks tho !!!
Everyone always post vids thinking people can help. These bikes have a lot of parts that can go wrong. It's just a process of elimination. Check fuel delivery to carbs, check carbs, valves, timing i.e. stretched timing chains or bad crankshaft positioning sensor. It could also just boil down to having a bad battery. There is so much that can go wrong. You need to be mechanically inclined to own one of these bikes. Too many people say brutes are junk, but they just suck at working on the four wheeler. These bikes run like a scalded dog whenever they are dialed in.
@soymarcepro4095 well when I adjusted intake and exhaust value it still did it but when I gave up I put everything together it started working I think it need that air box installed and carb stops popping
I fixed mine!!!!! Holy crap it took a LONG time. First, dont rely on what you hear when its taken apart. To be accurate it MUST be fully assembled. Then.... Rebuild the carbs with a quality kit and put a dynojet stage 1 kit on it. MAKE SURE you synchronize the carbs afterwards. Also, make sure there is good airflow through the muffler and that the pilot screws are set correctly. I beleive 2.5 turns out is the factory setting, but the dynojet kit says 2. Mine is an 05 with a completely rebuilt/replaced fuel system. I did all that work to narrow down the problem EVERYONE has with these motors. I first took the entire system apart, cleaned out the tank and tore both carbs apart. Replaced ALL the tank parts, pump and hoses as mine were totally rusted away. Rebuilt both carbs after a VERY thorough cleaning, replaced all the rubber "boots" connecting the carbs to the airbox AND motor. Verified valve clearances twice and dissected the muffler to make sure it wasnt plugged. Also changed the spark plugs and replaced the air filter and engine oil. None of that fixed my original sputter/backfire issue until I put the jet kit on. That instantly fixed the problem.
Same problem on mine.... seems to be common thread. Carbs rebuilt, adjusted screws to factory spec, valves adjusted to factory spec, box is on, no limp mode.... still an issue. I see no resolutions below. Has anyone figured this out?
mine done this after sitting up for the winter... its a v-twin 650 with jetted carbs, a dynojet power commander, and a FMF exhaust system. if you put the choke about half way closed it will pick up and run like it's supposed to..but with the choke off, it has no power and it pops back thru the carbs. it makes no difference with the breather on or off
I just bought a 2005 that set up for more than a year. I think that it just need to have cleaner run through it. Drove and then see whats up. Simple things first.
running too lean, rejet with jet sizes 5 numbers bigger, ex if the jet is 145 get a 150 .do both carbs , the rear has a bigger jet than the front, then adjust valves 004 intake 008 exhaust and rock on. problem solved
If you havent changed your plugs? Change them they could be partially fouling it would make it back fire. I too agree with ranstrictjc everything has to be back together.
Hello, you probably have rebuilt carbs and installed the throttle slides in the wrong carbs I did this and mine did exactly the same thing. I swapped the throttle vacuum slides from one carb to the other and the bike ran fine.
Get the air box back on with air filter so it gives accurate mixture of air and fuel. I jetted mine (search for my videos). You have to make sure you have your air/fuel ratio screw set right, and then sync the carburators. If it's popping it's running lean.
I revved my bike up tonight and heard a loud pop and the belt light came on and it sounds just like this bike. And your the only one I see that mentioned a belt light so I am hoping you can tell me why it came on and how to fix it??
put your air box back on it's getting to much air I had the same problem on the one I was working on. As soon I put the air box completely back together even the cover it stop doing that.
***** Thanks a million, had a miss and then it turned into a back fire, so changed plugs, was going to jet the carbs, too much going on there, so just went with the plugs. Fired it up without the air box, it was worse. I put it all back together, now purrs like it should, like you said, getting to much air, Thanks again !!!!!!!!
hi there I was working on one for a friend and had the same problem so I called a dealer and the air box needs to be completely together because it's getting to much air or the filter is dirt or to much oil on the filter or your belt light is on
Backfire solved! I switched carb slides, all that was needed! This was recommended by other commentor. Yes after cleaning carb I just put it back together thinking they were the same-wrong. The mechanical wear conforms a proper fit & function. I followed up w/ a sync of throttles. It's back to running well!
