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Hey guys, figure you guys would have some helpful direction or answers.
So, 05 Sportsman 700 carb, new carb, fuel pump, new plugs, new air filter, new everything I can think of that is usually the running issues. Starts up fine, seems to run fine, but if under load, two people, or even one person, up a hill, or pulling a drag chain for the driveway, it starts to cut out and sputters and loses all power, until I back off on the throttle and just barely try to let itself catch itself and then I can take off again.
I am going crazy trying to figure this thing out. Other than that, the quad runs great. Parents bought bran new, just used around the property, 5000 miles on it. Any ideas???
Good Morning All!,
After a significant amount of reading and tinkering, I'm stumped. We have a pair of Arctic Cat DVX 90s (4-stroke), and one of them runs very rich at wide open throttle. I've cleaned the carb (which was installed new last year), verified the main jet (80) to be per the original spec, installed a new air filter, tried a hotter spark plug (CR6HSA), and adjusted the valves (tightened a modest 0.0005" but improved starting). The hotter spark plug may have help just a bit, but not appreciably.
Just for fun, I swapped the CDI between machines, and that didn't help either.
Fouling plugs very quickly, but not to the point the machine will not run or start. [black instantly]
Logically, I assume I'm revving out, but the other machine doesn't "stumble/blubber" anything like this one.
Should I try a smaller main jet?
Any ideas you guys may have would be much appreciated.
Thanks in advance everyone.
So my quad will start and run pull start, i installed new battery, solenoid, ignition. the problem is
1 the starter will try but not start. the quad.
2 when running i cannot shut it down with either the switch or the ignition i shut it down by allowing the fuel to run out.
3 no lights come on headlights or brake lights
when i turn the ignition on my neutral light works as well as the reverse indicator.
any suggestions greatly appreciated.
By Dra O
posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
-fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
-along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
-I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
-can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
-it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
-I THINK it has a mikuni model x carb - diaphragm is ID 26mm OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
-last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
-any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
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I have a Kawasaki bayou 4WD that started squealing when giving it the gas from a stop. It almost sounds like a fan belt but the dealer replaced the belt about 30 hours ago, so I don't think it is that. As best as I can tell, it actually sounds like it is coming from the front end. Once I am running and moving at a speed, I don't hear the squealing anymore. My first thought was to put fan belt dressing on the fan belt, as a quick test for the problem. It makes the noise when hot or cold.
Another problem, that started before the dealer changed the fan belt, is that you give the quad a little gas, and nothing, give it more, and nothing, give it more, and it lurches and takes off. The dealer said it needs a new clutch, which I don't buy. less than 400 hours and it needs a clutch? I would say it needs an adjustment. When the quad is cold, as in I just started it for the first time in hours, it does not lurch. It is just fine. It lurches only when it gets hot, as in when you can hear the fan once in a while to cool the oil.
Any help or insights would be great.
By Connie Johnson Donald Hudson
Smells like gas in the oil ... Also, recently replaced belt, new BT does not have grooves on both sides, does that pose a problem? Also just bought and replaced new carburetor, never has it idled better, but give it gas and it backfires very loudly!
How hard is it to change the outer seals on the rear differential mine are leaking fluid and I have no idea on how to change them out any help would be great thanks
A week ago I could not even get close to starting it. But now I adjusted the valves (exhaust valve was not closed). i got it running but would not run without choke. i adjusted the float because it was to low tried starting it up again and it would not even start. So i went back and looked at the valves and the valve was now open again so i adjusted it and it started right up and ran perfect without choke. So i put it all back together thinking it was ready to go. Started it up and let it run for a little bit. i turned it off and tried starting it again there was NOTHING. took it apart and there was 0 compression and the exhaust valve was open again. I am completely lost need help PLEASE!!!:aargh:
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