Mine did the same thing. This is what I did. 1. Rebuild carb and clean it 2. Replace spark plugs 3. Make sure valves are at the right distance 0.005 inch intake 0.009 inch exhaust 4. Make sure air filter and everything is put together to make sure you can adjust the carbs correctly. My air fuel screw is 2 turns out. 5. If this doesn’t work change the gas and make sure it’s getting a good supply of gas from the tank.
Tengo el tornillo de aire combustión roto y solo ese carburador me está dando problemas creo que tengo que cambiarlo
I'll tell you what the problem is same problem I got these Kawasakis are fucking junk I have a 650 prairie that's a piece of shit as a motor I'm in the process finding a replacement
Nah dude you just suck at working on them. My 700 screams all day long and runs great. You just need more practice. Don’t give up on it. They’re great engines. Get a repair manual instead of just guessing
my 2005 750 is doing the same thing now. Ive been researching here on youtube for days now, but its all the same questions and solutions. I was gonna just take it to a shop, but I hate to be without my bike for 2 to 3 weeks...this sucks tho !!!
Have you found a solution?
Mine miss fire all the time
Everyone always post vids thinking people can help. These bikes have a lot of parts that can go wrong. It's just a process of elimination. Check fuel delivery to carbs, check carbs, valves, timing i.e. stretched timing chains or bad crankshaft positioning sensor. It could also just boil down to having a bad battery. There is so much that can go wrong. You need to be mechanically inclined to own one of these bikes. Too many people say brutes are junk, but they just suck at working on the four wheeler. These bikes run like a scalded dog whenever they are dialed in.
Hello, I have a problem with my brute force 750 fi, it spins to half the speed, at full throttle it chokes as if it was cut off by something
I have the same problem and I don't have any idea how to fix.Any help would be great thanks
I'm having same problems
did you solve it somehow?
@soymarcepro4095 well when I adjusted intake and exhaust value it still did it but when I gave up I put everything together it started working I think it need that air box installed and carb stops popping
Так в чем дело то было? Точно такая же беда
Worthless, how many guys in here asking for a result and OP can't reply.
мне кажется проблема с цепями, в этом моторе используется 3 цепи ГРМ, каждая растянулась вот и ушли метки, клапана регулировать смысла нет.
Kfx 700 is doing the same thing
Put the air box back on.
I fixed mine!!!!! Holy crap it took a LONG time. First, dont rely on what you hear when its taken apart. To be accurate it MUST be fully assembled. Then.... Rebuild the carbs with a quality kit and put a dynojet stage 1 kit on it. MAKE SURE you synchronize the carbs afterwards. Also, make sure there is good airflow through the muffler and that the pilot screws are set correctly. I beleive 2.5 turns out is the factory setting, but the dynojet kit says 2. Mine is an 05 with a completely rebuilt/replaced fuel system. I did all that work to narrow down the problem EVERYONE has with these motors. I first took the entire system apart, cleaned out the tank and tore both carbs apart. Replaced ALL the tank parts, pump and hoses as mine were totally rusted away. Rebuilt both carbs after a VERY thorough cleaning, replaced all the rubber "boots" connecting the carbs to the airbox AND motor. Verified valve clearances twice and dissected the muffler to make sure it wasnt plugged. Also changed the spark plugs and replaced the air filter and engine oil. None of that fixed my original sputter/backfire issue until I put the jet kit on. That instantly fixed the problem.
WHAT IS JET KIT ON? I HAVE THE SAME PROBLEM
Number 2 cylinder
Одень фильтр на место, Олежа)
И всё?
Same problem on mine.... seems to be common thread. Carbs rebuilt, adjusted screws to factory spec, valves adjusted to factory spec, box is on, no limp mode.... still an issue. I see no resolutions below. Has anyone figured this out?
Have to have your air box on with the filter delt with the same thing on mine get a dyno jet stage 1 and you will love it
Mud wasp in the vent line for the cv diafram.
Mine does the same thing and it’s a 2009 with 200 hours on
ANDERS TAYLOR did you find the problem? I’m having the same issue
yup you need the crank vent to suck the slides up when the butterflies are bieg opened they are more or less sincronized
The crank vent does not suck the slides up. But you do need the box on to run correctly
carbs are dirty, take them off and clean everything all ports
would like to know if you found out what it was im having the same issue
matt reeve did you find out what it was ?
@@renerodriguez5531 the cam the value adjustment was out
mine done this after sitting up for the winter... its a v-twin 650 with jetted carbs, a dynojet power commander, and a FMF exhaust system. if you put the choke about half way closed it will pick up and run like it's supposed to..but with the choke off, it has no power and it pops back thru the carbs. it makes no difference with the breather on or off
lwj w hi. How did you end up fixing the issue? I have similar problems with my brute 😔
I just bought a 2005 that set up for more than a year. I think that it just need to have cleaner run through it. Drove and then see whats up. Simple things first.
Im having the same problem with my 06 brute, any solutions? Timing is ok, valves are ok, no belt light
what was i have the same problem
how did you solve the problem
Inspect valve lash. Most likely tight intake valves
running too lean, rejet with jet sizes 5 numbers bigger, ex if the jet is 145 get a 150 .do both carbs , the rear has a bigger jet than the front, then adjust valves 004 intake 008 exhaust and rock on. problem solved
kytnmtn4whlin running to lean???? wat makes the flame fuel!! carbs are fine. sad spark plug or sad coil will 100% cause this
Yes.it's runing too lean...When the flames goes to the intake or air filter,that means the ratio air-fuel is too poor...
A bad spark plug or coil will do a backfire in the exhaust...
RESET BELT LIGHT. Brute will go into limp mode when a certain Km or Hour is reached so you perform maintence on the belt.
SpectumHD M I have a similar issue. Would the belt light need to be on for this possible fix to apply/work.
ignition timing too early? valve clearance of intake valves set properly?
If you havent changed your plugs? Change them they could be partially fouling it would make it back fire. I too agree with ranstrictjc everything has to be back together.
Hello, you probably have rebuilt carbs and installed the throttle slides in the wrong carbs I did this and mine did exactly the same thing. I swapped the throttle vacuum slides from one carb to the other and the bike ran fine.
Reset the computer with the plug under the seat or use a paper clip and go from black to red to reset it
Show how... can't find anything about this!
Get the air box back on with air filter so it gives accurate mixture of air and fuel. I jetted mine (search for my videos). You have to make sure you have your air/fuel ratio screw set right, and then sync the carburators. If it's popping it's running lean.
ranst rickjc
I would say your belt light is on, and the computer is limiting the spark which causes backfires because of the fuel ending up burning in the exhaust.
I revved my bike up tonight and heard a loud pop and the belt light came on and it sounds just like this bike. And your the only one I see that mentioned a belt light so I am hoping you can tell me why it came on and how to fix it??
put your air box back on it's getting to much air I had the same problem on the one I was working on. As soon I put the air box completely back together even the cover it stop doing that.
***** Thanks a million, had a miss and then it turned into a back fire, so changed plugs, was going to jet the carbs, too much going on there, so just went with the plugs. Fired it up without the air box, it was worse. I put it all back together, now purrs like it should, like you said, getting to much air, Thanks again !!!!!!!!
aquapatio1 Your welcome
I'm sure he had the problem before he took air box off.Not the problem.
Did you ever figure it out? Mine is doing the same thing. If you get it figured out I could surely use some input. Thanks
hi there I was working on one for a friend and had the same problem so I called a dealer and the air box needs to be completely together because it's getting to much air or the filter is dirt or to much oil on the filter or your belt light is on
Nice paint job
Same happend to mine ... I need some help too and steel looking to solve this problem ¡¡¡
did you ever find out the problem? mine does the same exact thing
jerry brown mines doing it to Ik how to fix it
@@jamielimbrick6815 how did you fix it?